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Comparison of Near-Field Dilutions Derived from In Situ Measurements and Simulated Dilutions at the Sand Island Sewage Outfall Plume, HI

by A. A. Petrenko,
B. H. Jones,
T. D. Dickey,
P. J. W. Roberts,



Document Type: Proceeding Paper

Part of: North American Water and Environment Congress & Destructive Water

Abstract:

Near-field dilutions of the Sand Island Treatment Plant (SITP) wastewater plume were derived from salinity measurements made at the sewage outfall between Sept. 25?Oct. 1, 1994, a period of unusual stratification of the water column. Temperature stratification and weak currents kept the plume deeply submerged. Of several methods considered for calculating dilution from in situ measurements, dilution calculated from salinity using linear interpolation of the background salinity depth profile through the plume depths was preferred. The results derived from in situ measurements were compared with dilutions simulated using the Roberts, Snyder, and Baumgartner (RSB) model. Despite the complexity of the environment, including high temporal and spatial variability of currents and temperature, the results of the model are of the same order as the values derived from in situ data.

Subject Headings: Dilution | Plumes | Field tests | Simulation models | Water treatment plants | Water stratification | Wastewater treatment plants | Hawaii | United States

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