分水口运用引起的南水北调中线总干渠水力响应特征

Turnout-Operation-Caused Flow Transition in the Main Channel of the Middle Route of the South-to-North Water Diversion Project

大型输水渠道水力响应过程的特征参数,如渠道水位降落速率和水位波动距离等,对渠道的调度运行方式的制定有着十分重要的作用。利用南水北调中线工程电子渠道平台,对中线工程总干渠上的典型分水口的不同分流情况进行模拟分析,研究了分水口运用所引起的渠道水力响应现象,获取了水力响应过程的基本参数,为工程运行调度提供了参考。

Turnout operation always results in complicated flow transition phenomena in large-scale water transfer channels, which affects the safety of channel and the principle of flow regulation. This paper presents a simulation and analysis of flow transition phenomena caused by turn- out operation in the main channel of the Middle Route of the South-to-North Water Diversion Project （SNWDP）. Basic parameters characterizing such phenomena, including the velocity of water level descent and the upstream influencing distance of water level fluctuation, are obtained. The parameters may be useful for the design and management of the Middle Route of SNWDP.