Regulating a Long-Distance Canal System with Floating Ice Cover in the Winter

Abstract

According to the hydraulic conditions and differences between rivers and long-distance canal systems, a juxtaposition floating ice cover model has been developed to ensure the safety of long-distance canal system operations in winter based on a flow regulation plan for canal systems and predictions of cold waves. The model can describe the ice cover formation process in the pools of each canal and the accompanying hydraulic responses and changes to the gate opening process. The model has been used to simulate the operation processes of the Jingshi canal portion of the middle route of the South-to-North Water Diversion Project in winter. The simulation results show the importance of obtaining accurate data on the ice cover roughness changing process and initial thickness, critical value of the area ice concentration upon formation, and maximization of flow velocity to ensure the juxtaposition of ice cover formation. The model can be used to determine the flow target and predict the gate operations of the canal system when a period of frigid weather is forecast.