Month: October 2017

Control Rules in InfoSWMM, InfoSWMM SA and #SWMM5

Control Rules

Operational control rules determine how pumps and flow regulating structures (i.e., orifice and weir) in the conveyance system will be adjusted over the course of a simulation. InfoSWMM H2OMap SWMM InfoSWMM SA has the following three control classes.

· Initial Status – The initial status editor enables specification … Read the rest

Runoff Coefficients for InfoSWMM, InfoSWMM SA, ICM and XPSWMM

Runoff Coefficients

Runoff coefficient is loosely defined as the ratio of runoff to rainfall, and is a function of watershed characteristics including land use, soil type, and slope of the watershed. The value of runoff coefficient ranges between 0.0 and 1.0. A value of 0.0 means that all of the … Read the rest

Decomposing the Corrected Flow Data for Weekend and Weekday DWF in RDII Analyst

2.5 Decomposing the Corrected Flow Data

The corrected flow data can be decomposed into its DWF, GWI, and RDII flow components with the help of the rainfall data. The decomposition process is illustrated in this section.

Determining the DWF Component

The first step towards determining the DWF component of the … Read the rest

InfoSWMM and InfoSWMM SA offer 13 choices for modeling surface runoff with Connections to Groundwater and #LIIDs

Surface Runoff in InfoSWMM and InfoSWMM SA

InfoSWMM and InfoSWMM SA offer 13 choices for modeling surface runoff (click on link to see more information on each method):

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Example 5. Runoff Water Quality for #SWMM5 and #InfoSWMM from the EPA Applications Manual

Example 5. Runoff Water Quality

This example demonstrates how to simulate pollutant buildup and washoff in an urban catchment. The influence of different land uses on pollutant buildup is considered and both Event Mean Concentrations (EMCs) and exponential functions are used to represent the washoff process.

Surface runoff quality is … Read the rest

Treatment in BMP’s and LID’s for #SWMM5

Treatment in BMP’s and LID’s

5.1 Treatment

Excerpt from the EPA manual Storm Water Management Model Reference Manual Volume III – Water Quality (PDF) which can be found here

5.1.1 Background

Management of stormwater quality is usually performed through a combination of so-called “best management practices” (BMPs) and a form … Read the rest

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