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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 4 - HYDRO-ENVIRONMENT : Dynamic, One-dimensional Water Quality Model for Gradually Varied Subcritical Flows in General Chann...
Dynamic, One-dimensional Water Quality Model for Gradually Varied Subcritical Flows in General Channel Networks
Author : Dejun Zhu , Yongcan Chen and Zhaowei Liu
The paper reports a one dimensional hydrodynamic and water quality model for river networks, in which the theory of characteristics is utilized in the hydraulic module to treat backwater effects at the junctions and treat connecting conditions at the control structures contained in the networks. The Saint-Venant equations are discretized using the Preissmann scheme, and the resulting nonlinear equation system is solved using the Newton-Raphson method. An operator-splitting method is employed to separately treat the advective, source (sink), and longitudinal dispersion terms of the pollutant transport equation in the water quality module. The advective term in the pollutant transport equation is discretized using the explicit fourth-order improved Holly-Preissmann scheme; the dispersion term and the source (sink) term are treated implicitly and explicitly respectively. The model is applicable to flows in both non-looped and looped networks, and no specific node-numbering is needed. The model is validated using an example, and the results are satisfactory, which indicates the validity of the model for hydraulic and water quality modeling in general river and channel networks.
File Size : 95,830 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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