Pollution and Tidal Flushing Predictions for Oregon's Estuaries PDF Download
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Author: Byung Ho Choi
Publisher:
ISBN:
Category : Estuaries
Languages : en
Pages : 326
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Book Description
The overriding goal of this study was to provide first order estimates of dilution and tidal flushing of waste discharges released hypothetically into various Oregon estuaries during critical low flows and tides. Causal relationships between discharged wastes and subsequent estuarine response were studied. Various approaches to determine the assimilative capacity of tidal estuaries were described and applied to ten of Oregon's estuaries for which limited hydraulic flow information was available. This study mainly focused on the well-mixed condition common to most of Oregon's estuaries. The characteristics of the estuary used in the calculations were: tidal volumes, river flow, topography, and salinity information. Comparison of results from the modified tidal prism method and fraction of freshwater method for determining tidal flushing was made. Stommel's and Thomann's one-dimensional model was used to predict the spatial pollutant distribution from a waste outfall discharging into an estuary. Flushing rates in an overmixed estuary were determined using Gibson's method as well as flushing times calculation for a marina-like small basin.
Author: Byung Ho Choi
Publisher:
ISBN:
Category : Estuaries
Languages : en
Pages : 326
Get Book Here
Book Description
The overriding goal of this study was to provide first order estimates of dilution and tidal flushing of waste discharges released hypothetically into various Oregon estuaries during critical low flows and tides. Causal relationships between discharged wastes and subsequent estuarine response were studied. Various approaches to determine the assimilative capacity of tidal estuaries were described and applied to ten of Oregon's estuaries for which limited hydraulic flow information was available. This study mainly focused on the well-mixed condition common to most of Oregon's estuaries. The characteristics of the estuary used in the calculations were: tidal volumes, river flow, topography, and salinity information. Comparison of results from the modified tidal prism method and fraction of freshwater method for determining tidal flushing was made. Stommel's and Thomann's one-dimensional model was used to predict the spatial pollutant distribution from a waste outfall discharging into an estuary. Flushing rates in an overmixed estuary were determined using Gibson's method as well as flushing times calculation for a marina-like small basin.
Author:
Publisher:
ISBN:
Category : Geodesy
Languages : en
Pages : 148
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Book Description
Author: David Askren
Publisher:
ISBN:
Category : Marinas
Languages : en
Pages : 140
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Book Description
Author: Water Resources Scientific Information Center
Publisher:
ISBN:
Category : Estuaries
Languages : en
Pages : 586
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 166
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Book Description
Author:
Publisher:
ISBN:
Category : Marine resources
Languages : en
Pages : 944
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 194
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 186
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Book Description
Author:
Publisher:
ISBN:
Category : Estuaries
Languages : en
Pages : 820
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Book Description
Author: Victor Thomas Neal
Publisher:
ISBN:
Category : Columbia River Estuary (Or. and Wash.)
Languages : en
Pages : 164
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Book Description
The probable pollution distribution and flushing times have been calculated for the Columbia River Estuary, a coastal plain estuary. The pollution distribution was determined by the fresh water fraction and by the diffusion equation. The flushing times were calculated by the modified tidal prism method and by the fraction of fresh water, These methods are explained and discussed in the study. The widely varying river flow and resulting salt water intrusion were considered, as well as the varying semi-diurnal tidal range. These changing factors cause a complex variation in estuarine classification from well-mixed to stratified. The data used was taken principally from the U.S. Corps of Engineers current measurement program of 1959. The data show a stronger flow on the north side of the estuary during flood tide and a stronger flow on the south side during ebb tide. Due to this fact, the estuary was also treated as two separate channels in calculating the pollution distribution. The results of the various calculations for combinations of conditions are given in this study. A comparison of the different methods is also summarized. The estuary has been found to have a relatively short flushing time, even under low river flow conditions. The variation in strength of flow from the north side to the south side has been shown to produce pollution distributions not normally expected in an estuary.
