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Line 52: − + − Once the size of cistern has been determined, it can easily be modeled in many open source and proprietary applications. For planning purposes, a RWH system could be integrated into a site plan using STEP's Treatment Train Tool. This tool provides a graphical user interface and simplified inputs on the EPA SWMM model. It is free to download, click image above. − In a typical configuration: − *The catchment (roof) would be 100% impervious − *The rainwater harvesting system would be a 'Storage' Element with the following properties: − **Storage type = No removal − **Lined − **Underlying soil = <em>doesn't matter, can ignore</em> − **Evaporation factor = 0 − **Suction head (mm) = 0 − **Saturated conductivity (mm/hr) = 0 − **Initial soil moisture deficit (fraction) = 0 − *The dimensions of the rainwater cistern can be placed into the fields: − #Bottom elevation (m) − #Maximum depth (m) − #Initial water depth (m) − #The Curves table is designed to accommodate ponds of roughly conical dimensions. A rainwater cistern is usually cuboid or cylindrical in shape, so that the area (m<sup>2</sup>) will remain the same throughout the depth. −
Rainwater harvesting: Sizing and modeling (view source)
Revision as of 01:52, 8 September 2017
, 6 years ago→STEP Treatment Train Tool
===STEP Treatment Train Tool===
===STEP Treatment Train Tool===
[[File:TTT.png|400 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/]]
[[File:TTT.png|400 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/]]
[[Rainwater harvesting: TTT]]
[[category:modeling]]