Category: Inside SWMM5

Markdown of National Stormwater Calculator User’s Guide Manual

Note:  This is a Markdown experiment using EPA Documents and other documents that were originally PDF files, converted to DOCX files and then converted to Markdown HTML code.

EPA/600/R-13/085c | Revised September 2014 | www2.epa.gov/research

National Stormwater Calculator User’s Guide

Before After

Office of Research and Development

National Risk Management

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Markdown of A Toolbox for Sanitary Sewer Overflow Analysis and Planning (SSOAP) and Applications

A Toolbox for Sanitary Sewer Overflow Analysis and Planning (SSOAP) and Applications

Fu-hsiung Lai1, Srinivas Vallabhaneni2, Carl Chan2, Edward H. Burgess3, Richard Field1

1U.S. Environmental Protection Agency, National Risk Management Research Laboratory,

Urban Watershed Management Branch, 2890 Woodbridge Avenue (MS-104), Edison, NJ

2Camp Dresser & McKee, Inc., Indianapolis, IN

3Camp … Read the rest

Markdown version of Review of Sewer Design Criteria and RDII Prediction Methods

United States Office of Research EPA/600/R-08/010

Environmental Protection and Development January 2008

Agency Washington, DC 20460

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Review of Sewer Design

Criteria and RDII Prediction

Methods

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EPA/600/R-08/010 January 2008

Review of Sewer Design Criteria and RD

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Prediction Methods

By

Fu-hsiung (Dennis) Lai… Read the rest

Infiltration in InfoSWMM and SWMM5

Infiltration in InfoSWMM and SWMM5

Infiltration is the process of rainfall penetrating the ground surface into the soil over the pervious areas of Subcatchments.

InfoSWMM H2OMap SWMM InfoSWMM SA offers three choices for modeling infiltration:

Horton's Equation

This method is based on empirical observations showing that infiltration decreases exponentially from … Read the rest

How to Force SWMM5 to use ONLY the Wet Well area for a Pump

Problem: As SWMM5 is a link node network, the area of a Storage Node is both the area of the Wet Well and typically ½ the surface area of the connecting links. There is no surface area for the Pump(s) downstream of the Wet Well (Storage) but the area of … Read the rest

Peak Discharge: SCS Peak Discharge Method in Innovyze H2OCalc

Peak Discharge: SCS Peak Discharge Method

The dialog box for the SCS peak discharge method is shown below.

· Input for the SCS peak discharge method:

· Unit System – English or SI unit.

· Solving Target – Peak discharge or time of concentration.

· Equations – Rational method or … Read the rest

Energy Relation for Closed Conduit Flow in Innovyze H2OCalc

Energy Relation for Closed Conduit Flow

Conservation of energy involves a balance in total energy, expressed as head, between any upstream point of flow and a corresponding downstream point, including head losses caused by friction and the viscous dissipation of turbulence at bends and other appurtenances (i.e., form losses or … Read the rest

Gutter Flow in Innovyze H2OCalc

Gutter Flow

Gutters are the sections of roadway that run adjacent to the curb. Their purpose is to collect and convey surface runoff to drainage inlets and in turn to underground storm sewers. The corresponding spread of water onto the pavement, or top width of flow measured perpendicular to the … Read the rest

Pump Characteristic Curve from Innovyze H2OCalc

Pump Characteristic Curve

Pump Characteristic Curve

Pump characteristic curves are usually presented graphically describing the relationship between pump head, hp, and the flow rate, Q using either an exponential equation or 3-point quadratic form. The exponential pump characteristic curve is given as

where hc = the pump cutoff head … Read the rest

Inertia of Pumps and Motors from Innovyze H2OCalc – Idea for SWMM6

Inertia of Pumps and Motors

The combined inertia of pumps and motors driving them, including the connecting shafts and couplings, is required for transient analysis associated with the starting and stopping of pumps. The equations provided below are intended to be used as an initial guide to the inertia values … Read the rest

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