Application of mathematical modeling to study flood wave behavior in natural rivers as function of hydraulic and hydrological parameters of the basin
Date
2010
Authors
Chagas, PatrĂcia Freire, author
Santos, Silvia Helena, author
Andrade, Carla Freitas, author
Ueta, Vanessa, author
Souza, Raimundo, author
Colorado State University, publisher
Journal Title
Journal ISSN
Volume Title
Abstract
This research concerns about the development and application of a mathematical model, based on the Saint-Venant hydrodynamic equations, to study the behavior of the propagation of a flood wave in Natural River. The model is capable of evaluating the behavior of the control variables related to the flow in terms of the hydraulic and hydrological parameters of the basin. The governing partial differential equations are solved with the aid of finite differences, and for the solution of the system of nonlinear algebraic equations the iterative Newton-Raphson algorithm is employed. A computer program QUARIGUA (Risk Quantitative Analysis of Flooding in Urban Rivers) is used to perform the simulations. To evaluate the behavior of the control variables, several scenarios for the main channel as well as for the flood waves are considered and different simulations are performed. The simulations demonstrate that roughness coefficient and bed slope of the channel play a strong game on the behavior of the flood wave propagation.
Description
2010 annual AGU hydrology days was held at Colorado State University on March 22 - March 24, 2010.
Includes bibliographical references.
Includes bibliographical references.
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Subject
flood control
hydrodynamic models
river mechanics