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<ol>
<li>Gather input data:
<ul>
<li>The applicable infiltration coefficient (q) is calculated by applying the safety factor to the [[Infiltration: Testing|measured infiltration rate]].</li>
<li>Determine the drainage catchment area (A<sub>D</sub>), and outline the location of the bioretention facility. To begin with, budget for at least 10% of the contributing impervious area to be required for the BMP. </li></li>
<li>Unless the biomedia fill material has been tested and certified otherwise, a porosity value (V<sub>r</sub>) of 0.4 may be assumed (i.e. void ratio 40%). </li>
<li>Bioretention facilities are usually between 0.5 m and 1.25 m deep, owing to construction considerations. Determine the maximum available depth (c<sub>c max</sub>) from the site constraints. The [[Infiltration]] page lists these. </li>
<li>Identify the duration (D) and intensity (i) of design storm(s). </li></ul>
<li>Calculate the required area</li>
</ol>
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<strong>[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]</strong>
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</form>
Created page with " <ol> <li>Gather input data: <ul> <li>The applicable infiltration coefficient (q) is calculated by applying the safety factor to the Infiltration: Testing|measured infiltra..."
<ol>
<li>Gather input data:
<ul>
<li>The applicable infiltration coefficient (q) is calculated by applying the safety factor to the [[Infiltration: Testing|measured infiltration rate]].</li>
<li>Determine the drainage catchment area (A<sub>D</sub>), and outline the location of the bioretention facility. To begin with, budget for at least 10% of the contributing impervious area to be required for the BMP. </li></li>
<li>Unless the biomedia fill material has been tested and certified otherwise, a porosity value (V<sub>r</sub>) of 0.4 may be assumed (i.e. void ratio 40%). </li>
<li>Bioretention facilities are usually between 0.5 m and 1.25 m deep, owing to construction considerations. Determine the maximum available depth (c<sub>c max</sub>) from the site constraints. The [[Infiltration]] page lists these. </li>
<li>Identify the duration (D) and intensity (i) of design storm(s). </li></ul>
<li>Calculate the required area</li>
</ol>
<ThirdLeft>
<panelWarning>
<strong>[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]</strong>
</panelWarning>
</ThirdLeft><TwoThirdRight></TwoThirdRight><clearFix></clearFix>
<clearFix></clearFix>
<form method="post" action="[[Media:Infiltration Sizing.xlsx]]">
<button type="success">Download .xlsx tool</button>
</form>