A box model of Puget Sound |
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Authors: | Peter Hamilton John T Gunn Glenn A Cannon |
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Institution: | 1. Science Applications International Corporation, 4900 Water''s Edge Drive, Suite 255, Raleigh, North Carolina 27606, U.S.A.;2. Science Applications International Corporation, 13400-B Northrup Way #36, Bellevue, Washington 98005, U.S.A.;3. Pacific Marine Environmental Laboratory, NOAA, 7600 Sand Point Way NE, Seattle, Washington 98115, U.S.A. |
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Abstract: | A classical two-layer box model has been used to calculate volume transports and vertical exchange coefficients for the Main Basin of Puget Sound. High river flow (January–February) and low flow (August–September) calculations, using salinity and runoff observations, show that basically two estuarine types exist within the basin under both flow conditions. Admiralty Inlet, the north entrance to the Main Basin, is similar to a partially mixed estuary with vigorous tidal mixing, so that horizontal and vertical salinity gradients are similar in winter and late summer. Within the deep main basin, two layer transports are proportional to salinity stratification and the vertical exchanges are low. Calculated summer transports are about a factor of two smaller than winter transports for the Main Basin. Model transports agree quite well with daily net transports estimated from current meters. Flushing times calculated by the model also agree with volume replacement times calculated using current meter data and by methods using oxygen deficits in the lower layer. |
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Keywords: | estuarine circulation box model residence time salinity stratification transport Puget Sound |
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