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Rainwater harvesting: Sizing and modeling (view source)
Revision as of 17:30, 1 August 2017
, 6 years ago→The Treatment Train Tool
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===The Treatment Train Tool===
====The Treatment Train Tool====
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<p> Once the size of cistern has been determined, it can easily be modelled in many open source and proprietary applications. </p>
<p> Once the size of cistern has been determined, it can easily be modeled in many open source and proprietary applications. </p>
<p> In addition to the cistern size, this watershed scale modelling requires input information about draw down time. i.e. the rate of use. </p>
<p> In addition to the cistern size, this watershed scale modelling requires input information about draw down time. i.e. the rate of use. </p>
In a typical configuration:
<ul>
<li>The catchment (roof) would be 100% impervious</li>
<li>The rainwater harvesting system would be a 'Storage' Element with the following properties:</li>
<ul>
<li>Storage type = No removal</li>
<li>Lined</li>
<li>Underlying soil = <em>doesn't matter, can ignore</em></li>
<li>Evaporation factor = 0</li>
<li>Suction head (mm) = 0</li>
<li>Saturated conductivity (mm/hr) = 0</li>
<li>Initial soil moisture deficit (fraction) = 0</li>
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The dimensions of the rainwater cistern can be placed into the fields:
<ol>
<li>Bottom elevation (m)</li>
<li>Maximum depth (m)</li>
<li>Initial water depth (m)</li>
<li>The Curves table is set up 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. </li>
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[[category:modeling]]
[[category:modeling]]