Emergency intervention modes for ice jam events in large-scale water diversion projects

Abstract

The formation of ice jams is sudden, and they will cause abnormal water level fluctuations in water diversion projects, affecting the water supply and even causing severe flood disasters. Based on the characteristics of the Middle Route of the South-to-North Water Diversion Project, this paper uses the numerical simulation method to establish an emergency intervention effect simulation model for ice jam events. The hydraulic response characteristics of the project under gate group scheduling and taking different emergency measures are analyzed with the water level deviation and stabilization time consumption of the pool as indicators. Moreover, this paper proposes an emergency intervention mode for ice jam events. The results show that using the gate group scheduling after ice jam events will cause a sharp rise in the upstream water level of the pool where the ice jams are located. Also, compared with other emergency measures, the electric heating ice melting measure has less influence on water level, and the de-icing effect is better. Finally, the emergency intervention mode can significantly reduce the maximum water level deviation and shorten the time required to stabilize the water level. HIGHLIGHTS Reveal the hydraulic response characteristics of water diversion projects under gate group scheduling and take different emergency measures.; Establish an emergency intervention mode for ice jam events combined with gate group scheduling and emergency measures.; Propose a three-ring management mode to better promote the emergency management of ice jam events.;

Keywords

• emergency intervention
• hydraulic response characteristics
• ice jam
• middle route of the south-to-north water diversion project