以南水北调中线工程为例，建立一维应急调度数值模型，选取典型渠段作为算例，研究中线工程总干渠突发事故应急调度时输水明渠节制闸闸前目标水位的设定对渠道节制闸水位壅高、渠段退水量等参数指标的影响。研究表明：目标水位的设置直接影响到渠道退水量、渠道最高水位壅高。闸前目标水位越高，渠道水位壅高越高，但渠道退水量越小。为提高应急调度的安全经济性应在保证不发生漫顶事故的前提下，尽量加大事故上游渠段节制闸前目标水位。本研究成果可为中线工程应急预案的建立提供参考。

In this paper, we took the middle route of South-to-North Water Diversion Project as an example, and built a one-dimensional emergency dispatch numerical model of the project. On this basis, we selected some typical canal sections as cases for simulation, so as to study the impact of target water level on the canal parameters (such as water level and discharge volume) in the process of emergency dispatch. The results showed that the target water level directly affected the amount of water discharge and the highest water level before the sluice. The higher the target water level, the higher the water level rise, but the smaller the water discharge volume. To improve the safety and economy of emergency dispatch, efforts should be made to increase the target water level before the sluice as much as possible under the premise of ensuring safety. This research can provide some reference for the contingency plans of the S-N project.

国家自然科学基金项目（51509015，51309015）;长江科学院中央级公益性科研院所基本科研业务费(CKSF2016016/SL）