河段洪峰传播时间预报的非线性演进与分段积分法

Development of Nonlinear and Integral Method for the Forecast of Travel Time of Peak Flood in River Reaches

本文考虑了洪水在河道中演朝野洪峰流量沿程的变化对流速沿程变化的非线性影响，并考虑了河段中若干支流汇入对干流洪峰传播速度的影响，将洪水分为上游型玮区间型两个大类共根据支充汇入民政部分为四个亚类，推导了各类洪水其河各站起超敬戒流量大洪水预报软件研制中的应用公式。介绍了这些公式在黄河北干流及渭河干流各站超警戒流量大洪水预报软件研制中的应用成果。

The nonliear effect of Peak flood streamwise varistion on flow speed variation is presented in this paper.The effect of tributaries inflow on peak flood travel speed is also analysed. Floods were divided into two classes,which were upstream inflow and loCal area inflow. According to tributary inflow condition,they were divided into four subclasses.The different nitegral formulas for the prediction of travel time of peak flood were obtainded. These formulas were introduced in large flood forecastins software development for the application to North Reach of the Yellow myer and reaches of the Weihe River.