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Title: A case history of Port Mansfield Channel, Texas
Authors: Kieslich, James M.
Keywords: Inlet Hydraulics
Longshore Sediment Transport
Port Mansfield Channel, Texas
Tidal Inlets
Tidal Prism
Publisher: Coastal Engineering Research Center (U.S.) General Investigation of Tidal Inlets Research Program
Engineer Research and Development Center (U.S.)
Description: General Investigation of Tidal Inlets Report
Abstract: This report presents a case history and analysis of Port Mansfeld Channel, an artificial, jettied inlet between the Gulf of Mexico and Laguna Madre, Texas. Deposition has occurred in the channel entrance since its opening. Seaward migration of the updrift beach and shoaling in the channel entrance indicate that sand is bypassing the jettied entrance. Short-term predictions of inlet stability using the O'Brien prism-area relationship (Jarrett, 1976), Escoffier's (1940) stability criteria, and the Bruun and Gerritsen (1960) ratio of tidal prism to the gross annual longshore transport rate correctly predict the unstable nature of the channel. Tidal exchange volumes and velocities are not large enough to maintain the design cross-sectional area in the presence of the existing longshore transport.
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