Simulation of physical and chemical processes in reservoirs: Two case studies.

Managing water quality aspects requires the use of integrative tools that allow a holistic approach to this problem. Water quality models coupled to hydrodynamic models are these tools. This study presents the application of the water quality model WASP coupled to the hydrodynamic model DYNHYD for two distinct reservoirs: Lake Texoma and Tocoma Reservoir. Modeling the former included simulations of water velocities, water level, and four chemical and physical compounds: chlorides, dissolved oxygen (DO), biochemical oxygen demand (BOD), and total suspended solids (TSS); and validation of the results by comparing with observed values during March - May, 1997. The latter is still under project status and the simulation was performed in a prospective way. The analysis included simulations of water velocities under current and for expected conditions, DO and BOD. Both models, DYNHYD and WASP, fitted pretty well to observed conditions for Lake Texoma and for where Tocoma Reservoir has been planned. Considering management and decision support purposes, the role of boundary and loading conditions also was tested. For Lake Texoma, controlling boundary conditions for chlorides is a determinant factor for water quality of the system. However, DO and TSS in the reservoir are governed by additional process besides the condition of the boundary. Estimated loadings for this system did not provided significant effects, even though the allocation of a load for chlorides resulted in significant changes in the trend for expected chloride concentrations at the Washita River Arm of Lake Texoma. For Tocoma Reservoir, the expected concentration of DO all over the reservoir is going to driven by boundary conditions, as well as by the management of autochthonous BOD loadings provided by vegetation decomposition. These two factors will be determinant for the resulting water quality of the future reservoir.

Grantor dc:publisher

University of North Texas

Year dc:date

2005

Author dc:creator

• García Iturbe, Selma L.

Contributors dc:contributor

• Acevedo, Miguel F.
• Atkinson, Samuel F.
• Dickson, Kenneth L.
• Waller, William T.
• La Point, Thomas W., 1949-

• Water quality management -- Texoma, Lake (Okla. and Tex.) -- Mathematical models.
• Water quality management -- Venezuela -- Caroní River -- Mathematical models.
• Tocoma
• chlorides
• water quality
• modeling
• WASP
• DYNHYD
• reservoir

Statement dc:rights

• Public
• Copyright
• García Iturbe, Selma L.
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 69678545
untcat: b3010309
https://digital.library.unt.edu/ark:/67531/metadc4968/
ark: ark:/67531/metadc4968

OAI identifier oai:identifier

info:ark/67531/metadc4968