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May. 29, 2012
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SWMM5 - Stormwater Management Model
SWMM 5, InfoSWMM, H20MAP SWMM, InfoSewer for Water Quality,Hydrology, Hydraulics
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Robert Dickinson commented on Robert Dickinson's group Stream of Information"by jasonkillinger. Browse more data visualizations.
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Robert Dickinson added a page to the group SWMM4 Input Files
Historical SWMM 5 and SWMM 4 Engines and Examples
Subject: Historical SWMM 5 and SWMM 4 Engines and Examples
The web site has http://swmm5legacycode.ning.com/ historical SWMM 5 installs, SWMM 5 input file examples and SWMM 4 input files and engines. The SWMM 4 engines go back to SWMM 3.5…
Robert Dickinson commented on Robert Dickinson's group SWMM4 Input Files"Subject: Historical SWMM 5 and SWMM 4 Engines and Examples
The web site has http://swmm5legacycode.ning.com/ historical SWMM 5 installs, SWMM 5 input file examples and SWMM 4 input files and engines. The SWMM…"
Robert Dickinson added a page to the group Blog Links
SWMM5.NET
15 GPM
1985
1D Components in InfoSWMM 2D
3 Types of Manholes in SWMM 5 and InfoSWMM
3 Types of Subcatchment Flow in SWMM 5
A Basic InfoSewer Wet Well
A feedback loop involves four distinct stages
A rise in Pipe Inverts Across a SWMM 5 Node
A…
Robert Dickinson commented on Robert Dickinson's group Stream of Information"Udaipur, India
May. 28, 2012
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Robert Dickinson commented on Robert Dickinson's group Weather"Man-made Pollution Shifting Tropics and Sub-Tropics Poleward
"If a poleward displacement of the mid-latitude storm tracks also occurs, this will shift mid-latitude precipitation poleward, impacting regional agriculture, economy, and…"
Robert Dickinson commented on Robert Dickinson's group Weather"Poor neighborhoods have fewer trees, as these jarring satellite photos reveal.: http://www.treehugger.com/economics/how-spot-income-inequality-space-look-trees.html"
Robert Dickinson commented on Robert Dickinson's group Weather"
Climate Change is Frying Our Cities
Rising temperatures are set triple the heat-related deaths in cities across the U.S., a new report finds. Cities need to fight back."
Robert Dickinson posted a videoRSA Animate - The Power of Networks
In this new RSA Animate, Manuel Lima, senior UX design lead at Microsoft Bing, explores the power of network visualisation to help navigate our complex moder...
Robert Dickinson commented on Robert Dickinson's group ExtraVariables"Update of May, 20012
Epaswmm5.exe
swmm5.dll"
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
Simulating a "shut off" or "closed" conduit in SWMM
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Hello Members,
Though not a common practice in drainage systems, I was trying to simulate a "closed" or "shut off" pressurized conduit in SWMM5 to see the effect it would have to the performance of the whole system.
I am using an ORIFICE whereby a discharge coefficient of "0" represents a closed ORIFICE hence a closed (no fluid passing through) conduit and discharge coefficient of "1" to represent an open ORIFICE hence an open (fluid passing through) conduit.
This seems to work for a small non-looped network but when I try to apply it to a bigger network the results look not to reflect reality.
Could anyone out there be having an idea how I can do this since SWMM has no Valve objects to close and open a conduit?
Replies to This Discussion
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Permalink Reply by Robert Dickinson on -
This is not the only way to do this but it works for me, it will turn off an orifice after one hour and turn it back on after 2 hours. You do need to use the Priorities to make it work correctly. If you do not use the priorities then the orifice will turn off all of the time after 1 hour.
Rule Orf1
If SIMULATION TIME > 1.O
THEN ORIFICE OR1@82309b-15009b SETTING = 0.0
Priority 1
Rule Orf2If SIMULATION TIME > 2.O
THEN ORIFICE OR1@82309b-15009b SETTING = 1.0
Priority 2
- Attachments:
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orifice_closing_rules.INP, 48 KB
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Permalink Reply by Asaph Mercy Kabaasha on -
thanks Robert.
Robert Dickinson said:This is not the only way to do this but it works for me, it will turn off an orifice after one hour and turn it back on after 2 hours. You do need to use the Priorities to make it work correctly. If you do not use the priorities then the orifice will turn off all of the time after 1 hour.
Rule Orf1
If SIMULATION TIME > 1.O
THEN ORIFICE OR1@82309b-15009b SETTING = 0.0
Priority 1
Rule Orf2If SIMULATION TIME > 2.O
THEN ORIFICE OR1@82309b-15009b SETTING = 1.0
Priority 2
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