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Line 1: − + − + − + − ===Contraindication===+ − + − *This advice also holds for [[stormwater planters]], which often experience concentrated flow from a [[downspout disconnection]] or similar. + + +
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[[File:Wood chip mulch.jpg|thumb|Pine mulch will help hold moisture in the soil]]
[[File:Wood chip mulch.jpg|thumb|Pine mulch will help hold moisture in the soil]]
*Mulch should be applied on the surface of the BMP in a layer of 75 -100 mm.
*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.
*As in other landscaping applications, the mulch helps to preserve soil moisture for plant survival, and suppresses weed growth.
*As in other landscaping applications, the mulch helps to preserve soil moisture for plant survival, and suppresses weed growth.
*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.
*Mulch can also help to maintain the organic matter content of underlying filter media, which provides cation exchange capacity for pollutant removal.
*Regular fresh applications of wood mulch can also promote denitrification, reducing nitrates in impacted surface waters.
*Regular fresh applications of wood mulch can also promote denitrification, reducing nitrates in impacted surface waters.
*Shredded hardwood mulch or pine mulch is generally recommended for LID facilities. Its fibrous texture knits together somewhat; providing limited erosion control.
*Mulch should be applied on the surface of the BMP in a layer of 75 -100 mm.
*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 instead, as these will not float. 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>
*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]]
[[Category:Green infrastructure]]