Line 3: |
Line 3: |
| 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. | | 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: | | In a typical configuration: |
| *The catchment (roof) would be 100% impervious
| | {|class="mw-collapsible mw-collapsed wikitable" |
| *The rainwater harvesting system would be a 'Storage' Element with the following properties:
| | |- |
| **Storage type = No removal
| | |Catchment (roof)||100% impervious |
| **Lined
| | |- |
| **Underlying soil = <em>doesn't matter, can ignore</em>
| | |colspan = 2| The rainwater harvesting system would be a 'Storage' Element with the following properties: |
| **Evaporation factor = 0
| | |- |
| **Suction head (mm) = 0
| | |Storage type||No removal |
| **Saturated conductivity (mm/hr) = 0
| | |- |
| **Initial soil moisture deficit (fraction) = 0
| | |?||Lined |
| *The dimensions of the rainwater cistern can be placed into the fields:
| | |- |
| | |Underlying soil||<em>Doesn't matter</em> |
| | |- |
| | |Evaporation factor||0 |
| | |- |
| | |Suction head (mm)||0 |
| | |- |
| | |Saturated conductivity (mm/hr)||0 |
| | |- |
| | |Initial soil moisture deficit (fraction)||0 |
| | |- |
| | |colspan = 2|The dimensions of the rainwater cistern can be placed into the fields: |
| #Bottom elevation (m) | | #Bottom elevation (m) |
| #Maximum depth (m) | | #Maximum depth (m) |
| #Initial water 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. | | #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]] | | [[category:modeling]] |