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龙口流速和单宽功率是衡量截流困难度的两个重要指标，了解其变化规律对截流设计和施工都有极大的意义。本文从两个戗堤在截流中的作用出发，以落差分配为控制条件，通过理论分析，并结合模型试验。对整个截流过程中两个龙口的流速和单宽功率的变化规律进行了较为深入的研究，首次对双戗堤上堵进占截流两参数的变化进行了全面的阐述，为双戗堤上堵进占截流的实施提供了可靠的判断依据。
Longkou flow rate and single-width power is a measure of the difficulty of intercepting two important indicators to understand the changing rules of interception design and construction are of great significance. Based on the role of two embankments in the river closure, this paper takes the gap assignment as the control condition, through theoretical analysis and model test. The changes of flow rate and single-width power of two longkou in the whole river closure process are studied in depth. The changes of the two parameters of block river closure on the double riverbed embankment for the first time are expounded comprehensively, The implementation of closure provides a reliable basis for judgment.