"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
"
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Zhao Chen's Discussions
Aquifer in SWMM 5
Started Jan 24 0 Replies 0 Likes
I am trying to use SWMM 5 to calculate the ground water flow in my model. In the aquifer portion, it's required to input conductivity slope and tension slope. Robert, would you please advice me on…Continue
surcharge flow in SWMM 5
Started this discussion. Last reply by Robert Dickinson Jan 16. 6 Replies 0 Likes
i'm trying to find out, how works the surcharge flow in SWMM 5. Another programm (like Infoworks) use preissmann slot to simulate Surcharge flow in closed coduit. which approach is accurate? Could…Continue
Aquifer in SWMM
Started this discussion. Last reply by Zhao Chen Dec 13, 2011. 2 Replies 0 Likes
does anybody here know well about Aquifer-Module in SWMM 5? which algorithms are used to model subsurface processing (aquifer)? thanksContinue
link Matlab to SWMM5
Started this discussion. Last reply by Robert Dickinson Oct 9, 2011. 2 Replies 2 Likes
i would like to link Matlab to SWMM 5 in order to automate the calculate processing (like sensibility analyze etc.). For these option must the Input and Output File be readable for Matlab. As we…Continue
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Zhao Chen posted a discussion
Aquifer in SWMM 5
I am trying to use SWMM 5 to calculate the ground water flow in my model. In the aquifer portion, it's required to input conductivity slope and tension slope. Robert, would you please advice me on how I can get these two data? thanks a lot!!See More
Robert Dickinson replied to Zhao Chen's discussion surcharge flow in SWMM 5
"Remember, there is ONE computational point in a link in SWMM 5 and one computational point at a node in SWMM 5 - the flow is from the middle of the linkl
Subject: Link Simulated Parameters used in either the Normal Flow or St Venant…"
Robert Dickinson replied to Zhao Chen's discussion surcharge flow in SWMM 5
"That is C code and not Fortran but here is the code in words:
The program will sum the value of dQ/dH for all of the links connected to the node. The value of dQ/dH is the derivative of the St Venant equation for the link.
Now, if you…"
Zhao Chen replied to Zhao Chen's discussion surcharge flow in SWMM 5
"I really want to understand this code, but I can't FORTRAN. Could you please write some easy understanding text? It is very important, because I want to do some experiments to compare surcharge flow in SWMM 5 and Preissmann slot in anorther…"
Zhao Chen replied to Zhao Chen's discussion surcharge flow in SWMM 5
"Thank you, Robert. I'm always amazed of fast replies from you. Do you kwon some report that compares approach of surcharge flow in SWMM and preissmann slot? Which method is more accurate, do you think? "
Robert Dickinson replied to Zhao Chen's discussion surcharge flow in SWMM 5
"This is how the surcharge algorithm is used in SWMM 5
Specifically look at these sections of code: // --- allow surface area from last non-surcharged condition …"
Robert Dickinson replied to Zhao Chen's discussion surcharge flow in SWMM 5
"Hi, Here is some background information
http://swmm5.blogspot.com/2011/06/3-types-of-manholes-in-swmm-5-and.html
Specifically look at these sections of code: // --- allow surface area from last non-surcharged…"
Zhao Chen posted a discussion
surcharge flow in SWMM 5
i'm trying to find out, how works the surcharge flow in SWMM 5. Another programm (like Infoworks) use preissmann slot to simulate Surcharge flow in closed coduit. which approach is accurate? Could you give me some informations about this, robert? thanks a lot!See More
Zhao Chen replied to Zhao Chen's discussion Aquifer in SWMM
"thanks a lot!
it would be better, if you can tell me, which algorithms (mathematical formula) are used to be model the aquifer in subsurface. I can only find the formula about the groundwater processing in SWMM manual but not part of aquifer.
"
Robert Dickinson replied to Zhao Chen's discussion Aquifer in SWMM
"Here is some information
SWMM 5 or 5.0 Blog: Aquifer and Groundwater Objects in SWMM 5
Nov 12, 2011
There is a Groundwater data object associated with a Subcatchment that describes flow equations, the interaction between the Subcatchment…"
Zhao Chen posted a discussion
Aquifer in SWMM
does anybody here know well about Aquifer-Module in SWMM 5? which algorithms are used to model subsurface processing (aquifer)? thanksSee More
MeHa liked Zhao Chen's discussion link Matlab to SWMM5
Robert Dickinson replied to Zhao Chen's discussion link Matlab to SWMM5
"Hi Zhao,
The DOS version of SWMM 5 makes both a text and binary output as does the SWMM 5 DLL but you can get the data output in SWMM 5 DOS by using the REPORT options - the output then shows up in the rpt file."
Zhao Chen posted a discussion
link Matlab to SWMM5
i would like to link Matlab to SWMM 5 in order to automate the calculate processing (like sensibility analyze etc.). For these option must the Input and Output File be readable for Matlab. As we known is the simulation result by SWMM 5 saved as binary file (.out). How can I change the binary file into text file or ASCII file? Are there some DOS commands to use? Thanks a lot!See More
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