"At the Summit of Olympus Mons
Credit: G. Neukum (FU Berlin) et al., DLR, ESA
From martian orbit, the Mars Express cameras looked down on the largest volcano in the solar system. The result was this stunningly detailed overhead view of the…"
SWMM5 - Stormwater Management Model
SWMM 5, InfoSWMM, H20MAP SWMM, InfoSewer for Water Quality,Hydrology, Hydraulics
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Robert Dickinson replied to Robert Dickinson's discussion How is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5?"Subject: Link Iterations in the SWMM 5 Dynamic Wave Solution
Each of the links in the SWMM 5 network can use up to 8 iterations to reach convergence during a time step in the dynamic wave solution of SWMM 5. The rules…"
Robert Dickinson left a comment for wu ze jian"Hi, I added this discussion http://swmm2000.com/forum/topics/how-is-the-st-venant-equation-solved-for-in-the-dynamic-wave-solu"
Robert Dickinson posted a discussionHow is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5?
Subject: How is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5? An explanation of the four St. Venant Terms in SWMM 5 and how they change for Gravity Mains and Force Mains. The HGL is the water surface elevation in the upstream and downstream nodes of the link. The HGL for a full link goes from the pipe crown elevation up to the rim elevation of the node + the surcharge depth of the node. The four terms are: dq2 = Time Step * Awtd * (Head Downstream – Head Upstream)…See More
Robert Dickinson added a page to the group Hydraulics
Force Main Friction Loss in InfoSWMM and the Transition from Partial to Full Flow
Subject: Force Main Friction Loss in InfoSWMM and the Transition from Partial to Full Flow
You can model Force Main friction loss in InfoSWMM using either Darcy Weisbach or Hazen Williams as the full pipe friction loss method (see Figure 1 for the…
Robert Dickinson's blog post was featuredSWMM 5 Precipitation Options
Subject: SWMM 5 Precipitation Options You can have design storms, monitored storms of any length of the time from minutes to centuries, use intensity, volume or cumulative precipitation, use both rainfall and snowfall in the same rain gage depending on temperature, use both time series or external files for the rain gage and have unlimited rain gages with the limitation of one rain gage per subcatchment. …See More
Robert Dickinson posted a blog postSWMM 5 Precipitation Options
Subject: SWMM 5 Precipitation Options You can have design storms, monitored storms of any length of the time from minutes to centuries, use intensity, volume or cumulative precipitation, use both rainfall and snowfall in the same rain gage depending on temperature, use both time series or external files for the rain gage and have unlimited rain gages with the limitation of one rain gage per subcatchment. …See More
Robert Dickinson commented on Robert Dickinson's group Stream of Information"Pacheena Indian Reserve, British Columbia, Canada
May. 25, 2012
"
Robert Dickinson commented on Robert Dickinson's group Stream of Information"All the Water on Europa Illustration Credit & Copyright: Kevin Hand (JPL/Caltech), Jack Cook (Woods Hole Oceanographic Institution), Howard Perlman (USGS)
Explanation: How much of Jupiter's moon…"
Robert Dickinson commented on Robert Dickinson's group Water Quality"URBAN STORMWATER QUANTITY/QUALITY MODELING USING THE SCS METHOD AND EMPIRICAL EQUATIONS†
http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.1997.tb04093.x/abstract
May 24, 2012
Wiley Online Library will be disrupted on 26 May from…"
Robert Dickinson commented on Robert Dickinson's group Water Quality"Hi MeHa, Here is one good source of data, I also have the SWMM 5 models for the USGS areas.
http://www.1000friendsofflorida.org/pubs/stmarksgreen/apend4.asp
http://sofia.usgs.gov/publications/ofr/78-324/ofr-78-324.pdf
"
MeHa commented on Robert Dickinson's group Water Quality"I want to model WQ of sewers. Can any body provide me a network with real measured calibration files? "
MeHa posted a status"Hello, When designing a sewer system, we consider the Node Flooding and Conduit surcharge in the status report. Is there any guideline which"
Quah Soon Tong left a comment for Esther Bergareche Auricenea"Hi Esther, I am not sure you are the same Esther that was at the United World College in South Wales with me. I am Quah Soon Tong from Singapore. I noticed you are also an engineer. I did Civil Engineering at Cambridge University, but practised as…"
Robert Dickinson commented on Robert Dickinson's group Stream of Information"River Canyon
May. 23, 2012
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Robert Dickinson commented on Robert Dickinson's group Stream of Information"Litla Dimun, Faroe Islands
May. 23, 2012
"
Upaka's Discussions
Controlling flows to storage tanks
Started this discussion. Last reply by Upaka Jan 20. 3 Replies 0 Likes
Hi,I am looking for a way of controlling flows to storage tanks.(Assuming Tank 6 as an online detention tank)I want to stop the flow from Tank 7 to Tank 6 (vis R13 orifice) once the water depth at…Continue
Writing results to an external file
Started this discussion. Last reply by Upaka Oct 13, 2011. 2 Replies 1 Like
Hi,I have linked SWMM 5.0 with an optimization module and using C++. I wanted to print some results from the simulation to an external text file. I've used the following codes, however, I can't get…Continue
Usage of control rules
Started this discussion. Last reply by Upaka Oct 10, 2011. 2 Replies 0 Likes
Hi,This is about the control rules.I am trying to simulate a network with the help of control rules.Total simulation period is 2 hrs and 30 minutes, however, I'm running the simulation part by part.…Continue
Variable for orifice height
Started this discussion. Last reply by Upaka Oct 6, 2011. 4 Replies 1 Like
Hi,I want to include a variable to the orifice height of my network and I tried to implement this through the source codes of SWMM 5.0. I am looking a particular function to do this. Please look at…Continue
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Upaka replied to Upaka's discussion Controlling flows to storage tanks
"Yeah, but what I am worrying is why the depth of the Tank 6 is not 8.51 m instead 8.26 m. "
Robert Dickinson replied to Upaka's discussion Controlling flows to storage tanks
"It seems to be working for me."
Upaka replied to Upaka's discussion Controlling flows to storage tanks
"Guess the input file is not attached well. Attached it agian"
Upaka posted a discussion
Controlling flows to storage tanks
Hi,I am looking for a way of controlling flows to storage tanks.(Assuming Tank 6 as an online detention tank)I want to stop the flow from Tank 7 to Tank 6 (vis R13 orifice) once the water depth at Tank 6 reaches to 8.26 m.Not sure that I have done it correctly using the control rules. (Since it shows me a depth of 8.51 m at…See More
Upaka replied to Upaka's discussion Writing results to an external file
"Hi, thanks a lot for the suggestion. I tried it and still got the same word printing instead of the variable values.
Then I tried with fprintf (f4, STO[0]); instead of fprintf (f4, "STO[0]"); which just gave me attached file.
Any…"
Robert Dickinson replied to Upaka's discussion Writing results to an external file
"Hi, I am fairly certain that you need to open the file f4 at the start and close it at the end. It looks like you are opening, writing one line and then closing your file. You are writing a phrase instead of a variable."
Upaka posted a discussion
Writing results to an external file
Hi,I have linked SWMM 5.0 with an optimization module and using C++. I wanted to print some results from the simulation to an external text file. I've used the following codes, however, I can't get the results printed. Instead of that I am just getting printed "STO[0]" inside the text file. Could anyone help me on this issue? float STO[100];FILE*f4;OpenSwmmOutFile("f3.out"); for(t=1; t<=1; t++){ GetSwmmResult(3, 0, 12, t, &STO[0]); f4=fopen("f4.txt", "w"); fprintf (f4,…See More
Upaka replied to Upaka's discussion Usage of control rules
"Hi Robert,
Thanks a lot for letting me know.
How should I set the water depths at nodes for a given time?
I tried the following, but it gives me an error report with "invalid keyword NODE at line ..."
RULE R1a
IF SIMULATION…"
Upaka posted a discussion
Usage of control rules
Hi,This is about the control rules.I am trying to simulate a network with the help of control rules.Total simulation period is 2 hrs and 30 minutes, however, I'm running the simulation part by part. Eg 0 to 15 minutes, 15 to 30 minutes, 30 to 45 minutes and so on.I wanted to input the state of the storage tanks, nodes, conduits of the previous simulation to the next simulation. As an example, the depth of the tank1 at 15 minutes from 0 to 15 minutes simulation should be input to the 15 to 30…See More
Upaka replied to Upaka's discussion Variable for orifice height
"Thank you very much. I will look XSECTION in detail. Thanks again."
Upaka replied to Upaka's discussion Variable for orifice height
"I am sorry, I think I didn't really explain the things. I just took an example for a subcatchment and showed the function. Likewise, I need to include a variable to the orifice height.
Let me explain the things like this. I have a…"
Upaka posted a discussion
Variable for orifice height
Hi,I want to include a variable to the orifice height of my network and I tried to implement this through the source codes of SWMM 5.0. I am looking a particular function to do this. Please look at the following example. Manning´s roughness coefficient for the pervious areas of the subcatchments. (referring "subcatch.c") Subcatch[j].subArea[PERV].N = x[1];I believe x[1] is for the Manning's coefficient. Likewise what would be the function which can be used have the height of the…See More
Upaka replied to Upaka's discussion Time varying orifice heights
"OK thanks a lot. I think I have to enter the ratio between the depth at time "T" to full depth (depth at time T / Full depth) as the setting. This then surely should be between and 1.
Thanks again. "
Robert Dickinson replied to Upaka's discussion Time varying orifice heights
"The orifice HEIGHT at any time is
Height - Link[j].xsect.yFull * Link[j].setting
where yFull is the full depth you entered and setting is the current setting based on the RTC rules (the setting is between 0 and 1)
"
Upaka replied to Upaka's discussion Time varying orifice heights
"Thanks for the reply.
You mean these opening setting are ratios?
Let's think the orifice full open height is 2 m. If I need to open it for 1.5 m, the entered number should be 1.5 / 2 = 0.75. Am I getting it correct? "
Robert Dickinson replied to Upaka's discussion Time varying orifice heights
"The orifice and weir settings can only go from 0 (fully closed) to 1 (fully open). Your error was that you orifice settings greater than 1 - make them less than 1 and it will work."
Comment Wall (1 comment)
- At 9:21am on March 16, 2010,
Robert Dickinson said… - Welcome, Upaka!
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