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DTIC ADA112448: Tidal Inlet Response to Jetty Construction. |
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by Defense Technical Information Center |
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Thirteen tidal inlets located on the Atlantic, gulf, and |
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Pacific coasts of the continental United States were |
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selected for a study of the response of inlet ocean |
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entrances to manmade improvements. Inlet entrance |
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behavior following jetty construction were evaluated and |
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guidelines for the functional design of inlet entrance |
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improvements are suggested. The inlets considered in the |
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study were those where a single updrift or downdrift |
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jetty was built first. The construction of single jetties |
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at inlet entrances has resulted in migration of the |
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channel thalweg toward the jetty regardless of the inlet- |
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bay orientation, the jetty angle with the shoreline, the |
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position of the jetty relative to the direction of net |
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longshore sediment transport, the ratio of net-to-gross |
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transport, or the gross transport. In some cases, this |
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has caused undermining of the jetty. For the inlets |
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studied, the annual channel thalweg migration averaged 31 |
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percent of the total distance available for migration |
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following construction of a single updrift jetty, and 49 |
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percent of the total distance available for migration |
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following construction of a single downdrift jetty. The |
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channel cross-sectional area usually decreased following |
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construction of a single updrift jetty; the decrease in |
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area ranging up to 40 percent. Sufficient data were not |
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available to quantify channel area response following |
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construction of a single downdrift jetty. |
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Date Published: 2018-01-03 08:41:16 |
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Identifier: DTIC_ADA112448 |
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Item Size: 45668461 |
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Language: english |
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Media Type: texts |
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# Topics |
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DTIC Archive; Kieslich,James M ; ARMY... |
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