Note: How to Search These Blogs for Information
In each of the blogs search for a term or a set of terms using the search button. For example, here is http://swmm5.blogspot.com with a search for venant
An equivalent Search in http://www.swmm2000.com
An equivalent Search in http://swmm5.org/
An equivalent Search in … Read the rest
Subject: Link Simulated Parameters used in either the Normal Flow or St Venant Equation of SWMM 5
St. Venant equation – this is the link attribute data used when the St. Venant Equation is used in SWMM 5. Simulated Parameters from the upstream, midpoint and downstream sections … Read the rest
Note: Four cross sectional areas are used in a link of SWMM 5. The weighted hydraulic radius (Rwtd) is a function of the Froude Number of the link and the upstream and downstream hydraulic radius. The Rwtd value is used in the computation of the friction slope … Read the rest
Note: An explanation of the four St. Venant Terms in SWMM 5 and how they change for 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
The Three Flows in SWMM 5 for a Link
There are actually three flows computed or used for a link in SWMM 5:
1. The St. Venant Flow equation flow
2. The Upstream Normal Flow Manning’s equation based on the link roughness, slope, upstream cross sectional area and upstream … Read the rest
Subject: What are the Units for the five St. Venant Flow Terms in SWMM 5 and InfoSWMM?
The new flow (Q) calculated at during each iteration of time step as
(1) Q for the new iteration = (Q at the Old Time Step – DQ2 + DQ3 + … Read the rest