In this blog we example the St Venant terms used in SWMM5 as equations, table, graphs and units. We use a QA/QC version of SWMM 5 that lists many more link, node, system and Subcatchment variables than the default SWMM 5 GUI and engine. This also applies to #InfoSWMM
This help file topic contrast the St Venant Solution for InfoSWMMH2OMap SWMM 
, InfoSewer/H2OMap Sewer
and ICM/ICM SE
.
The assumptions behind Lumped and Distributed … Read the rest
How to Tell how Long Normal Flow is used in a Link in #InfoSWMM, H2OMap SWMM w/ #SWMM5
| Find the Fraction of Normal Flow Limited in the Flow Classification Table and copy it to the Link Information Table - the value of FLM can then be Displayed in a |
This blog contrasts the St Venant Solutions for InfoSewerH20Map Sewer (1), InfoSWMM/H2OMap SWMM and ICM/ICM SE.
The assumptions behind Lumped and Distributed Models along with the assumptions of the St Venant equations. InfoSewerH20Map Sewer, InfoSWMM, H2OMap SWMM, SWMM5, ICM and ICM SE … Read the rest
SWMM5 Link Upstream Weighting
Purpose: The purpose of this note is to explain a significant dynamic wave routing difference between EPA SWMM 5.0.013 and EPA SWMM 5.0.011 and before. A few people have detected a difference. The previous solution(s) would use only the midpoint area (Amid) and hydraulic radius (Rmid) … Read the rest
[vimeo 123371695 w=800 h=480]
SWMM 5 St Venant Solution - 3 Hydraulic Radius's, 5 Terms in the St Venant Equation
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 or … Read the rest
