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[1]LIU Xin-ping,HE Yu-hui,ZHAO Xue-yong,et al.Characteristics of Precipitation in Naiman Region of Horqin Sandy Land[J].Research of Soil and Water Conservation,2011,18(02):155-158.

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Characteristics of Precipitation in Naiman Region of Horqin Sandy Land

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 02 Page number: 155-158 Column: Public date: 2011-04-20

Title:: Characteristics of Precipitation in Naiman Region of Horqin Sandy Land

Author(s):: LIU Xin-ping^1,2, HE Yu-hui^1,2, ZHAO Xue-yong^1,2, ZHANG Tong-hui^1,2, LI Yu-lin^1,2, YUN Jian-ying^1,2; 1. Naiman Desertification Research Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (CAREERI, CAS), Lanzhou 730000, China;
2. Stress Ecophysiology and Biotechnology Laboratory, CAREERI, CAS, Lanzhou 730000, China

Keywords:: Naiman region; variation characteristic of precipitation; precipitation probability

CLC:: P426.61⁺4

DOI:: -

Abstract:: There are important ecological significance of analyzing distribution characteristics and trends of precipitation for study of regional water dynamics and rational evaluation of water resource. In the present study, the variable trends and characteristics of regional precipitation were analyzed by using 49-year precipitation data collected from Naiman Weather Bureau. The results show that the mean annual precipitation is 351.7 mm (during 1961-2009) in Naiman region. Precipitation increases in spring year by year, and decreases with years in summer, autumn and winter. Precipitation reaches maximum level in summer, which accounts for 68.6% of mean annual precipitation. Precipitation in July reaches maximum in a year, which represents 30.4% of the total annual precipitation. The proportion of year of 300～350 mm precipitation is common, and it accounts for 28.6%, while the year of annual precipitation less than mean annual precipitation accounts for 63.3%. Probability of annual precipitation more than 300 mm is 67.4%, while annual precipitation more than 351.7 mm only accounts for 38.8%. The interannual variability of precipitation is large, and the coefficient of variation is 25.1%. This indicates that total trends of precipitation decrease year by year, which shows a trend of aridization in this area.

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