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IMPROVED PROTOCOL FOR CLASSIFICATION AND ANALYSIS OF STORMWATER-BORNE SOLIDS

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Abstract:

A large portion of water quality impaired waterways are located in or near urban areas and are adversely influenced by stormwater-borne solids. The solids have negative impacts on receiving water systems including loss of aquatic habitat, channel instability, and the transport of harmful pollutants potentially hazardous to human and ecosystem health. The current methods for sampling, handling, and analyzing stormwater solids do not lead to a good understanding of these effects on receiving waters. The purpose of this paper is to propose a consistent classification of stormwater solids and to recommend modifications to the analytical methods for determining stormwater-borne solids in order to improve assessment and monitoring protocols. Common definitions and standardized monitoring procedures are recommended to aid in understanding solid impacts and selection of stormwater best management practices. Stormwater solids should first be classified based on size into dissolved, fine, coarse and gross solids. These solids can further be classified as settleable or suspended by allowing a settling time in the analytical procedure for Total Suspended Solids. Obtaining a representative sample in the field is one of the biggest challenges in characterizing stormwater-borne solids because of temporal, geographic, and spatial variations.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864707787969324

Publication date: 2007-01-01

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