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Line 67: − <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 has some of these listed. </li> − <li>Identify the duration (D) and intensity (i) of design storm(s). </li></ul> − <li>Calculate the required area</li> − − <ThirdLeft> − <panelWarning> − <strong>[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]</strong> − </panelWarning> − </ThirdLeft><TwoThirdRight></TwoThirdRight><clearFix></clearFix> − − <clearFix></clearFix> − </ol>
→Design
<h4>Sizing</h4>
<h4>Sizing</h4>
{{:Bioretention: Sizing and modeling}}