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| Figure 3. Model comparison of summer near-surface (2-m depth) effluent concentrations at the existing sewage outfalls and of summer middepth (16-m depth) concentrations at the new outfall. At the new outfall location, effluent is trapped at middepth during the summer beneath the warm surface layer, while effluent from the existing outfalls remains near the surface. The areal extent of high effluent concentration at the new outfall is smaller, as in winter (see fig. 2), than at the existing outfalls. In addition, because nutrients from the new outfall are trapped in waters that are already nutrient rich, the impact of sewage-borne nutrients is decreased. |
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U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/fs/fs185-97/figures/fig3.html
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