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
… Read the rest
Ofﬁce of Research and Development
National Risk Management
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
United States Office of Research EPA/600/R-08/010
Environmental Protection and Development January 2008
Agency Washington, DC 20460
Review of Sewer Design
Criteria and RDII Prediction
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EPA/600/R-08/010 January 2008
Review of Sewer Design Criteria and RD
Fu-hsiung (Dennis) Lai… Read the rest
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:
This method is based on empirical observations showing that infiltration decreases exponentially from … Read the rest
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
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
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
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
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
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