期刊
JOURNAL OF ENVIRONMENTAL ENGINEERING-ASCE
卷 138, 期 12, 页码 1186-1193出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)EE.1943-7870.0000612
关键词
Storm water; Suspended sediment; Particle size distribution; Rosin-Rammler; Stratification; Urban runoff
A new sample collection system was developed to improve the representation of sediment entrained in urban storm water by integrating water quality samples from the entire water column. The depth-integrated sampler arm (DISA) was able to mitigate sediment stratification bias in storm water, thereby improving the characterization of suspended-sediment concentration and particle size distribution at three independent study locations. Use of the DISA decreased variability, which improved statistical regression to predict particle size distribution using surrogate environmental parameters, such as precipitation depth and intensity. The performance of this statistical modeling technique was compared to results using traditional fixed-point sampling methods and was found to perform better. When environmental parameters can be used to predict particle size distributions, environmental managers have more options when characterizing concentrations, loads, and particle size distributions in urban runoff. DOI: 10.1061/(ASCE)EE.1943-7870.0000612. (C) 2012 American Society of Civil Engineers.
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