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[1]ZHU Jia-jun,ZHANG Yu,TANG Ying-feng,et al.Trend Analysis on Runoff of Taohe River Main Curren[J].Research of Soil and Water Conservation,2011,18(03):110-115,120.

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Trend Analysis on Runoff of Taohe River Main Curren

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 03 Page number: 110-115,120 Column: Public date: 2011-06-20

Title:: Trend Analysis on Runoff of Taohe River Main Curren

Author(s):: ZHU Jia-jun¹, ZHANG Yu¹, TANG Ying-feng², HE Bin¹; 1. College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China;
2. Water Project Construction Cost and Fees Center, Department of Water Resources of Gansu Province, Lanzhou 730030, China

Keywords:: Tao River Basin; monthly(annual) runoff; annual distribution; annual change; empirical mode decomposition method

CLC:: P332.3

DOI:: -

Abstract:: The runoff variation is a comprehensive reflection of the changes of regional climate and the underlying surface of the earth.Understanding and awareness of its change are of great significance for the development of river resources.Based on the Taohe River basin,the upper,middle and lower reaches of the Xia-ba groove,Minxian,Lijiacun,Red flag control hydrological stations measured four months,the annual flow of information,the Taohe River runoff changes and trend were analyzed by using different indicators,and was tested by using the latest Empirical Mode Decomposition method.The results show that:From the 50s of 20th century until present,the Taohe River basin runoff is increasingly uneven distribution of low,gradually from upstream to downstream change from even to uneven.This river has large annual variation of runoff,the overall trend showed decreases,the abundant even waterless year appears alternately.Inter-annual changes in runoff of upstream and downstream of Taohe River are steady;middle reaches of some tributaries of import,inter-annual changes in runoff increased.Taohe of runoff process is corresponding with rainfall,changes in runoff varies with rainfall,and runoff always lags.

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