SWMM 5.0 Update History ======================= ----------------------- Build 5.0.015 (4/10/09) ----------------------- Engine Updates 1. Storage unit nodes have a new optional property named Infiltration that can store Green-Ampt infiltration parameters for the unit and thus allow it to serve as an infiltration basin. The Green-Ampt infiltration model was modified to explicitly include the effect of ponded water depth on infiltration rate. (See infil.c, massbal.c, node.c, and objects.h). 2. Different sets of Initial Abstraction parameters (maximum depth, initial depth, and recovery rate) can now be specified for each of the three unit hydrographs (short term, medium term, and long term) that comprise an RDII Unit Hydrograph group (see keywords.h, keywords.c, objects.h, rdii.c, and text.h). 3. A Meander Modifier was added to a Transect's parameters. It is the ratio of the length of a meandering main channel to the length of the overbank area that surrounds it. This modifier is applied to all conduits that use this particular transect for their cross section. It assumes that the length supplied for these conduits is that of the longer main channel. SWMM will use the shorter overbank length in its calculations while internally increasing the main channel roughness to account for its longer length. (See dynwave.c, flowrout.c, link.c, objects.h, and transect.c). 4. NWS files in space delimited TD 3240 or 3260 format that include a station name field have been added to the types of rainfall files that are automatically recognized by SWMM (see rain.c). 5. The 2 GB binary output file size limit for runs made under the GUI that was inadvertently added into release 5.0.014 was removed (see output.c). 6. Any backflow that flows into an outfall node due to the head condition at the node is now correctly reported as part of the node's Total Inflow result (see node.c). 7. A fatal error is now generated if the smallest time interval between values in a rainfall time series does not match the recording time interval specified for the associated rain gage object (instead of internally adjusting the gage interval and issuing a warning message) (see error.c, error.h, and gage.c). 8. The normal flow limitation for dynamic wave flow routing based on the Froude number now requires that the latter be greater or equal to 1.0 for both the upstream and downstream flow depths rather just for either of these (see dynwave.c). 9. An reporting error for the overflow rate into the ponded volume for a node that floods under dynamic wave flow routing was corrected (see dynwave.c). 10. The practice of not allowing a computed top surface width to be less than the width at 4% of the full conduit depth for dynamic wave flow routing has been dropped in favor of using the actual width, no matter how small (see dynwave.c). GUI Updates 1. Data entry forms were modified to support the new modeling features described in the Engine Updates items (1) - (3). 2. A problem with the way that conduits with elevation offsets were displayed in profile plots drawn prior to a run was corrected. ----------------------- Build 5.0.014 (1/21/09) ----------------------- Engine Updates Rain Gages (gage.c, table.c, error.c, error.h, and objects.h) 1. The recording interval for a rain gage is now automatically adjusted to be no greater than the smallest time interval for the gage's time series data (with a warning message written to the Status Report). 2. When two or more rain gages reference the same time series data, a fatal error message is now generated if the Rainfall Formats (intensity, volume, or cumulative volume) for the gages are not all the same. Infiltration (infil.c) 3. The Green-Ampt infiltration rate was corrected for the case when the surface becomes saturated part way through the current time step. 4. The saturated hydraulic conductivity is no longer needed by the Curve Number method to compute a regeneration rate for infiltration capacity. The latter is now set simply to the reciprocal of the user supplied drying time. Thus the CN method now requires only two param- eters (the CN and the drying time). 5. An optional monthly adjustment pattern can now be used to modify the recovery rate of infiltration capacity by month of year. The name of this pattern is specified as part of the Evaporation data. See the Help file or the Users Manual for details. (This also affects files climate.c, keywords.c, project.c, enums.h, objects.h, and text.h). Flow Routing (flowrout.c, node.c, inflow.c, link.c, and objects.h) 6. A new Minimum Slope option has been added. When this option is non- zero a computed conduit slope is not allowed to be below this value. The default is 0. (Note: the slope of a conduit whose elevation difference is below 0.001 ft is first computed using this elevation difference and then is compared to the Minimum Slope value.) (The following files were also changed for this feature: keywords.c, project.c, enums.h, globals.h, text.h). 7. An optional Baseline Time Pattern was added for external inflows at nodes. It can be used to apply a periodic adjustment to the baseline inflow value by month of year, day of week, etc. See the Help file or the Users Manual for more details. 8. Specific conduits can now be designated as Culverts and have Inlet Control flow computed for them under Dynamic Wave flow routing. 9. The rating curve used to determine flow through an Outlet can now be based on either the freeboard depth above the outlet bottom (as before) or on the head difference between the upstream and downstream nodes. 10. The calculation of the maximum outflow that a node can release over a time step should be based on the initial volume, not the final volume, at the node. 11. A problem with the program not accepting an ideal pump when the connecting upstream conduit had an adverse slope was fixed. 12. The formula used to compute conduit slope was modified to match that used by HEC-RAS. 13. A problem with the program crashing when the No Routing option was selected in combination with the Save Outflows Interface File option was fixed (see output.c). 14. Under Steady Flow and Kinematic Wave routing one can now use a Dummy conduit that connects to a node at higher elevation without having to specify an inlet offset. Dynamic Wave Flow Routing (dynwave.c, link.c, and node.c) 15. Under-relaxation of flows for pumps between iterations of the governing equations is no longer used since it can produce a solution that does not conform to the pump's operating curve. 16. Instead of the average area, the upstream weighted area that accounts for near-supercritical flow is now used in the dQ/dH term for conduits. 17. The upstream/downstream Froude numbers used to check for normal flow are now computed using hydraulic depth rather than flow depth. 18. When ponding is allowed, ponded volume is now computed from the computed nodal depth rather than adjusting the depth to accommodate the ponded volume based on the excess of inflow versus outflow. This is a return to the original method that was used up until Release 5.0.010 and makes ponding (which is actually a form of storage) consistent with the way that storage nodes are normally treated. 19. The volume at the inlet node of Type I pumps (where an implicit wet well is assumed to occur) is now determined on the basis of computed depth, just as with storage nodes, rather than computing depth from the change in volume. 20. The possible closing of tide gates on outfalls directly connected to orifice, weir, or outlet links is now correctly accounted for. Conduit Cross-Sections (xsect.c) 21. The modified baskethandle (MODBASKETHANDLE) cross-section shape was extended to allow the circular top to have any desired radius equal or greater than half the section's width. It thus becomes an upside down version of the Rectangular-Round shape. The section geometry functions for both shapes received extensive revision. Control Rules (controls.c) 22. "SIMULATION MONTH" and "SIMULATION DAY" (meaning month of the year and day of the week, respectively) have been added to the types of time conditions that can be used in a control rule condition clause. Pollutant Buildup/Washoff (subcatch.c, landuse.c, and consts.h) 23. Washoff of a user-specified initial buildup when there is no buildup function specified now works correctly. 24. The way that concentrations in runoff are combined with those from runon and direct rainfall was modified so as to produce more consistent results, especially when a BMP removal value is appled. Water Quality Routing (qualrout.c, routing.c, treatmnt.c) 25. For storage units, the finite difference form of the mass balance equation was replaced with the analytical CSTR solution. 26. An inflow rate adjustment was added when routing quality through conduits under Dynamic Wave flow routing to help lower the mass continuity error. 27. The formula for updating the hydraulic residence time (HRT) in a storage node was revised. 28. Quality routing under Steady Flow routing is now treated as a special case where the concentration within a conduit simply equals that of the upstream node. 29. Any reverse flow into the system that occurs at an Outfall node is now treated as an external inflow with respect to water quality and will therefore contain whatever pollutant concentration was specified for external inflows at the node even if no external flow inflow was defined. This feature can be used to model saltwater or contaminant intrusion in tidally influenced channels. Groundwater (gwater.c): 30. The mass balance equations were re-formulated in a simpler fashion. 31. The flow equation was re-expressed in terms of distances above the aquifer bottom instead of absolute elevations. 32. The equation for computing the maximum infiltration rate that the upper zone can accept was corrected. Snowmelt (snow.c) 33. Snow removal for a subcatchment now works by removing snow once the "Depth at which removal begins" is reached. The fraction of this amount that remains on the surface is whatever is left over after all of the redistribution options are satisfied. 34. The "Depth at which removal begins" value is now correctly converted to internal units of feet. RDII (rdii.c) 35. A problem with no RDII being produced when two or more RDII unit hydrographs utilized the same rain gage was fixed. Time Series (table.c, error.c, error.h, objects.h) 36. Time Series data can now be imported from an external file instead of having to be listed in the project's input file. See the Users Manual or the Help file for details. Simulation Options 37. A user can now choose to ignore any combination of the following process models when running a simulation: Rainfall/Runoff, Snowmelt, Groundwater, Flow Routing and Water Quality (swmm5.c, project.c, runoff.c, subcatch.c, routing.c, keywords.c, keywords.h, text.h, and globals.h). Status Report (statsrpt.c) 38. The heading for the maximum flow column in the Link Flow Summary table was changed to "|Flow|" to show that the flows listed are absolute values. 39. The labels "Mgal" and "Mltrs" were replaced with "10^6 gal" and "10^6 ltr", respectively. 40. The widths for the various types of flow volume fields (e.g., runoff volume, node inflow volume, etc.) were increased in size. Binary Output File (output.c) 41. The Report Start Time written to the binary results is now adjusted to be be one reporting period prior to when the first result is reported so that the GUI uses the correct date when it displays results. Output Report (command line version) (report.c) 42. Time series tables for reported subcatchments now report Snow Depth, Groundwater Elevation, and Groundwater Flow (provided that snowmelt and groundwater processes are included in the simulation). GUI Updates: 1. Support was added for the following new engine features: a. minimum conduit slope option b. culvert designation for specific conduits c. monthly infiltration recovery Pattern d. Baseline Time Pattern for external inflows e. updated Modified Baskethandle cross-section shape f. either depth-based or head-based Outlet rating curves g. options to ignore selected process models h. use of an external file as source of time series data. 2. Regarding 1h above, the Time Series Editor dialog was modified to include the external data file option. 3. A new category of Simulation Options named Reporting has been added. When this category is selected for editing in the Data Browser, a Reporting Options dialog appears from which one can limit the number of objects whose simulation results are saved and can be reported. The default is to save results for all objects. 4. The Group Editing feature was extended to include subcatchment Snow Packs and Groundwater Flow parameters. 5. The Help -> Tutorial menu command now works correctly to launch the newer HTML version of the SWMM5 Tutorial Help file. 6. The File -> Export -> Hotstart File command now converts metric results to internal SWMM US units before saving them to the hotstart file. 7. Commas are no longer recognized as item separators when reading input files since this was causing problems when a comma was used in the ID name of an object (which is allowable). 8. The coordinates of the default natural areal depletion curve for snow packs were changed to correspond to those appearing in the National Weather Service publications on which SWMM's snow melt routines were based. 9. A problem with not loading a specified startup input file when epaswmm5.exe is launched from the command line (or from an Explorer shortcut) was fixed. 10. A problem with the simulation progress meter not displaying the correct number of elapsed days during long-term simulations was fixed. 11. A problem with Profile Plots not being updated correctly when users changed certain display options was corrected. 12. The following updates to the Profile Plot feature were made: i. The selected links are now checked to make sure that they exist and form a connected path. ii. The vertical axis scaling can now be set from the Profile Plot Options dialog. iii. The filled-in water level at junctions is now drawn only as high as the maximum junction depth (i.e., the ground surface), even if the HGL is higher. 13. A problem with copying just a single column of a Tabular Report to the clipboard or to a file was corrected. 14. A problem with the selection buttons on the Time Series and Tablular Report Selection dialog becoming stuck in the disabled mode was fixed. 15. If an external file (such as a rainfall climate, or interface file) resides in the same directory as the project file then the directory path portion of the file name is omitted when the file name is saved within the project file. This will make it easier to share project files with other users and computers. 16. The name of the "Rainfall" theme variable was changed to "Precipitation". 17. When the Auto-Backup program preference is selected, a backup file is now created whenever the current project file is saved to disk, not just when the project is first opened. ----------------------- Build 5.0.013 (3/11/08) ----------------------- Engine Updates: 1. The check on acceptable values for site latitude was corrected (see climate.c). 2. The definition and implementation of the PID controller was changed. See the Help file or the Users Manual for details (see controls.c). 3. The following changes were made to the dynamic wave flow routing routine in dynwave.c: a. A new method that places more weight on upstream conduit geometry as the Froude number approaches 1 was added. b. A code re-factoring error that crept into the inertial term of the momentum equation was corrected. c. The flow in a fully flowing open channel can no longer be greater than the full normal flow. d. The Normal Flow Limit based on both slope and Froude number was modified to simply implement the two criteria together in the same fashion as they are done individually. e. A check was added that prevents any flow out of a node that is dry. f. The ponding computation was reverted back to that of 5.0.009 (depth is computed from volume rather than volume computed from depth) to better maintain flow continuity. g. Using the maximum allowable change in depth at a node as a criterion for selecting a variable time step was restored. 4. The crown elevations of any connecting non-conduit links are now considered when determining a node's crown elevation (see flowrout.c). 5. The possibility that the initial setting of an orifice was not being made correctly was eliminated (see link.c). 6. Error checks were added to test for invalid numbers in a hot start file (see routing.c). GUI Updates: 1. Checks were added to test for erroneous values in an INI file that would prevent a graph from displaying properly. ---------------------- Build 5.0.012 (2/4/08) ---------------------- Engine Updates: 1. The summary results tables written to the Status Report file have been updated and expanded. See the Users Manual for more details. Code changes to support this were made to dynwave.c, flowrout.c, funcs.h, inputrpt.c (a new module), keywords.c, keywords.h, link.c, objects.h, output.c, report.c, stats.c, statsrpt.c (a new module), and text.h. 2. Conduit offsets can now be specified as an absolute elevation or, as before, a relative depth above the node invert. The same is true for the bottom of orifices, weirs, and outlets. The "Link Offsets" setting in the GUI and the corresponding LINK_OFFSETS entry in the project's input file determine which option, DEPTH or ELEVATION, is in effect. (see project.c, link.c, keywords.c, keywords.h, globals.h, and text.h). 3. A PID-type controller has been added to the types of modulated control rules that are available. See the Help file or the Users Manual for instructions on how to use this feature (see controls.c and keywords.c). 4. In the simulation results, "flooding" is now considered to occur whenever the water level exceeds the top of a node, whether ponding occurs or not. Before, flooding was only recorded when there was no ponding and node overflow was lost from the system (see dynwave.c, flowrout.c, massbal.c, node.c, stats.c, and statsrpt.c). 5. The point at which the time to drain the upper soil zone for Green-Ampt infiltration is first calculated was moved from time 0 to the time when the first rainfall period occurs. This fixes a problem where different runoff hydrographs were being produced when a project's start date was shifted slightly (see infil.c). 6. The criteria used to determine when steady state flow conditions exist were changed to more closely follow those used in SWMM 4 (see routing.c and the Help File or Users Manual for the Skip Steady Periods option). 7. The optional user-assigned maximum flow limit for conduits was made operational for all flow routing options, not just Dynamic Wave routing (see link.c). 8. SI unit conversion problems for both a pump's on/off depth settings and its pump curve slope values were fixed (see link.c). 9. The possibility that ponding could occur at the inlet (wet well) node for a Type I pump was added (see dynwave.c). 10. A mistake in the Hazen-WIlliams head loss formula for force main conduits was corrected (see forcmain.c). 11. The minimum limit of 0.0001 on flow area and hydraulic radius computed from flow depth during dynamic wave routing was removed since flow depth is already limited by this amount (see dynwave.c). 12. The flow direction test added for checking UPSTREAM CRITICAL and DOWNSTREAM CRITICAL flow conditions in dynamic wave flow routing was removed to prevent solutions from becoming stuck (see dynwave.c). 13. The use of a maximum allowable change in depth at a node as a criterion for selecting a variable time step for dynamic wave flow routing was dropped (see dynwave.c). 14. A more refined method for computing the flow across a bottom orifice at low heads was implemented. (see link.c). 15. The head loss calculation caused by flap gates in weirs was extended to orifices as well (see link.c). 16. The computation of depth as a function of area for a trapezoidal channel was extended to consider the case where the user used 0 for the side slopes (making it a rectangular channel - a holdover from SWMM 4) (see xsect.c). 17. A bug introduced in 5.0.010 that was preventing RDII from being computed for unit hydrographs that used the same rain gage as another unit hydrograph was fixed (see rdii.c and objects.h). 18. Pollutant loading from RDII was corrected to be based on the pollutant's specified RDII quality rather than its rainfall quality (see routing.c). 19. The "Snow Only" option for the buildup of a pollutant was never actually implemented and has now been added (see subcatch.c). 20. Additional error checking for valid snow melt and snow pack input parameters was added (see snow.c, error.c, and error.h). 21. The same runoff threshold is now used for both pollutant washoff (when above the threshold) and buildup (when below the threshold) to avoid non-zero runoff concentrations from being reported during periods with negligible runoff (see subcatch.c). 22. The values for total system outflow and system flooding that are saved to the binary results file at each reporting time step are now set equal to the same values that are used for computing the overall flow continuity error, thus avoiding inconsistent system outflow values being generated for some data sets (see output.c). 23. For the command line version of SWMM, the default END_TIME option was corrected from being 24 days to 0 days (i.e., midnight of the END_DATE value) (see project.c and swmm5.c). GUI Updates: 1. The Status Bar on the bottom of the main window was given a new look, with drop down buttons added for changing the Link Offsets convention and the project's flow units. 2. A combo-box was added to the Nodes/Links page of the Project Defaults dialog to select the Link Offsets convention (in addition to the button on the Status Bar). 3. The choice of Flow Units was removed from the General Options page of the Simulations Options dialog and placed into a drop down button on the main window's Status Bar. (As before, one can also set flow units from the Nodes/Links page of the Project Defaults dialog. 4. A Bookmarks panel was added to the Status Report window to make it easier to navigate between different sections within the report. 5. A new Measurement Tool button was added to the Map Toolbar that allows one to measure the distance of a polyline or the area of a polygon drawn directly on the study area map. 6. Storage Units were added to the choice of objects that can be edited using the Group Editor dialog. 7. The length assumed for non-conduit objects displayed on a profile plot was reduced from 100 ft to 10 ft. 8. A "View Conduits Only" option was added to the Profile Plot Options dialog that makes the plot display just the water depth in the conduits along the profile and not show the HGL and ground surface. This allows one to get a better view of how full a conduit is. 9. The Project Data viewer (launched when Project | Details is selected) can now be split into two views by selecting Window | Split from its menu bar (or Window | Remove Split to remove the split view). 10. The number of decimal places set for each computed variable on the Number Formats page of the Program Preferences dialog is now saved between sessions as the other preferences are. 11. Current simulation results are now always saved between sessions (if requested by the user) even if data were modified after the last run was made. In this case, when the project is opened again, the Run Status icon will show that results are available but need updating. 12. If the user changes the display format of a Date/Time axis in the Graph Options dialog and checks the Default box in the dialog, then this format will be used for all future time series plots for the current project. 13. A problem with the Profile Plot dialog not always identifying the path of fewest links between two nodes when asked to do so was corrected. 14. Entries in the [REPORT] section of a project input file that were used to define reporting options for the command line version of SWMM 5 will no longer be lost when the project is run under the GUI version of SWMM. The GUI version simply ignores them but adds them into the project file whenever it is saved. 15. Conduit lengths and areas were always being re-computed after the study area map's dimensions or distance units were changed with the Map Dimensions dialog rather than only when the user selected the re-compute option on the dialog. 16. The backdrop map now pans to the correct position when the Edit | Find Object command is used to locate an object that is currently not in view on the staudy area map. 17. The problem of having the name of a subcatchment's outlet node or groundwater node be lost whenever that node was converted to another type using the study area map's right-click popup menu was fixed. 18. The Statistics Report analyzer was failing to include the last event in its calculations for some data sets. 19. Additional input validation was added to the Snow Pack editor form. ---------------------- Build 5.0.011 (7/16/07 ---------------------- Engine Updates: 1. A bug that prevented Weir and Outlet settings from being updated after they were changed by control rules was fixed (see link.c). 2. The control setting for a Weir was not being accounted for when computing an equivalent orifice coefficient for surcharged flow or when computing flow through a V-notch weir (see link.c). 3. The reported depth of flow through a Weir was not taking into account the Weir's control setting (see link.c). 4. An update made in 5.0.010 to how ponded depths and volumes are computed under dynamic wave flow routing was corrected (see dynwave.c). 5. The equations used to mix the quality of runon, rainfall and ponded water over a subcatchment were revised to prevent numerical instability at very low volumes (see subcatch.c). 6. Missing values in NCDC rainfall files that use the 'M' flag are now added to the total number of missing records reported (see rain.c). GUI Updates 1. A bug introduced in release 5.0.010 that neglected to place quotation marks around Map Labels and backdrop file names (which can have spaces in them) when a project was saved to file and which caused problems when the project was re-opened has been fixed. ----------------------- Build 5.0.010 (6/19/07) ----------------------- Engine Updates: 1. All "float" variables were re-declared as "doubles" (except for those variables written to binary interface files) and the engine was re-compiled using the Microsoft VC++ 2005 compiler. 2. A new NO ROUTING option was added which allows a run to ignore any flow routing and only compute runoff (see swmm5.c, keywords.c, stats.c, and enums.h). 3. A new type of pump, an Ideal Pump, was added which pumps at a rate equal to the inflow to its inlet node and does not use a pump curve (see enums.h, link.c, and flowrout.c). 4. A new type of conduit shape, a Custom Shape, was added which allows users to define their own cross-sectional geometry for closed conduits. To implement this feature, a new type of curve, a Shape Curve, was added which records how the width of the cross-section varies with height. (See keywords.c, link.c, project.c, report.c, shape.c, xsect.c, enums.h, funcs.h, globals.h, objects.h, and text.h). 5. Another new type of conduit shape, a Circular Force Main, was added. It is a circular pipe that uses either the Hazen-Williams or Darcy-Weisbach equations, instead of the Manning equation, for pressurized flow only. The Hazen-Williams C-factor or the Darcy-Weisbach roughness height is one of the shape's parameters. The choice of which equation to use (for Force Mains only) is a new global option. (See project.c, forcmain.c, dynwave.c, keywords.c, link.c, xsect.c, enums.h, globals.h and text.h). 6. Pumps can now have startup and shutoff inlet node depths supplied directly as part of a pump's properties rather than as part of a control rule. (See link.c, routing.c, objects.h, and funcs.h). 7. Orifices can now have timed gate openings and closings as in SWMM 4 (i.e., the SWMM 4 ORATE parameter). (See link.c and objects.h). 8. Unit Hydrographs used for RDII inflows can now have an initial abstraction loss associated with them. Consult the Users Manual or the Help file for details. (See rdii.c and objects.h). 9. A new criterion was added to determine when a conduit has supercritical flow and therefore normal flow conditions might apply. It is based on both water surface slope and the Froude number (as opposed to just one or the other). (See dynwave.c, project.c, keywords.c, enums.h, and text.h). 10. A Flow Instability Index is now computed for each non-pump link. It counts the number of time steps in which the link's flow is either higher or lower than the flows at the previous and next time steps. The Status Report lists the links with the five highest indexes. (See objects.h, stats.c, and report.c). 11. Node volumes are now initialized to take account of any initial ponding that may be implied by the node depth stored in a hot start file (see flowrout.c). 12. The area corrections to the inlet and outlet loss terms under dynamic wave flow routing that were introduced in Build 5.0.008 were removed (see dynwave.c). 13. To comply more closely with standard hydraulic practice, the head across an orifice is now computed with respect to the midpoint of its opening, rather than to the bottom. Also, orifices are now treated the same as weirs in terms of not contributing any surface area to their end nodes (see link.c and dynwave.c). 14. The partly opened setting for an orifice is now interpreted as fraction of the full orifice opening height available rather than as the fraction of the full area available. Also, the equivalent discharge coefficient for a partly full orifice is now re-computed whenever the setting of the orifice changes (see link.c). 15. In kinematic wave flow routing, when a conduit's inflow is limited to its maximum normal flow, its corresponding inflow area is now correctly normalized to the full flow area (see kinwave.c). 16. For dynamic wave flow routing, the criteria used to check if a node is not full before using its depth to compute a variable time step was corrected to avoid excessively small time steps (see dynwave.c). 17. The width v. depth table for circular shapes was expanded to 51 entries to match that of the other tables for this shape (see xsect.dat). 18. The number of entries in the geometry tables for irregular cross-sections was increased to 51 entries (see objects.h). 19. For Divider nodes, both end nodes of the diversion link are now checked to see if one of them is connected to the divider node (see node.c). 20. Conditions on Outlet links are now correctly recognized in control rule statements and an error message is now generated if more than one rule clause is placed on the same line (see controls.c). 21. When the Ignore Rainfall option is used, a rain gage's rainfall is now properly initialized to 0 to prevent a spurious rainfall value from being reported (see gage.c). 22. An explicit check is now made in the engine (which already exists in the GUI) to see if the ID name of the outlet of a subcatchment exists as both a node and a subcatchment. If so, then Error 108 is thrown. (See subcatch.c). 23. The column in the Node Depth Summary of the Status Report that previously displayed the total volume of ponded water at each node (but was labelled "Total Flooding") now displays the maximum volume of ponded water at each node and is labelled "Max Vol. Ponded". Also, flow values appearing in the Status Report's tables were expanded to 3 decimal places for MGD and CMS units, and an additional decimal place was added to ponded area and conduit length in the report's Input Summary tables (see stats.c and report.c). 24. When a node is ponded under dynamic wave routing, the water depth is now always set equal to the ponded depth rather than the smaller of the ponded and dynamic depths (see dynwave.c). 25. A more efficient way of processing the mathematical expressions used in treatment functions has been implemented (see mathexpr.h, mathexpr.c, and objects.h). 26. A bug in the Groundwater routine that allowed infiltration to continue even when the entire groundwater table was saturated was fixed as was a metric units conversion error on computed groundwater flow (see gwater.c). 27. The locations of the left and right overbank stations for an irregular channel transect are now adjusted by the Station Modifier multiplier, in the same way as all of the other station locations across the transect are. 28. An error in computing the flow contribution of the triangular ends of a trapezoidal weir was corrected (see link.c). 29. A roundoff error under kinematic wave and steady flow routing that sometimes caused nodes to be incorrectly reported as ponded was fixed (see flowrout.c). GUI Updates: 1. A "Tools" item was added to SWMM's main menu. The existing menu options to set Program Preferences and Map Display Options were moved there. In addition, it contains a "Configure Tools" option that can be used register add-in tools with SWMM 5. Consult the Users Manual or the Help file for more information regarding add- in tools. 2. A "None" option was added to the choice of routing methods on the General page of the Simulation Options dialog to accommodate the new No Routing analysis option. 3. The Property Editor for Pumps was modified to allow the Pump Curve field to remain blank (or accept a *) to signify the new Ideal type pump and to accept startup and shutoff depths. 4. The Property Editor for orifices was modified to include a Time To Close/Open field. 5. The Unit Hydrograph Editor dialog was modified to include the new Initial Abstraction parameters. 6. The Analysis Options dialog was modified to accommodate the new supercritical flow criterion. 7. The Cross-Section Editor and the Curve Editor were modified to accommodate the new Custom cross-section shape feature as well as the new Circular Force Main shape. 8. The File | Export menu has a new option that, once a run has been successfully made, will export the node and link results at the current time period being viewed to a Hotstart file. 9. The popup menu for toggling the map's Auto-Length feature was replaced with a check box on the Status Panel. 10. A check box was added to the Map Dimensions dialog to ask if conduit lengths and subcatchment areas should be recomputed when the Auto- Length setting is on. 11. The Group Delete feature now offers the option of only deleting objects with a specific value for their Tag property. 12. Ponded Area was added to the list of node parameters that can be assigned a default value through the Project >> Defaults menu item. 13. The epaswmm5.ini file that contains a user's program preferences is now saved to the users Application Data folder, in a sub-folder named EPASWMM, rather than to the user's home folder. 14. Conduit slopes are no longer displayed as absolute values, so that negative slopes will show up on a thematic display on the study area map and will also be identified when a map query is made. 15. The bitmap image on the Run speed button was replaced. 16. The automatic identification of a connected path of links between two nodes specified on the Profile Plot dialog now uses the path with the smallest number of links. 17. The Study Area Map's Zoom Out feature no longer uses a zoom out to previous extent. Instead it zooms out relative to the current center of the map. 18. The Animator toolbar was made a permanent part of the Map Browser panel. 19. The operation of the date and time controls on the Map Browser panel were modified to work correctly with reporting times that are larger than 1 day. 20. The options on the Map Query dialog were extended to allow one to identify all nodes on the map that have been assigned a particular type of external inflow (Direct, Dry Weather, RDII, or Groundwater). ----------------------- Build 5.0.009 (9/19/06) ----------------------- Engine Updates: 1. A climate file in the user-prepared format will no longer be confused with one using the Canadian format (see climate.c). 2. The minimum runoff which can generate pollutant washoff was changed from 0.001 in/hr to 0.001 cfs (see subcatch.c). 3. A new RDII event now begins when the duration of a continuous run of dry weather exceeds the base time of the longest unit hydrograph rather than arbitrarily being set at 12 hours (see rdii.c). 4. Problems with dynamic flow routing through long force mains connected to Type 3 and Type 4 pumps have been corrected (see dynwave.c and link.c). GUI Updates: 1. A problem in displaying profile plots when all elevations are below zero has been corrected. ---------------------- Build 5.0.008 (7/5/06) ---------------------- Engine Updates: 1. The conversion from the Horton infiltration drying time input parameter to an equivalent regeneration curve constant was corrected. 2. Pipe invert elevations at outfalls are now measured relative to the outfall stage elevation rather than the outfall's invert elevation. 3. Entrance/exit minor loss terms for dynamic wave flow routing are now adjusted by the ratio of the mid-point to entrance/exit areas to improve the energy balance. 4. A possible error in computing flow depth from head when checking the normal flow limitation based on the Froude number for dynamic wave flow routing was corrected. 5. A potential problem with converting the units of rainfall read from an external file was corrected. 6. The equivalent length of orifices and weirs was changed from being a minimum of 200 ft to a maximum of 200 ft. 7. Problems in displaying washoff mass balance results for pollutants expressed as Counts/Liter were fixed. 8. The reporting of total system maximum runoff rate in the Status Report's Subcatchment Runoff Summary table has been corrected. 9. The subcatchment pollutant washoff process was reprogrammed to provide more rigorous mass balance results for the case where runoff from one subcatchment is routed over another subcatchment or when there is direct deposition from rainfall. 10. Checks for non-negative conduit offsets and orifice/ weir/outlet heights have been added. 11. A constant value and a scaling factor have been added to Direct External inflows. See the Inflows Editor - Direct Page topic in the Help file for more details. 12. A listing of total washoff loads for each pollutant for each subcatchment has been added to the Status Report. 13. A new summary table of Node Inflows and Flooding has been added to the Status Report. 14. A new summary table of Outfall flows and pollutant loads has been added to the Status Report. 15. The 5.0.006 Engine Update #12 has been revoked. GUI Updates: 1. The Inflows Editor was modified to accommodate the baseline and scaling parameters added to direct external inflows. 2. The .INI file that saves a user's program preferences is now saved to the user's home directory rather than the SWMM installation directory. 3. The Select All command was extended to apply to the Status Report display. 4. A new text file viewer component was used for the Status Report to speed up the display of the report's contents. 5. A formating error on the Horizontal Axis page of the Graph Options dialog form was corrected. This required making changes to the custom Chart Dialog component that is included with the GUI's source code. 6. Some cosmetic changes were made to the look of Tabular reports. 7. Type 3 pump curves (head v. flow) are now displayed with head on the vertical axis and flow on the horizontal axis when the View option is selected in the Curve Editor dialog. ----------------------- Build 5.0.007 (3/10/06) ----------------------- Engine Updates: 1. An "Ignore Rainfall" analysis option was added that causes the program to only consider user-supplied external inflow time series and dry weather flows and ignore any rainfall inputs that would otherwise produce runoff. 2. The hydraulic radius calculations for Rectangular-Closed, Rectangular-Triangular, and Rectangular-Round conduit shapes were modified to account for the increase in wetted perimeter that occurs under full flow due to the top surface. 3. Refinements were made in several places in the code that need to distinguish between Full Flow and Maximum Flow conditions in closed conduits. 4. The code now properly accounts for the case where the depth at which the maximum normal flow occurs through an irregular shaped cross section is less than the full depth. 5. The final volume of any ponded water (caused by node flooding) is now included in the reported flow continuity error. 6. Peak runoff flow was added to the Subcatchment Summary table in the Status Report. 7. Non-conduit links are now included in the Link Flow Summary table of the Status Report. GUI Updates: 1. The Maximum Depth field in the Property Editor for a conduit with an irregular shape now shows the correct value for any set of transect elevation values. 2. The "Save Profile to File" button is now enabled when the user manually adds a specified set of links to the Profile Plot dialog. 3. Link Flow Depth and Link Velocity have been added as choices for calibration variables. 4. The way that non-conduit links are displayed on profile plots was changed to avoid problems that occurred for weirs and orifices with crest heights above the node invert. 5. A problem with the way that the Group Editing function was handling the case of irregular shaped cross sections was fixed. ------------------------- Build 5.0.006a (10/19/05) ------------------------- Engine Updates: 1. The formula for snow melt rate during periods with rainfall was corrected to return its value in ft/sec rather than in/hr. 2. A problem with generating routing interface files for systems with just nodes and no links was corrected. GUI Updates: 1. Numerical precision problems in computing centroids for subcatchments with very small distances between vertices were fixed. 2. A problem with no calibration data being shown on a time series graph when some of the data were outside the range of the graph was fixed. 3. A problem with calibration data represented as dates (not elapsed time) being shifted one reporting period over in time series graphs that used elapsed time was fixed. ---------------------- Build 5.0.006 (9/5/05) ---------------------- Engine Updates: 1. A new summary table of maximum volumes and outflow rates for each storage unit has been added to the Status Report. 2. The SWMM 4 BC parameter, which specifies a minimum groundwater table elevation for groundwater flow to occur, was added as an optional groundwater flow parameter. If not provided then as before, the invert of the receiving node defines the minimum groundwater table elevation for flow to begin. 3. A new option was added to the Action clause of a control rule that allows the control setting for pumps, orifices, weirs, and outlets to be defined either by a curve (of setting versus node depth, for example) or by a time series. See the "Modulated Controls" topic in the Help file for more details. 4. The problem with interior nodes being mistaken for outfall nodes (depending on the orientation of the connecting links) under water quality analyses was fixed. 5. Geometry tables for standard size elliptical pipes were added (the standard size code number in the input file was being mistaken for an actual dimension). 6. Storage curves of area versus depth are now linearly extrapolated when a depth exceeds the table limit (as in SWMM 4) rather than just keeping the area constant. 7. Evaporation is no longer computed from a storage unit when it becomes dry. 8. In water quality routing, concentrations in storage units are now adjusted to reflect any evaporation loss over each time step. 9. It is now permissible to use the same hotstart file to both provide initial values for a run and to save the final values from a run. 10. The code was modified to be able to read evaporation values from a climate file during runs where no runoff computations are being made (previously any evaporation in such files was being ignored in data sets with no subcatchments). 11. A problem in the way that water quality was being routed through dummy conduits was fixed. 12. For pollutant treatment functions that define fractional removal in a storage unit node as a function of concentration, the concentration used is now the inflow concentration into the node (as is done for non-storage nodes), rather than the concentration in the storage unit. 13. The global first-order decay reaction assigned to specific pollutants is not applied to any storage unit that has a treatment function defined for the pollutant. 14. The total moisture available for infiltration at each time step of the runoff process now has evaporation subtracted from it before infiltration is computed. 15. Corrections were made to the way that the water volume in the upper soil zone is depeleted during dry periods under Green- Ampt infiltration. 16. A climate file is now positioned to begin reading at the start of the simulation period (rather than the start of the file) unless the user supplies a specific starting date to begin reading from the file. 17. A fatal error is now generated if the end of a climate file is reached when seeking climate data during a run (rather than just maintaining the same climate values for the remainder of the run). 18. The Node and Conduit flow statistics that appear in the Status Report are now only collected over the reporting period of the simulation, not the entire period (as would be the case when the user specifies a Report Start Date that comes after the Simulation Start Date). 19. The computation of the initial and final groundwater storage volumes used in the Groundwater Continuity table were corrected. This error only affected the continuity numbers and not the computed flows and water table levels. GUI Updates: 1. The File >> Reopen command will now list up to 10 most recently used files. 2. Map coordinates are now displayed with 3 decimal places in the Status Bar. 3. The File >> Preferences dialog now contains a "Prompt to Save Results" option. If left unchecked, simulation results will always be saved when a project file is closed and will be available for viewing the next time the project is opened. 4. A "Report Elapsed Time by Default" option was also added to the File >> Preferences dialog. If checked, then time series graphs and tables will default to using elapsed time, rather than date/time, as the time variable. This choice can always be changed in the dialog box that appears when a graph or table is first created. 5. Additional reporting variables were added to the list of parameters for which Calibration Files can be used (e.g., groundwater elevation, node flooding, etc.). 6. Percent impervious was added to the list of subcatchment themes that can be viewed on the Study Area Map. 7. An Exceedance Frequency plot panel was added to the output produced when a Statistics report is generated. 8. Users can now add, delete, or re-position items in the list of links selected for a Profile Plot in the Profile Plot dialog using a new set of buttons added to the dialog. Links are added to the list by selecting the link either on the Map or from the Data Browser and then clicking the PLUS button on the dialog. 9. Profile Plots can now be generated before any simulation results are available. They include an Update button that allows one to update the plot after editing changes have been made to any nodes or links contained in the plot. 10. The Edit >> Find menu command (and its associated speed button) was split into two sub-commands, one for finding objects on the map (as before) and another for finding text within a Status Report. 11. Problems with the wrong data fields sometimes being updated in the Group Editor were fixed. 12. The Interface File Combine utility was not working at all (the format of the interface file had changed since the original code was written). This has been fixed. 13. The centroids of subcatchment polygons on the map are now computed as true centroids rather than being merely the average of the vertex coordinates. 14. The Maximum Depth property is now preserved when a storage unit is converted to a junction (by right-clicking on it and selecting Convert To from the popup menu). 15. Map and Profile Plot animation is now turned off whenever the Animator Toolbar is closed. 16. More universal support was provided for entering numerical values in scientific notation throughout the GUI's various data entry fields. 17. Display problems with zoom-ins on the preview plots of Transects, Curves, and Time Series in their respective Editor dialogs were fixed. 18. In the GUI source code: a. The custom TOpenTextFileDialog component was renamed to TOpenTxtFileDialog so as not to conflict with a Delphi 2005 component of the same name. b. The custom ChartDlg component was modified to add support for a chart axis that uses Date/Time labels. c. A new unit named Ucalib.pas was added that includes the code for reading data from Calibration Files that was previously contained in the Fgraph.pas unit. d. The Delphi DFM files for the project are now packaged as text files, not binaries, in the source code distribution. ------------------------ Build 5.0.005b (6/15/05) ------------------------ Engine Updates: 1. The end node offsets for conduits with the partly filled circular cross-section shape were not being increased to account for the depth of fill. 2. Flow through a weir was not necessarily zero when the water level on the side of the weir at higher head was zero. 3. The "crest height" for a Bottom Orifice is now interpreted as having the orifice lie in a horizontal plane the specified distance above its upstream node's invert. This allows riser outlet pipes in storage units to be simulated. GUI Updates: 1. The keyword "WEIR" was not being recognized as a legitimate type of Flow Divider node by the GUI's input data file parser. 2. The Profile Plot could display hydraulic grade lines that dropped below the invert of a conduit. ------------------------ Build 5.0.005a (5/25/05) ------------------------ Engine Updates: 1. An erroneous error message that appears when a node has multiple outflow links with one of them being an Outlet link has been fixed. GUI Updates: 1. Corrections were made for the way a Profile Plot is drawn when negative elevation values occur. ------------------------ Build 5.0.005 (5/20/05) ------------------------ Engine Updates: 1. An error in computing ponded depths at flooded nodes under Dynamic Wave flow routing was corrected. 2. The wrong lookup function was being used to find water elevations at Time Series type outfall nodes. 3. An error in interpolating values stored on a routing interface file was corrected. 4. The rainfall file reader was confusing the standard space- delimted format with other file formats. 5. A reporting error for rainfall time series that had no ending zero value was corrected. 6. A problem with neglecting to compute a snowmelt coefficient for pervious areas was fixed. 7. The keyword for specifying that pollutant buildup be normalized to curb length was modified to accept either CURB or CURBLENGTH. 8. The conversion factor the user supplies for external pollutant mass inflows must now convert time series values into mass concentration units per second (e.g., 5.25 will convert from lbs/ day to mg/sec). Flow units are no longer part of the conversion. 9. The ratio of maximum to design flow listed for each conduit in the status report was corrected to account for the number of barrels included in the conduit. 10. The minimum elevation change applied to a flat conduit was changed to 0.001 feet, as used in SWMM 4. 11. The maximum depth of an irregular cross-section transect is now based on the highest elevation of all stations, rather than just the higher of the first and last station, and vertical walls extending up to the higest elevation are added at the first and last station if need be. 12. The nominal width property of an irregular cross-section transect is now taken as the top width at full depth rather than the maximum width over all depths. 13. At outfalls where the user-specified water elevation is below that of a free outfall, the free outfall elevation is now used. 14. A new property, the maximum allowable flow, was added to the Conduit object. The default value is 0.0, which indicates that no maxmimum flow is prescribed. 15. Depths at outfall nodes under Steady and Kinematic Wave flow routing are now reported as the depth in the connecting conduit. 16. The calculation of the head over a non-surcharged, submerged weir was corrected to be based on the height of water above the weir crest, rather than the difference in heads on either side of the weir. 17. The equation used to reduce the length of a weir with side contractions was modified to fix a bug in SWMM 4. 18. A new water quality routing algorithm was written that produces more robust results under Dynamic Wave flow routing. 19. The Compatibility Mode option under Dynamic Wave flow routing was removed. Now there is just a single method used which has been designed to be compatible with SWMM 4 yet produce more stable results. 20. A new dynamic wave routing option was added that determines which criterion decides when conduit flow is limited to normal flow (it represents the KSUPER parameter used in SWMM 4). 21. A new flow routing option was added that allows routing calculations to be skipped during periods of steady flow which can greatly reduce the time required for continuous simulations. GUI Updates: 1. An error in reading the flapgate parameter for Weirs in an input file was corrected. 2. Having the Property Editor positioned outside the viewable screen area when the user changed the video settings to a lower resolution was corrected. 3. The Convert To option to change nodes from one type of object to another was fixed. 4. The Routing Time Step option is now entered as fractional seconds on the Analysis Options form. The older format of hrs:min:sec will still be imported correctly from previous SWMM5 input files. 5. The ability to include a startup input file on the command line that launches the GUI was added (add /f filename to the command line where filename is the fully qualified name of the input file to start with). 6. Support for output results files greater than 2 gigabytes was added. 7. The display of the hydraulic grade line in Profile Plots, and its intersection with the flow volume in conduits was improved. 8. The summary results tables contained in the Status Report were modified to display more useful information. 9. The graph options selection dialogs were made to behave more consistently. 10. Support was added for copying and printing the graphical views of curves, time series, and transects from within their respective editors. 11. The SWMM 4 flow calibration data file (Extran1.dat) distributed with the example data set Example2.inp was modified to contain the flows actually produced by SWMM version 4.4h, rather than the original numbers printed in the 1988 Extran manual. In addition, the SWMM 5.0 Users Manual and Help file were updated to reflect these changes and new additions. ------------------------ Build 5.0.004 (11/24/04) ------------------------ Engine Updates: 1. Fixes were made to the routines that identify and read data from the NCDC-formatted external rain files. 2. The sign of reported velocity in links with adverse slope was corrected. 3. Reading of results from previously saved Runoff Interface files was corrected. 4. The calculation of a regeneration rate constant from a soil drying time value for Curve Number infiltration was corrected, and the method was modified to use a constant infiltration capacity during each rain event, rather than a continuously declining capacity. 5. A correction was made to the dynamic wave routing routine for SWMM4 and SWMM3 compatibility modes that improves the match with Extran results from these earlier versions of SWMM. 6. The check for zero-sloped conduits was modified to include any conduit with elevation difference below 0.01 feet. 7. The computation of the ponded depth at flooded nodes under dynamic wave flow routing was corrected. 8. A check was added to make sure that the reporting time step is not longer than the run duration. 9. Surcharged and high Froude number conduits were previously excluded from consideration when computing a variable time step for dynamic wave routing; they are now included. 10. The code numbers for the concentration units used for each pollutant was added to the binary output file produced from a simulation. GUI Updates: 1. Negative values can now be entered for temperature values that appear on several input forms. 2. The input file reader now checks to make sure that the various time- of-day option values are valid. 3. A problem with copying the correct dates for a Tabular Report that is being copied to the clipboard or to a file was corrected. 4. The Graph Options dialog form was modified to display the Solid option for Style whenever a Size greater than 1 is selected. (Due to a limitation of the Graphics library used in EPA SWMM, only solid lines can be drawn at a thickness greater than 1.) ------------------------ Build 5.0.003 (11/10/04) ------------------------ Engine Updates: 1. Modifications were made to full depth entries of width tables for closed rounded cross-section shapes to improve the numerical stability for dynamic wave flow routing. 2. Error 405 was added to detect if the size of the binary results file would exceed the 2.1 Gbyte system limit. 3. A units problem for RDII inflows under metric flow units was corrected. 4. A problem reading the TEMPDIR option when it contained spaces was corrected. 5. Support for Canadian DLY02 and DLY04 temperature files was added. 6. Rule-based control of crest height for weirs was corrected (previously the control setting adjusted flow rather than the relative distance between weir crest and crown). GUI Updates: 1. A problem with the Group Editing feature for conduits was corrected (the editor would update the wrong conduit parameter). 2. Execution time for long term simulations on smaller projects was speeded up considerably by only refreshing the progress meter every day rather than every minute. 3. The time to draw time series graphs and perform statistical analyses on large data sets was considerably shortened. ----------------------- Build 5.0.002 (11/1/04) ----------------------- Engine Updates 1. Modifications made to the Picard method used for dynamic wave flow routing routine. ------------------------ Build 5.0.001 (10/29/04) ------------------------ First official release of SWMM 5.
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