受干支流回水影响的断面水位与流量关系研究

Research on relation of water level and discharge of a section area affected by backwater from trunk stream and tributary

通过对受干支流回水影响的断面水位流量关系的分析,提出受干支流回水影响的断面综合流量的概念,在此基础上,构建了断面水位与综合流量的单一关系,并进行流量推算。将该方法应用于金沙江向家坝站。结果表明:构建的水位与综合流量之间的单值关系稳定,利用该方法和实测水位可以快速准确地推求出回水影响区域的流量,可为下游的防洪调度决策提供及时有效的水位、流量信息。

Based on analysis on relation of water level and dishcharge of a section area affected by back -water from trunk stream and tributary ,the paper proposed a new concept of synthetic discharge reflecting influence of backwater from trunk stream and tributary then established a single relationship between stage and synthetic discharge .The method was applied to Xiangjiaba station in the Jinsha River basin and re-sults showed that the single relationship between stage and synthetic discharge is steady .The discharge at backwater section can be estimated promptly by the method and actual water level .The method can pro-vide timely and effective water level and discharge information for the decision of flood control and dis-patcher at lower reaches .