Development and Application of Numerical Models to Environmental Hydraulics

Author(s): Chao, X.; Zhu, T.; Jia, Y.; Altinakar, M.

Frequent natural and human activity induced disasters are influencing and degrading our water resources. To prevent and mitigate the damages that these disasters bring to our society in terms of water resources and eco-environmental quality, social and human welfare, life and property losses, and economic development, more effective and robust water resource management plans are necessary. The efforts of developing better research design and management tools have led to rapid advances in numerical modeling and computational simulation methodologies in parallel to the rapidly advancing computer technology. Computational models are effective and efficient tools that can be applied to study surface water flows, contaminant transport and environment impacts. Numerical models, CCHE2D and CCHE3D, developed at the National Center for Computational Hydroscience and Engineering of the University of Mississippi, have been applied to simulate the flow, sediment transport, pollutant distribution and water quality in natural water bodies. This paper briefly describes the CCHE2D & 3D models and demonstrate their capabilities by presenting the results of several study cases, including an oxbow lake in Mississippi, where water quality was degraded by excessive agro-chemicals, a hypothetical chemical spill case in a large lake in Mississippi, a salinity intrusion case in Lake Pontchartrain, LA, and hypothetical impact of radioactive chemicals to water quality in Kerr Reservoir and Lake Gaston, VA. The simulation results were validated using field measurements.

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