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[1]BAI Hua,MU Xing-min,GAO Peng,et al.Analysis on Spatio-temporal Variation of Precipitation and Streamflow in the Jialingjiang River Basin[J].Research of Soil and Water Conservation,2012,19(01):102-106.

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Analysis on Spatio-temporal Variation of Precipitation and Streamflow in the Jialingjiang River Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 01 Page number: 102-106 Column: Public date: 2012-02-20

Title:: Analysis on Spatio-temporal Variation of Precipitation and Streamflow in the Jialingjiang River Basin

Author(s):: BAI Hua¹, MU Xing-min^1,2, GAO Peng^1,2, WANG Fei^1,2; 1. Northwest A&F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi 712100, China

Keywords:: variation; precipitation; streamflow; Jialingjiang River Basin; human activity

CLC:: P333.5

DOI:: -

Abstract:: The differences between precipitation and streamflow can effectively represent the impact of human activities on changes of streamflow in a catchment. This study applies EOF and time series analysis method to investigate spatio-temporal variation of streamflow and precipitation based on long term hydrol-meteorological data in the Jialingjiang River Basin from 1958 to 2008. The results indicate that (1) the precipitation decreased from the southeast to the northwest in the basin and the runoff depth showed basically consistent gradient with precipitation; (2) Annual precipitation and its distribution indices do not present significant/evident trends and changing points. However, annual streamflow at Beibei station decreased significantly at 95% confidence level, and had a changing point in 1990. The wavelet analysis showed that the annual precipitation and streamflow had same periodical features (35 and 21 years). The annual streamflow showed relative drier condition compared with annual precipitation during 2002—2008. It is concluded that the natural condition, water conservation project and urbanization lead to differences of significance level between precipitation and runoff, as well as the temporal trend and changing point in the Jialingjiang River Basin.

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