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Chinese Agricultural Science Bulletin ›› 2016, Vol. 32 ›› Issue (15): 144-149.doi: 10.11924/j.issn.1000-6850.casb15110126

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Characteristics and Variation Trend of Precipitation in Guinan Region of Gonghe Basin

  

  • Received:2015-11-25 Revised:2015-12-16 Accepted:2015-12-24 Online:2016-06-01 Published:2016-06-01

Abstract: The paper aims to grasp the change rules of atmospheric precipitation in Guinan region of Gonghe Basin, Qinghai Province, and provide a reference for rational utilization of precipitation resource. Based on the monthly precipitation data from Guinan weather station from 1961 to 2010, the variation characteristics and trend of precipitation in Guinan region were analyzed. The changes were examined by methods of Mannkendall test and moving t-test. The results indicated that the precipitation had a weak increasing trend in recent 50 years, the spring precipitation and winter precipitation had clear mutation points in 1963 and 1971, the annual precipitation began to decline from 1976, but ascended from 2004, the spring precipitation, summer precipitation and the flood period precipitation had a clear rise in 1982, 2002 and 2004.