Verification of a depth-integrated sample arm as a means to reduce solids stratification bias in urban stormwater sampling
作者： William R. Selbig , Amanda Cox , Roger T. Bannerman
DOI: 10.1039/C2EM10999A
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摘要: A new water sample collection system was developed to improve representation of solids entrained in urban stormwater by integrating water-quality samples from the entire column, rather than a single, fixed point. The depth-integrated arm (DISA) better able characterize suspended-sediment concentration and particle size distribution compared fixed-point methods when tested controlled laboratory environment. Median concentrations overestimated actual 49 7% sampling column at 3- 4-points spaced vertically throughout respectively. Comparatively, only bottom pipe, 96%. sampler also showed coarser DISA which reproduce average particles over range hydraulic conditions. These results emphasize need for that integrates point properly pipe flow.
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