SWMM 5, InfoSWMM, H20MAP SWMM, InfoSewer for Water Quality,Hydrology, Hydraulics, 2D and RTC

Introduction

Stormwater Management Model (SWMM) Information for watershed water quality, hydrology and hydraulics modelers (not associated with the EPA)  We also cover modeling in general, InfoSWMM, InfoSewer, IWCS, IW ICM, Rainfall, Evaporation and general programming connected to the SWMM 5 program. If you enter a search word of phrase in the Custom Search Engine dialog below it will search just this site.
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All Forums

Storage Unit, No Volume Change

ModSilverberry4SWMMModelSimplified.INP Hello, For my job during the summer, I've been assigned to model a storm water pond using SWMM 5.1. My goal is to estimate the distribution of the ponds total storm water inflow at each of the pond's inlets (The pond I'm working on has 4). I intend to build a fairly high resolution model, but at the moment it is fairly simplified. I have a basic storage unit with 4 attached inlets and 4 sub-catchments which drain into the pond.  When I run the simulation I obtain a continuity error of over 18% for routing and when I look at the simulation results, specifically the depth of the pond, I see no change, even after running a 100 year storm event. This makes no sense to me as I've set the evaporation and seepage values in the storage unit to 0 AND when I look at the total inflow graph for the storage unit, I can see the expected inflow into the pond. So the pond receives an inflow, but I see no noticeable change in depth even when zooming in on the…

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2 Replies · Reply by Brent Jul 17

Pump Curve Behavior

I am new to trying to model VFD Pumps. I have a single pump running on a single type 3 curve without controls besides on-off levels. Looking at the pump operation curve, the purple diamond indicates that the pump is operating on the curve most of the time but at various time steps the red line of the curve changes so that the purple indicator is no longer riding along it. It looks like the pump is operating at the same flowrate but the curve changes. Is this a graphical error or is there something going on? I've attached screenshots fr reference. Also, what is the best way to ensure that the pump and forcemain are operating correctly according to the system curve? Thanks for any insight.

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4 Replies · Reply by Ross Volkwein Jun 27

Ave head loss in links(pipes)

i have been using SWMM 5.1 for stormwater catchment modelling. i am wondering whether f L/D  should be inputted to include head loss in pipe length as a average head loss.where f is the friction factor depending on pipe relative roughness and Reynold's number; L length of the pipe and D diameter of a pipe. so for each pipe it turns out to be different. also i am wondering how a flap works on the pipe and headloss considered due to the flap on in the pipe.

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2 Replies · Reply by Ghan Poudel Jun 11

open .out file

Hello everyone, I would like to read the .out file in a text editor created after a simulation in SWMM5. However I can't get anything readable when I open the file in notepad or some equivalent software. As I would like to combine SWMM and Matlab, I need to see and understand the structure of the .out file... Anyone knows how to do that? Thanks, Nicolas

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4 Replies · Reply by deville May 27

rainfall file

Hi users! Could you tell me what is the problem of this rainfall file? When I try to run, the report shows me ERROR 318. Below, there is an example of a rainfll file: 1     2004  01    01    00    00    0.000 1     2004  01    01    00    15    0.000 1     2004  01    01    00    30    0.000 1     2004  01    01    00    45    0.000 1     2004  01    01    01    00    0.000 1     2004  01    01    01    15    0.000 1     2004  01    01    01    30    0.000 1     2004  01    01    01    45    0.000 1     2004  01    01    02    00    0.000 1     2004  01    01    02    15    0.000 1     2004  01    01    02    30    0.000 1     2004  01    01    02    45    0.000 1     2004  01    01    03    00    0.000 1     2004  01    01    03    15    0.000 1     2004  01    01    03    30    0.000 1     2004  01    01    03    45    0.000 1     2004  01    01    04    00    0.000 1     2004  01    01    04    15    0.000 1     2004  01    01    04    30    0.000 1     2004  01    01    04   …

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1 Reply · Reply by Menna Yassin May 22

Pressurized nodes in EPA SWMM

Hello everybody! I'll like to know if is it possible to prevent flooding in nodes (no storage nodes). The problem happens when I close R-1 and R-2 completely, because C-11 reaches its maximum capacity and then N-1 begins to flood. I would like that the model were more realistic and C-5 started to reach its maximum capacity as well as SILENCIO tank fills faster. It is a distribution model thus the flow is presurized. 

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1 Reply · Reply by Robert Dickinson Jun 8

Flow on LID outputs?

Hello, This might be a simple question for some of you but I am still learning the software.... I am trying to model flow on an LID surface and wanted to ask about the outputs I can get from the software and how I can get it. Is it possible to get the dq at different time intervals? can I get the elevation of water along the x and y axis of the LID surface at a specific time step? Is there a print out or output report that has these detailed information? Thank you for your help!!!

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0 Replies

MatLab and SWMM5

open .out file

Hello everyone, I would like to read the .out file in a text editor created after a simulation in SWMM5. However I can't get anything readable when I open the file in notepad or some equivalent software. As I would like to combine SWMM and Matlab, I need to see and understand the structure of the .out file... Anyone knows how to do that? Thanks, Nicolas

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4 Replies · Reply by deville May 27

Sample code and example for link SWMM to Matlab

Hello folks, I was happy for the fact that I found this website but my excitement didnt last long! I read all of the dicussions here but I couldnt find a post which directly show me how to connect Matlab to SWMM. Yes, you do parallel processing and all of the fancy stuff with SWMM but I still don't know how call the SWMM! I may have missed something. I'm looking for a sample code to call SWMM from Matlab and do some changes to calibrate and essentially optimize the specific parameters. I think…

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0 Replies · Reply by Andres Riaño Apr 26

Re: parallel swmm and matlab

Hi Ive been running an optimization of swmm using matlab. I was hoping to use the multistart and ga algorithms in parallel mode so I could make use of a multicore PC. I havent been able to get this running  (serial optimization is ok), since parallel calls are being made to SWMM and something is being overwritten.. What Ive tried is: - rename SWMM5.exe in matlab folder to SWMM5_1,2,3 corresponding to the core no. - assign the current .inp file to the current core number - cycle through the…

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4 Replies · Reply by Dave Morgan Mar 2

editing subcatchment, node and conduit parameters using swmm5 interface commands

Hi there, I am going to edit some parameters in swmm5 input file through swmm5 interface commands. Is it possible to do that or not? I can find some commands to read results for example GetSingleResult to view simulation results for particular parameters but I can not find any commands to change some particular parameters as an new input file. I think this can be done for Epanet2 through epanet toolkit.  Please tell me if it is possible to change input file parameters (for example…

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2 Replies · Reply by yasert Mar 5, 2013

How can MATLAB change some parameters in SWMM5 inp file?

Dear all,I want to use MATLAB and SWMM5 for optimal calibration. In doing so:1) MATLAB has to generate some random values (decision variables) as inputs for SWMM5 (here is width of subcatchments2)Previous subcatchment widths replaced with New ones. So it is necessary that MATLAB reads inp file and replaces older subcatchment widths with generated values.3)SWMM5 has to run in DOS version (swmm54)MATLAB has to read rpt file and picks some result to calculate objective function5) generate other…

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7 Replies · Reply by Robert Dickinson Apr 8, 2013

linking SWMM5 GUI to MATLAB

Hi every body I want to design urban drainage system using optimization technique. Decision variable is for example ( pipe diameter).  My optimization code develops in MATLAB. How can I link MATLAB with SWMM5 so that in each iteration pipe diameters are chosen and SWMM is run. Objective function are then  determined and next iteration will be started  the same as previous iteration. I have a question about above mentioned problem: Can I link MATLAB with SWMM5 GUI or not? If yes, How? If no, is…

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28 Replies · Reply by zahra zahmatkesh Jun 28, 2013

SWMM5 Forums

Storage Unit, No Volume Change

ModSilverberry4SWMMModelSimplified.INP Hello, For my job during the summer, I've been assigned to model a storm water pond using SWMM 5.1. My goal is to estimate the distribution of the ponds total storm water inflow at each of the pond's inlets (The pond I'm working on has 4). I intend to build a fairly high resolution model, but at the moment it is fairly simplified. I have a basic storage unit with 4 attached inlets and 4 sub-catchments which drain into the pond.  When I run the simulation I…

Read more…
2 Replies · Reply by Brent Jul 17

Pressurized nodes in EPA SWMM

Hello everybody! I'll like to know if is it possible to prevent flooding in nodes (no storage nodes). The problem happens when I close R-1 and R-2 completely, because C-11 reaches its maximum capacity and then N-1 begins to flood. I would like that the model were more realistic and C-5 started to reach its maximum capacity as well as SILENCIO tank fills faster. It is a distribution model thus the flow is presurized. 

Read more…
1 Reply · Reply by Robert Dickinson Jun 8

Flow on LID outputs?

Hello, This might be a simple question for some of you but I am still learning the software.... I am trying to model flow on an LID surface and wanted to ask about the outputs I can get from the software and how I can get it. Is it possible to get the dq at different time intervals? can I get the elevation of water along the x and y axis of the LID surface at a specific time step? Is there a print out or output report that has these detailed information? Thank you for your help!!!

Read more…
0 Replies

Shape Curve Viewer

Hello everyone, I'm modeling a a simple sewer system. For that I need to define the specific geometry for each sewer of the system. However, when I introduce it, the shape curve viewer only show me the bottom half of my sewer. Is it simply a problem with the viewer or does SWMM ignore the upper half for certain a reason? I'm afraid this will have an influence on the storm water flow calculation.  In the linked picture, you can see on the right the sewer I would like to represent in SWMM and on…

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1 Reply · Reply by deville May 9

Overland Flow length computation in ArcGIS

I tried to estimate the length of overland flow using Flow Direction and Flow Length tool in ArcGIS. But the problem is that my sub catchments are mostly of rectangular shape (i.e. not he originally delineated sub watershed).  I would like to make one more point that earlier I have taken the square root of sub-catchment area to estimate the width of the catchment. I am not sure about the applicability of any of  the aforementioned method for estimating the width of the catchment,  please write…

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0 Replies

Pond design in SWMM

Dear Bob I am trying to design a pond in SWMM where I want to maintain atleast 1m depth of water before allowing the discharge from the pond. For this I have given 1m initial depth of water in the pond and kept its height as 2.5 m, but while simulating it water is depleting below 1m depth, how is it possible? What could be the error in my model setup ? Please have a look in the result.

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1 Reply · Reply by Robert Dickinson Jun 8

VARIABLE_STEP format

Hello everyone, I just started working with swwm 5.1 and I'l already stuck... I try a very simple model to understand how the software works and I can't run anything at all. Here is the example I'm working on (in fact it's simply the tutorial proposed by EPA) model.png When I try to compile it, I received the error message:   ERROR 211: invalid number 0,80 at line 31 of [OPTION] section:  VARIABLE_STEP However, no matter what I change in the option panel, I can't solve this error. It is said…

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11 Replies · Reply by Robert Dickinson Apr 15

SWMM5 Blogs

Modeling "Leaf" Gates

I am trying to determine the best way to represent "leaf" gates in SWMM5.  The gate consists of two panels that overlap each other.  The top gate serves as an overflow weir and drops as the upstream water level rises.  If the top gate is fully…

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Diversion Sturctures and SSO events in SWMM 5

I'm a new user to SWMM and i'm currently trying to model SSO events at a waste water treatment plant. I've been using dynamic routing and I've been having trouble modeling the diversion structure. Currently I have a storage node acting as a wet…

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Comments: 1

Running SWMM5 Using .bat files

Hi Robert,

I have a folder with many inp files representing different urbanization scenarios for a watershed in VA. I would like to automate the processing of this files because it is something I'll most probably will have to do…

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Comments: 1

Large data output extraction in SWMM

Hi,

I have developed a model with 33 subcatchments using 1 year hourly  rainfall data. The problem is when I try to get the runoff for all the subcatchments it says '' too many objects to display".

It would be really…

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Comments: 1

hi,

i have every 1h of total 12h rainfall time series data and run for 12h . so i got total precipitation in status report is 108 mm but when i sum up total time series is 112mm which is grater then report.

moreover when i…

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Comments: 1

thanks bob for your reply, can you tell me another issues like total precipitation in status report how it is calculated? i am using time series rainfall for 10 minute interval as intensity. total precipitation value and depth in status are not…

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Comments: 2

flood Volume in canal system

hi, how to calculate the volume spilled from
the Khals in SWMM 5.0?
can anyone help on this issue?
In Status report of SWMM, final storage volume is shown after simulation. is this value  my required value? please help on this…

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Comments: 3

Forum Categories

The Forum Categories are greatly expanded.  If you go to the Menu Item Forums you can get discussions on Matlab and DOS SWMM5, SWMM5, InfoSWMM, InfoSewer, Hydrology in SWMM5, Hydraulics in SWMM5, Water Quality and SWMM 5 LID's.  The Blogs and the Forums now have either categories of Tab Linked Searches for SWMM5,  Hydrology, LID, RDII, InfoSWMM etc.
                           SWMM 5 Forums InfoSWMM Forums
                           Hydrology Forums InfoSewer Forums
                           Hydraulics Forums Water Quality Forums

SWMM5 Forum Hydrology Forum Hydraulics Forum Hydraulics Forum Hydraulics Forum Water Quality MATLAB/DOS SWMM5 LID Forum
SWMM5 Forum Hydrology Forum Hydraulics Forum InfoWWMM Forum InfoSewer Forum Water Quality MATLAB/DOS SWMM5 LID Forum

Welcome

If you just want to read you do not need to sign in but if you want to add a discussion or blog then you need to sign in as a Ning user.  If you do not want to do either then you can send me an email to robert.dickinson@gmail.com or robert.dickinson@innovyze.com and I will do my best to answer your questions.  Thanks for visiting and I hope you found something useful! Read here for reasons you should make a profile.  

We also have a blogspot blog for SWMM5, InfoSWMM and InfoSewer which has a local and Google Search option so it is easier to find tagged information on  SWMM5.NET and the Wordpress Site SWMM5.ORG  You can also see my recent posts on Twitter and the Official Innovyze Blog which also has great information on ICM and IWCS.

New Photos

Important News about the current SWMM 5.1

Activity

Robert Dickinson left a comment for David Breton St-Jean
"Welcome david!"
Saturday
David Breton St-Jean is now a member of SWMM5 - Stormwater Management Model
Saturday
Brent replied to Brent's discussion Storage Unit, No Volume Change
"My goodness!!! Thank you so much! I was pulling my hair out trying to make it work! Ill buy ya a beer if I ever meet you!Brent"
Jul 17
Robert Dickinson left a comment for kader Jelloul
"Welcome kader!"
Jul 17
kader Jelloul is now a member of SWMM5 - Stormwater Management Model
Jul 17
Robert Dickinson replied to Brent's discussion Storage Unit, No Volume Change
"Hello Brent, I made a few changes to your model: 1. You did not have a maximum depth at the nodes, so I made then all 10 feet 2. you had a few 0.1 feet long links which was the main source of your problem - i used the option to lengthen the links au…"
Jul 17
Brent posted a discussion
Storage Unit, No Volume Change
ModSilverberry4SWMMModelSimplified.INP Hello, For my job during the summer, I've been assigned to model a storm water pond using SWMM 5.1. My goal is to estimate the distribution of the ponds total storm water inflow at each of the pond's inlets (Th…
Jul 16
Brent is now a member of SWMM5 - Stormwater Management Model
Jul 16
Robert Dickinson left a comment for Brent
"Welcome Brent!"
Jul 16
liyongkun is now a member of SWMM5 - Stormwater Management Model
Jul 11
Robert Dickinson left a comment for Eduard Forstenlechner
"Welcome Eduard!"
Jul 9
Eduard Forstenlechner replied to Robert Dickinson's discussion SWMM 5 Example Files
","
Jul 9
Eduard Forstenlechner is now a member of SWMM5 - Stormwater Management Model
Jul 9
Robert Dickinson left a comment for ty.sher
"Welcome Ty!"
Jul 8
ty.sher is now a member of SWMM5 - Stormwater Management Model
Jul 7
Robert Dickinson left a comment for qinjiawei
"Hello, You can download the code from the EPA Website which is located here http://www2.epa.gov/water-research/storm-water-management-model-swmm"
Jul 7

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