长江宜昌-九江站间水流传播时间分析

The Flow Travel Time Analysis of Yichang Hydrologic Station and Jiujiang Hydrologic Station of Changjiang River

根据河道水流传播时间国内的研究现状,分析了影响水流传播时间的因素。研究区间是长江干流宜昌站至九江站:宜昌站作为上游研究站,三峡水库的出流控制站;九江站作为下游研究站,鄱阳湖区长江干流来水的控制站。应用相应水位法计算宜昌站-九江站水流传播时间,根据天然河道水流波的传播原理,结合三峡水库调度对水流传播时间的调控,用实测水位流量资料分析水流传播时间的变化规律。以上、下游站的洪峰水位建立相应关系,并用水力学方法计算了水流传播时间,为长江水库防汛抗旱调度提供一定的依据。

This paper summarizes the current research achievement of flow travel time in China,and analyzes the factors that affect it.The research area is from Yichang Hydrologic Station to Jiujiang Hydrologic Station of Changjiang River＇s mainstream.Yichang Hydrologic Station is an upstream research station,which is the outflow control station of the Three Gorges Reservoir.Jiujiang Hydrologic Station is a downstream research station,which is the control station of Changjiang River＇s mainstream in Poyang Lake area.This paper uses corresponding water level methods to calculate the flow travel time from Yichang Hydrologic Station to Jiujiang Hydrologic Station,by using historical data to analyze the change pattern of flood travel time,on the basis of the spread theory of natural river channel flood wave and the operation of the Three Gorges Reservoir.It also calculates the flow travel time that based the corresponding relationship of the flood peak water stage between upstream and downstream hydrologic stations and uses hydraulic method.It provides a theoretical foundation for the flood control and drought relief at the downstream.