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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…"
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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…"
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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
NOT FUNCTIONING CONTROLS IN SWMM 5.0
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Hello Members,
I have a small network SWMM_EXERCISE.zip
In this network the orifice should close at 8 and open again at 10. To my surprise the controls are not picked up. What could be the problem since the control statements are well written.
Thanks in Advance.
Tags: control, statements
Replies to This Discussion
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Permalink Reply by Robert Dickinson on -
i had this result with a small change - adding greater than or equal to - it might not have worked for you if the current elapsed time was never EXACTLY equal to 8 hours.
*********************
Control Actions Taken
*********************
DEC-25-2011: 08:00:00 Link 73 setting changed to 0.00 by Control 0RULE 0
IF SIMULATION TIME >= 8:0:0
THEN ORIFICE 73 SETTING = 0.0 ;RULE 1
IF SIMULATION TIME >= 10:0:0
THEN ORIFICE 73 SETTING = 1.0 ; -
-
Permalink Reply by Asaph Mercy Kabaasha on -
great thanks. i have got the logic. i will use "Priority" for the second control to take effect also.
Robert Dickinson said:i had this result with a small change - adding greater than or equal to - it might not have worked for you if the current elapsed time was never EXACTLY equal to 8 hours.
*********************
Control Actions Taken
*********************
DEC-25-2011: 08:00:00 Link 73 setting changed to 0.00 by Control 0RULE 0
IF SIMULATION TIME >= 8:0:0
THEN ORIFICE 73 SETTING = 0.0 ;RULE 1
IF SIMULATION TIME >= 10:0:0
THEN ORIFICE 73 SETTING = 1.0 ; -
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