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*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 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.
*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.
*Shredded hardwood mulch or pine mulch is generally recommended for LID facilities. Its fibrous texture knits together somewhat; providing limited erosion control.
*Mulch can also help to maintain the organic matter content of filter media, which provides cation exchange capacity for pollutant removal.
===Contraindication===
===Contraindication===
*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 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>