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| <ul>
| | [[File:Wood chip mulch.jpg|thumb|Pine mulch will help hold moisture in the soil]] |
| <li>Mulch should be applied on the surface of the BMP in a layer of 75 -100 mm. </li>
| | *Mulch is considered to be an normal finishing touch to many types of formal landscaping. Maintaining mulch application can help increase aesthetic value of LID BMPs. |
| <li>As in other landscaping applications, the mulch helps to preserve soil moisture for plant survival, and suppresses weed growth.</li>
| | *As in other landscaping applications, the mulch helps to preserve soil moisture for plant survival, and suppresses weed growth. |
| <li>Mulch is considered to be an normal finishing touch to many types of formal landscaping. Maintaining mulch application can help increase aesthetic value of LID BMPs.</li>
| | *Mulch can also help to maintain the organic matter content of underlying filter media, which provides cation exchange capacity for pollutant removal. |
| <li>Shredded hardwood mulch is recommended for LID facilities. Its fibrous texture knits together somewhat; providing erosion control on the surface. </li>
| | *Regular fresh applications of wood mulch can also promote denitrification, reducing nitrates in impacted surface waters. |
| <li>Regular fresh applications of wood mulch also promotes denitrification, reducing nitrates in impacted surface waters. </li>
| | *Mulch should be applied on the surface of the BMP in a layer of 75 -100 mm. |
| </ul> | | *Double-shredded hardwood or softwood mulch is recommended for LID facilities. Its fibrous texture knits together somewhat; providing limited erosion control. |
| | *In areas with particularly high flow (e.g. around [[inlets]] and [[forebays]]) coarse decorative aggregate or [[stone]] is recommended to better dissipate energy and protect it from erosion. |
| | *This advice also holds for [[stormwater planters]], which often experience concentrated flow from a [[downspout disconnection| roof downspout or drain]]. |
| | *All organic mulches have the potential to float and migrate in surface flow, particularly after a previously dry period. <ref> Simcock, R and Dando, J. 2013. Mulch specification for stormwater bioretention devices. Prepared by Landcare Research New Zealand Ltd for Auckland Council. Auckland Council technical report, TR2013/056 </ref> |
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| [[Category:Materials]] | | [[Category:Materials]] |
| | [[Category:Green infrastructure]] |