南水北调中线总干渠水力响应特征

Hydraulic response of the middle route of the South-to-North Water Diversion Project

该文针对南水北调中线工程总干渠安全运行及控制所关心的水力响应特征问题进行研究。利用南水北调中线电子渠道平台,对中线总干渠不同运行工况进行模拟计算,得到水位波动变化幅度、波动影响距离等水力响应参数的变化特征。结果表明:如无合适调控措施,参与操作的节制闸闸前后水位变化幅度大多超过0.15 m,波动影响距离在数百千米以上。对于同一节制闸,当闸门开度变化速率超过一定范围时,闸门附近水位变化速率趋近于一个定值。研究成果为南水北调中线总干渠控制运行提供了有益参考。

The hydraulic response of the middle route of the South-to-North Water Diversion Project（SNWDP） was studied to improve the operating safety.A numerical model of the middle route of the SNWDP was used to simulate different operating conditions to predict variations of the water level and influence distances.The results showed that,without appropriate control,the fluctuations of the upstream and downstream water levels at the check gate are mostly over 0.15 m and the influence distances were several hundred meters long.For the same check gate,the rate of variation of the water level near the check gate was constant when the gate opening exceeded velocity a critical value.This research provides useful reference for the control and operation of the middle route of the SNWDP.