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Title: Desktop study for shoaling prediction in Corpus Christi Navigation Channel, Texas
Authors: Parchure, Trimbak M. (Trimbak Mukund), 1943-
Sarruff, Soraya
Brown, Ben.
Keywords: Corpus Christi Bay
Desktop study
Navigation Channel
Numerical hydrodynamic model
Siltation estimate
Texas ports
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/CHL TR ; 01-30.
Description: Techncial report
The U.S. Army Engineer District, Galveston, has proposed deepening the Corpus Christi Navigation Channel from 13.7 m (45 ft) to 15.2 m (52 ft) from Gulf of Mexico to Viola Turning Basin in Inner Harbor and widening the channel across Corpus Christi Bay from 122 m (400 ft) to 152.4 m (500 ft). The Galveston District requested the U.S. Army Engineer Research and Development Center (ERDC) to conduct a desktop study on estimation of future shoaling in the deepened and widened Corpus Christi ship channel. The effect of adjacent disposal sites on channel shoaling needed to be included to estimate the amount of sediment from the disposal sites returning to the ship channel. The approach for the desktop study consisted of analyzing new sediment data and already available field data on currents, historic shoaling/dredging records, and surveys. Assumptions were made on the spatial and temporal variation in the values of relevant parameters. Results were obtained by running the existing numerical hydrodynamic model for a few selected conditions to determine the effect of deepening the channel on the currents in the area of interest. The effect of wind was assessed. A quantitative estimate on future shoaling in the navigation channel was provided based on the field and model data analysis. A quantitative estimate of the amount of sediment from dredged material disposal sites transported back into the navigation channel was given. The conclusions of the study were: (a) The proposed deepening of the Corpus Christi navigation channel from 13.7 m (45 ft) to 15.2 m (52 ft) and widening of the bay channel from 122 m (400 ft) to 152.4 m (500 ft) would result in increasing the average annual total shoaling from the current 1.68 million cu m (2.2 million cu yd) to about 2.3 million cu m (3 million cu yd.); (b) It is estimated that about 30 percent of sediment deposited over the placement areas on the north and south sides of the navigation channel in the Corpus Christi Bay enters back into the navigation channel.
Appears in Collections:Technical Report

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