A study of selected chemical and biological conditions of the lower Trinity River and the upper Trinity River




Baldauf, R.J.
Van Conner, J.
Holcombe, H.W.
Truesdale, F.M.

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Texas A&M University, Texas Water Resources Institute


The study was done on the site of the proposed Wallisville Reservoir, one of several multipurpose structures designed for the water development of the Trinity River Basin in Texas. The dam is to be located at Trinity River mile 3.9 where it will traverse about 22,000 acres of low salinity marsh. The completion of the Wallisville Dam is expected to alter both the character of the marsh and of the Trinity Bay portion of the Galveston Bay System. The dam will serve as an effective saltwater barrier in addition to serving as a river-water impoundment structure; about 12,500 acres of low salinity marsh will be inundated by the conservation pool. The study shows that the entire area serves as a nursery ground for white and brown shrimp, blue crab, and menhaden, and that this area will be lost to the dam site. The construction of the dam at least 4.5 miles further upstream would have spared considerable nursery acreage from destruction.


168 p.


dams, barriers, marshes, nursery grounds, impoundments, penaeid shrimp, brown shrimp