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|Title:||Design of sediment trap at Rollover Pass, Texas|
|Authors:||Parchure, Trimbak M. (Trimbak Mukund), 1943-|
McAdory, Robert T.
|Publisher:||Coastal and Hydraulics Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||ERDC/CHL TR ; 00-23.|
Rollover Pass is a narrow manmade channel, which connects the Gulf of Mexico and Rollover Bay. The Gulf Intracoastal Water Way (GIWW) crosses the Rollover Bay on the north side of Rollover Pass. The U.S. Army Engineer District, Galveston, maintains a navigation channel, 38 m (125 feet) wide and 3.6 m (12 feet) deep within the GIWW for commercial barge traffic. Over the past several years considerable siltation has been taking place within the GIWW in the vicinity of the Rollover Pass area and periodic dredging is required for maintaining navigable depths. The objective of the study was to construct a working numerical model of the Rollover Pass area, and to use the model for design of a sediment trap, which will be feasible and effective in reducing the frequency of dredging in the GIWW. The hydrodynamic model code RMA2, available at ERDC-CHL, was used to calculate the hydrodynamics of the system with a two- dimensional numerical model. The model was verified using field data. Velocity patterns under selected tidal conditions were generated. Computation and analysis of bed shear stress patterns were used along with the velocity data to estimate where and by how much sediment deposition is expected to occur. Several alternatives of sediment trap in terms of location, shape, size and depth were considered for evaluation.
|Appears in Collections:||Technical Report|