ANALYSIS OF WATER QUALITY IN SHALLOW LAKES WITH A TWO-DIMENSIONAL FLOW-SEDIMENT MODEL |
| |
| Authors: | JI Yong ZhANG Jie YAO Qi ZHAO Di-hua |
| |
| Affiliation: | 1. Nanchang Institute of Technology, Nanchang 330099, China;2. College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China;3. Nanjing Hydraulic Research Institute, Nanjing 210098, China;1. College of Chemistry and Molecular Engineering, Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, 450001, China;2. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, 100101, China;1. College of Resources and Environmental Science, China Agricultural University, Beijing 100193, P.R. China;2. Forestry Institute, Jiangxi Agricultural University, Nanchang 330045, P.R. China;3. School of Natural Resources, University of Nebraska-Lincoln, NE 68583, USA;4. Guizhou Key Laboratory of Mountainous Climate and Resources, Guiyang 550002, P.R. China;5. Chinese Academy of Meteorological Sciences, Bejing 100081, P.R. China;1. College of Water Conservancy and Ecological Engineering, Nanchang Institute of Technology, Nanchang 330099, China;2. College of Environment, Hohai University, Nanjing 210098, China;3. JiangXi Engineering Research Center of Water Engineering Safety and Resources Efficient Utilization, Nanchang 330099, China;4. Shanghai Academy of Environmental Sciences, Shanghai 200233, China |
| |
| Abstract: | The governing equation for sediment pollutions was derived based on the turbulent diffusion of pollutants in shallow lakes. Coupled with shallow water equations, a depth-averaged 2-D flow and water quality model was developed. By means of the conservation law, a proposed differential equation for the change of sediment pollutants was linked to the 2-D equations. Under the framework of the finite volume method, the Osher approximate Riemann solver was employed to solve the equations. An analytical resolution was used to examine the model capabilities. Simulated results matched the exact solutions especially well. As an example, the simulation of CODMn in the Wuli Lake, a part of the Taihu lake, was conducted, which led to reasonable results. This study provides a new approach and a practical tool for the simulation of flow and water quality in shallow lakes. |
| |
| Keywords: | sediment falling velocity turbulence flow and water quality model finite volume method approximate Riemann solver shallow water equation advection-dispersion equation |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
|
