Difference between revisions of "Mulch"
Jump to navigation Jump to search
|(19 intermediate revisions by 4 users not shown)|
|Line 1:||Line 1:|
Mulch be of of .
As in other landscaping applications, the mulch helps to preserve soil moisture for plant survival, and suppresses weed growth.
Mulch to of .
hardwood mulch is recommended for LID facilities. Its fibrous texture knits together somewhat; providing erosion control.
in surface . </</>
Latest revision as of 15:01, 15 July 2020
- 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.
- 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.
- 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 to better dissipate energy and protect it from erosion.
- This advice also holds for stormwater planters, which often experience concentrated flow from a roof downspout or drain.
- All organic mulches have the potential to float and migrate in surface flow, particularly after a previously dry period. 
- 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