摘要
建立了非恒定河网一维水流-水质数值模型(THU-River1D),水动力模块利用最近提出的汊点水位预测-校正(junction-point water stage prediction and correction,JPWSPC)法处理缓流河网汊点处的回流效应,采用Preissmann格式离散Saint-Venant方程组,并采用Newton-Raphson方法求解非线性离散方程;水质模块采用分步法,分别求解对流项、源(汇)项、以及纵向离散项,其中,对流项处理采用改进的四阶显式Holly-Preissmann格式。模型无需特殊的河道编码,既适用于树状又适用于环状河网,还适用于潮汐流动。
A one-dimensional hydrodynamic and water quality model for river networks is developed using a newly proposed method of junction-point water stage prediction and correction（JPWSPC） for calculation of backwater effects at junctions.In the hydrodynamic module,the Saint-Venant equations are discretized with Preissmann scheme and the nonlinear equation system is solved by Newton-Raphson method.In the water quality module,an operator-splitting method is adopted to calculate the advection,source（sink） and longitudinal dispersion terms of pollutant transport equation,and the advection term is discretized with an improved explicit Holly-Preissmann scheme of fourth order.The model is applicable to river flow and tidal flows in a dentritic or looped channel networks,with no need of specific node-numbering.
出处
《水力发电学报》
EI
CSCD
北大核心
2012年第3期83-87,共5页
Journal of Hydroelectric Engineering
基金
国家水体污染控制与治理科技重大专项(2008ZX07207-010-05)
国家自然科学基金资助项目(50779026)
