RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (Sup1): 110-115.

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ON THE RELATIONSHIP OF THE WATER DISCHARGE,SEDIMENT CONCENTRATION AND SUSPENDED SEDIMENT SIZE AT YICHANG HYDROLOGICAL STATION OF THE YANGTZE RIVER

XU Huijuan,LI Yuhong,SUN Yan   

  • Received:1900-01-01 Revised:1900-01-01 Online:2006-12-20

Abstract:

Based on the data from Yichang Hydrological Station of the Yangtze River,and the characteristics of upriver channel,the complicated relationship of water discharge,sediment concentration and suspended sediment granularity at Yichang Hydrological Station by regression analysis is carried out. After analyzing the positive correlation of the mean multiyear variations of water discharge and sediment concentration,a corresponding regression model between water discharge and sediment concentration is constructed; by studying the complicated relationship between water discharge and suspended sediment size,it is found that there existed obvious doublevalue relationship between the two parameters and the dominative influence of the hydrodynamics. The study of the annual variety of hydrological data indicates that the relationship between water discharge and sediment concentration is not satisfying,as there is no phase change of the upriver water discharge in small time scale;flood year is not always the highsediment year; water discharge and suspended sediment size presents no periodicity.

Key words: correlation, regression analysis, water discharge, sediment concentration, suspended sediment size

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