Category: Inside SWMM5

General Culvert Information from Innovyze H2OCalc for All Culvert Programs

General Culvert Information from Innovyze H2OCalc for All Culvert Programs

A culvert is a pipe that carries water under or through some feature (usually a road or highway) that would otherwise block the flow of water. The culvert acts as an open channel as long as the flow is partly … Read the rest

What is the minimum depth in a link of #SWMM5 ?

Introduction – the reason for these series of blogs are as an expanded view of the input, engine and output of #SWMM5 It is a companion to the EPA Documentation which I describe here:

I have noticed based on email questions and postings to the SWMM List Sever (a great

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Underdrains for LIDs, SuDs or WSuDs in #SWMM5

The reason for this blog: The following is an excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here

Underdrains are used in the following LID Controls

6.5.1 Underdrains

Underdrains are either recommended or required when the natural … Read the rest

Hydraulic Jump, Froude Number and #INSIDE_SWMM5

Introduction – the reason for these series of blogs are as an expanded view of the input, engine and output of #SWMM5 It is a companion to the EPA Documentation which I describe here:

I have noticed based on email questions and postings to the SWMM List Sever (a great … Read the rest

Extran Hydraulics Master from #Extran3 and #SWMM4 converted to #SWMM5

This is part of the #Inside_#SWMM5 series of blogs and is intended as a visual aid and code developer for the Storm Water Management Model Reference Manuals on https://www.epa.gov/water-research/storm-water-management-model-swmm I always think images (and some words) are best at explaining the internal working of code. I do encourage you to … Read the rest

How Do the TimeOpen and TimeClose Controls Work in #SWMM 5.1.012

This is part of the #Inside_#SWMM5 series of blogs and is intended as a visual aid and code developer for the Storm Water Management Model Reference Manuals on https://www.epa.gov/water-research/storm-water-management-model-swmm I always think images (and some words) are best at explaining the internal working of code. I do encourage you to … Read the rest

Simple SI Unit Model for SWMM5 LID with 100 mm Rainfall – Part 2

This blog is a companion to the blog post https://swmm5.org/2017/04/17/swmm5-simple-100-mm-rainfall-model-for-lid-modeling-part-1/ in which a 1 Hectare model with 100 mm of rainfall had a simple Bio-Retention Cell with no LID outflows. In part 2 of this blog series we will add a drain coefficient of 10 mm/hr (Figure 1). The internal … Read the rest

#SWMM5 Simple 100 mm Rainfall model for #LID modeling – Part 1

Simple SI Unit Model for SWMM5 LID with 100 mm Rainfall.

Reading this blog and using the embedded SWMM 5 example file, you will run a simple SI unit model based on factors of 1 and 10.

The LID (Bio-Retention Cell) is designed to have zero outflows, Figure 1,

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EPA #SWMM5 Build 5.1.012 (03/14/17) Updates

SWMM 5.1 Update History
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https://www.epa.gov/water-research/storm-water-management-model-swmm#downloads
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Build 5.1.012 (03/14/17)
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Engine Updates:

1. The direct.h header is now only #included in the swmm5.c file when
compiled for Windows. (swmm5.c)

2. Engine Update #7 in Build 5.1.011 (internally aligning the wet time
step with the reporting time step) was redacted … Read the rest

Dynamic Wave Routing Options in #InfoSWMM and #SWMM5

Dynamic Wave Routing Options

The Dynamic Wave page of the Simulation Options dialog, shown below, sets several parameters that control how the dynamic wave flow routing computations are made. These parameters have no effect for the other flow routing methods.

Contents of this simulation option dialog page are described below:… Read the rest

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