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[1]LIU Huiying,REN Hongyu,ZHANG Pingcang,et al.Analysis of Characteristics of Variation and Abrup Change of Precipitation in Xiangxi River Watershed over the Past 60 Years[J].Research of Soil and Water Conservation,2015,22(04):282-286.

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Analysis of Characteristics of Variation and Abrup Change of Precipitation in Xiangxi River Watershed over the Past 60 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 04 Page number: 282-286 Column: Public date: 2015-08-28

Title:: Analysis of Characteristics of Variation and Abrup Change of Precipitation in Xiangxi River Watershed over the Past 60 Years

Author(s):: LIU Huiying¹, REN Hongyu², ZHANG Pingcang², LU Xianghui¹, ZHANG Xinchuan³; 1. Nanchang Institute of Technology, Nanchang 330099, China;
2. Yangtze River Scientific Research Institute, Wuhan 430012, China;
3. Yangtze River Water Resource Protection Institute, Wuhan 430010, China

Keywords:: Xiangxi River watershed; precipitation; trend analysis; abrupt change analysis

CLC:: TV125;TV121

DOI:: -

Abstract:: The change trend of precipitation over the past 60 years in the Xiangxi River watershed was investigated using observed time series data from ten available rain gauges. Based on the ways of non-parametric trend test (linear regression,moving average method,Sen’s slope estimator and Mann-Kendall trend test), the change trend was analyzed. Mann-Kendall rank statistic test was also used to examine abrupt change for precipitation (using the 5% significance level). The results showed that precipitation had presented the decreasing trend at the rate of 0.66 mm per year in general. The precipitation in spring and autumn presented the decrease trend with the magnitude of 0.33,0.81 mm per year, respectively; while the summer precipitation increased at the rate of 0.5 mm per year. The obvious abrupt change points of annual and summer precipitation happened in the year of 1954,1989 and 2006. The abrupt change points in other three reasons are complex.

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