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Created page with "400 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/ Once the size of cistern has been determined, it can easily..."
[[File:TTT.png|400 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/]]
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.
[[category:modeling]]
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.
[[category:modeling]]