A COUPLED MODEL OF HYDRODYNAMICS AND WATER QUALITY FOR YUQIAO RESERVOIR IN HAIHE

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A COUPLED MODEL OF HYDRODYNAMICS AND WATER QUALITY FOR YUQIAO RESERVOIR IN HAIHE RIVER BASIN

In order to simulate the characteristics of hydrodynamic field and mass transport processes in the Yuqiao Reservoir (YQR), a 2-D coupled model of hydrodynamics and water quality was developed, and the water-quality related state variables in this model included CODMn, TN and TP. The hydrodynamic model was driven by employing observed winds and daily measured flow data to simulate the seasonal water cycle of the reservoir. The simulation of the mass transport and transformation processes of CODMn, TN and TP was based on the unsteady diffusion equations, driven by observed meteorological forcing and external Ioadings, with the fluxes form the bottom of reservoir and the plant photosynthesis and respiration as internal sources and sinks. A finite volume method and Alternating Direction Implicit (ADI) scheme were used to solve these equations. The model was calibrated and verified by using the data observed from YQR in two different years. The results showed that in YQR, the wind-driven current was an important style of lake current, while the concentration of water quality item was decreasing from east to west because of the external pollutant loadings. There was a good agreement between the simulated and measured values, with the minimal calculation error percent of 0.1% and 2.6% and the mean error percent of 44.0% and 51.2% for TN and TP separately. The simulation also showed that, in YQR, the convection was the main process in estuaries of inflow river, and diffusion and biochemical processes dominate in center of reservoir. So it was necessary to build a pre-pond to reduce the external Ioadings into the reservoir.水利论文N i[}dT[r

作 者: LIU Xiao-bo PENG Wen-qi HE Guo-jian LIU Jing-ling WANG Yu-chun  
作者单位:LIU Xiao-bo(School of Environment,Beijing Normal University,Beijing 100875,China;Department of Water Environment,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)水利论文 Q F3l!~~Mk7U
PENG Wen-qi,WANG Yu-chun(Department of Water Environment,China Institute of Water Resources and Hydropower Research,Beijing 100038,China)水利论文!i*j#{ xg_f.bO
HE Guo-jian(Department of Hydraulic Engineering,State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China)水利论文,x[!|~q/Cg&^
LIU Jing-ling(School of Environment,Beijing Normal University,Beijing 100875,China) 
刊 名:水动力学研究与进展B辑  ISTIC EI
英文刊名:JOURNAL OF HYDRODYNAMICS 
年,卷(期):2008 20(5) 
分类号:TV1 
关键词:model   simulation   Yuqiao Reservoir (YQR)   wind driven current   water quality  
机标关键词:HAIHE RIVER BASINWATER QUALITYmass transportwater qualityAlternating Directionfinite volume methodhydrodynamic modelhydrodynamic fieldcoupled modelwater cycle 
基金项目:国家重点基础研究发展计划(973计划),国家自然科学基金 
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