景洪水电站典型日运行对下游河道

介绍了景洪水电站所在地区及澜沧江流域的自然、经济条件，明确了景洪水电站以发电为主，航电结合并兼有其它综合利用效益的开发任务。以Saint-Venant方程组为基础，用Newton-Raphson方法直接求解按Preiss-mann加权四点隐式格式进行离散所得的非线性代数方程组，建立一维河网非恒定流水动力学模型。利用景洪水电站坝址至关累滩段河网枯、平、丰季的水文数据分别对模型进行了率定和验证，结果表明计算值和实测值吻合较好。对景洪水电站七种典型日运行发电方案进行非恒定流计算，得出了下游河道各断面的水位、流量过程线，为确保防洪、航运安全提供依据。

A Predictive Analysis of Effect of Typical Daily Operating Modes on Lower River Reaches of Jinghong Hydropower Station

The natural, economic conditions of J inghong Power Station locus and Lancangjiang basin were presented concisely. The multiple development purposes of Jinghong Power Station, in which electric power generation has priority, integrated with navigation and other complex utilization benefits were emphasized in this paper. The Newton--Raphson iteration method was adopted in solving the nonlinear equations obtained by discretization of Saint-Venant equations with the Preiss-mann weighted implicit four-point format. A one-dimensional unsteady channel hydrodynamics flow model was established. The representative hydrologic data during flood, mean and dry periods of the channel between the dam of the Jinghong Hydropower Station and Guanleitan were used to identify and verify the model. The simulated results agree well with the observed data. The unsteady flow of seven typical daily operating modes for Jinghong Power Station was calculated to determine the water level and flow rate at every river section downstream, which can provide references for the flood control and navigation safety.