National Stormwater Calculator (SWC)
Organization
Environmental Protection Agency of the United States of America - EPA
Type(s) of Tool
Modelling ToolsSimulate economic, social, and physical systems to help planners optimize outcomes from different decisions.
Sector(s)
Water and Sanitation
Lifecycle Phase(s)
Project PlanningGeneral strategy for a project’s delivery is developed., Concept DesignTechnical experts broadly outline the project’s basic characteristics., Detailed DesignTechnical experts further elaborate the Concept Design.
Open Source
Yes
Language Availability
English
Country of Origin
USA
Description
The National Stormwater Calculator (SWC) is a web-based application tool that estimates the annual amount of rainwater and frequency of runoff from a specific site using green infrastructure as low impact development controls for small- to medium-sized locations (less than 12 acres) in the United States and Puerto Rico. The SWC is designed for use by anyone interested in reducing runoff from a property, including site developers, landscape architects, urban planners, and homeowners.
Tool Outcome
The SWC is used to inform site developers on how well they can meet a desired stormwater retention target with and without the use of green infrastructure, including different control scenarios and cost estimation.