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The Use of SF<sub>6</sub>and GIS to Study Farfield Modeling of Ocean Outfall Plumes in Florida

Journal of Environmental Protection 2014年第11期5卷 1037-1052页

作者： Frederick Bloetscher Fernando J. Pleitez Thomas Romah Ahmed Albasri chase dickinson Husayn El Sharif Kevin Matthews Trung-Duong Nguyen Lucrece Riche Frank Youngman Thomas P. Carsey Jack Stamates John R. Proni Applied Research Center (ARC) Florida International University Miami FL USA Atlantic Oceanographic and Meteorological Laboratory Ocean Chemistry Division Miami FL USA Florida Atlantic University Civil Engineering Department Boca Raton FL USA

In June, 2004 and February, 2007, in field tracer studies were conducted on the Hollywood and South Central outfalls, using sulfur hexafluoride (SF6) as a tracer. The objective of these studies was to determine if the tracer could be detected in the farfield at significant distance, and if so, could this data be used to construct a model of the farfield plume. Prior models for farfield plume movement do not appear to comport well with the conditions in southeast Florida. Extensive research was conducted in southeast Florida on 4 outfalls, which led to the development of nearfield dilution equations for same. However farfield modeling of outfall plumes was difficult to accomplish because the tracers used are not detectable for significant distances. The SF6 resolved that problem and as a result the Hollywood outfall was used to construct a model. Two methods were investigated for modeling the plume, 1) the Eureqa formulation method and 2) the Gamma-Curve method. The concentrations in the x-y plane were first found by using the Eureqa formulation to calculate the concentration at each grid point given its depth and the concentration of the centerline at the same latitude. The plume models were generated using MATLAB that matched with the results actually seen in the field.

关键词： Ocean Outfall Treated Sewage Effluent Disposal Farfield Modeling Sulfur Hexafluoride

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