Special Column:Celebration of the 70th Anniversary of IGSNRR, CAS

Analysis on Runoff Supply and Variation Characteristics of Aksu Drainage Basin

  • State Key Laboratory of Resource and Environment Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China

Received date: 2004-08-23

  Revised date: 2004-09-23

  Online published: 2005-02-25


Aksu River is the main tributary of the Tarim River,and its upper reaches are in the territory of Kirghizstan.According to gauging discharge of five representative hydrologic stations,this paper uses several statistical parameters to analyze both intra-annual distribution law and variation characteristics over years of different supply sources runoff.The result shows that the runoff supply of Aksu basin has the characteristics of zonal perpendicularity and diversification.The characteristics of annual discharge have close relationship with different runoff supply sources.On the one hand,intra-annual distribution of runoff is extremely uneven with high concentration degree,while on the other,the variation coefficient over years charge little with relative stable runoff volume changes.This paper applies the theory and method of wavelet analysis to perform multi-scale transformation of the annual runoff time sequence.The result reveals the annual discharge increase since 1990 in mountain area.The analysis of the influen-cing factors of precipitation and temperature indicated that the rise of temperature has greater influence on runoff increase than that of precipitation.

Cite this article

JIANG Yan, ZHOU Cheng-hu, CHENG Wei-ming . Analysis on Runoff Supply and Variation Characteristics of Aksu Drainage Basin[J]. JOURNAL OF NATURAL RESOURCES, 2005 , 20(1) : 27 -34 . DOI: 10.11849/zrzyxb.2005.01.005