Study On Typing And Combination Of Glacial Lake Outburst Flood And Snowmelt Flood In Yarkand River Basin

The coexistence of a variety of causes of Yarkand River flood,especially in glacial lake outburst floods more famous.This paper combines the actual investigation and study project,analysis and calculation of Yarkant River upstream flood and the characteristics of glacial lake outburst floods have a more in-depth understanding.A new approach is proposed for classification and calculation of glacial lake outburst floods and snowmelt flood.In this paper,the hydrological and meteorological data of the basin are collected,and to prepare for the necessary preparations for the analysis of runoff and flood characteristics and typing and combination of glacial lake outburst flood and snowmelt flood;Analyzed the characteristics of flood glacial lake outburst floods and snowmelt in the basin,and according to the glacial lake outburst floods occur background,put forward the criterion of glacial lake outburst floods;According to the characteristics of snowmelt flood,and the glacier lake outburst flood and snowmelt flood were calculated by using time series analysis software Eviews;According to the theory of probability,Firstly,the frequency curve of melting snow flood is discrete,Then,by the generalized results of flood glacial lake outburst floods and snowmelt combination calculation were carried on.The type of Yarkand River design flood were compared,the results show that in the P=1%~0.01% frequency,the typing results is smaller than no typing 8.6%~25.1%;When it was applied to engineering design,the design flood calculation results of typing and combination of Glacier lake outburst flood and snowmelt,can effectively reduce the design flood,reduce spillway size,reduce engineering investment.