Evaluation of greenwaste mulch to control runoff quality from landfill sites during frequent storms

Article

Brodie, I. M. and Misra, R. K.. 2009. "Evaluation of greenwaste mulch to control runoff quality from landfill sites during frequent storms." Water, Air and Soil Pollution: an international journal of environmental pollution. 201 (1-4), pp. 75-85. https://doi.org/10.1007/s11270-008-9928-0
Article Title

Evaluation of greenwaste mulch to control runoff quality from landfill sites during frequent storms

ERA Journal ID1992
Article CategoryArticle
AuthorsBrodie, I. M. (Author) and Misra, R. K. (Author)
Journal TitleWater, Air and Soil Pollution: an international journal of environmental pollution
Journal Citation201 (1-4), pp. 75-85
Number of Pages11
Year2009
Place of PublicationLeiden, Netherlands
ISSN0049-6979
1567-7230
1573-2932
Digital Object Identifier (DOI)https://doi.org/10.1007/s11270-008-9928-0
Web Address (URL)http://www.springerlink.com/content/t157231224431206/fulltext.pdf
Abstract

This paper describes a preliminary evaluation of two types of greenwaste (fresh and aged) used as a mulch layer to control runoff from disturbed landfill areas. Fresh greenwaste refers to woody and herbaceous garden waste that has been recently collected, chopped and shredded. Aged greenwaste is greenwaste which has been stockpiled for 18 months. We used rainfall simulator tests to investigate two aspects: (1) the performance of greenwaste mulch in reducing runoff during designed storm events with a high frequency of occurrence and (2) the release of pollutants via runoff as total suspended solids (TSS) and total organic carbon (TOC) during rain. Rainfall of <5-year average recurrence interval (ARI) was generally applied, consistent with stormwater compliance requirements for many Australian landfills. TOC released from fresh greenwaste material was higher in concentration than from aged greenwaste. However when used as a 10cm-deep mulch layer, fresh greenwaste was able to completely prevent runoff, even when tested under rainfalls up to 50 year ARI duration. An equivalent mulch layer of aged greenwaste was also effective in reducing runoff volume and TSS concentration compared with the bare soil during a 3.5-year ARI rainfall, but mean TOC concentration was higher. Based on these preliminary results, fresh greenwaste mulching of bare soils is an attractive option to control runoff and erosion from areas subject to intermittent landfill operations and worthy of further investigations.

Keywordsstormwater; landfill; runoff; erosion; mulch; runoff quality; sediment control
ANZSRC Field of Research 2020400499. Chemical engineering not elsewhere classified
401199. Environmental engineering not elsewhere classified
410404. Environmental management
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Byline AffiliationsDepartment of Agricultural, Civil and Environmental Engineering
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