Accession Number : ADA302182

Title :   Houston-Galveston Navigation Channels, Texas Project. Report 4. Three-Dimensional Numerical Modeling of Hydrodynamics and Salinity.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB

Personal Author(s) : Berger, R. C. ; McAdory, Robert T. ; Schmidt, Joseph H. ; Martin, William D. ; Hauck, Larry H.

PDF Url : ADA302182

Report Date : SEP 1995

Pagination or Media Count : 481

Abstract : This report describes the testing program conducted to evaluate the impact of enlargement of the Houston-Galveston Navigation Channel on the salinity and hydrodynanuc fields of tidally influenced Galveston Bay. The present channel norninal dimensions are 40 ft deep at mean low water (mlw) and 400 ft wide. The proposed enlargements tested are for a channel 45 ft deep at mlw and 530 ft wide (Phase I) and 50 ft deep and 600 ft wide (Phase II). Current plans do not include the Phase II enlargement. Salinity fields for these channel configurations and the existing channel dimensions are compared. In a separate study the results from these simulations were used to drive an ecosystem model to predict oyster production. Testing conditions included tidal conditions and winds for the year 1984. The freshwater inflows (developed outside this study) were tested for low-, medium-, and high-flow years. Additionally, since water demand in the future is expected to modify freshwater distribution and quantities, future distributions for the test year 1999 (Wallisville Dam in place), 2024. The code used (RMAlO-WES) is a Galerkin-based finite element solution to simulate three-dimensional (3-D) unsteady open-channel flow. The code represents 3-D hydrodynamics using conservation of fluid mass, horizontal momentum, and salinity/temperature transport equations subject to the hydrostatic assumption. (MM)

Descriptors :   *NAVIGATION, *DREDGED MATERIALS, *DREDGING, *CHANNELS(WATERWAYS), *OYSTERS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, WIND, HYDROLOGY, THREE DIMENSIONAL, BATHYMETRY, FRESH WATER, MASS FLOW, HYDRODYNAMIC CODES, ECOSYSTEMS, WASTE DISPOSAL, SALINITY, TEXAS, PERIODIC VARIATIONS, TIDES, ESTUARIES.

Subject Categories : Biological Oceanography
      Physical and Dynamic Oceanography
      Civil Engineering
      Underwater and Marine Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE