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[1]YU Min,CAO Guangchao,CAO Shengkui,et al.Analysis of Precipitation Variation Characteristics in the Southern Slope of Qilianshan Mountains in Recent 30 Years[J].Research of Soil and Water Conservation,2019,26(02):241-248.

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Analysis of Precipitation Variation Characteristics in the Southern Slope of Qilianshan Mountains in Recent 30 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 02 Page number: 241-248 Column: Public date: 2019-04-28

Title:: Analysis of Precipitation Variation Characteristics in the Southern Slope of Qilianshan Mountains in Recent 30 Years

Author(s):: YU Min^1,2, CAO Guangchao¹, CAO Shengkui^1,2, ZHANG Hang^1,2, YUAN Jie^1,2; 1. Key Laboratory of Qinghai Province Physical Geography and Environmental Process, Qinghai Normal University, Xining 810008, China;
2. College of Geographical Science, Qinghai Normal University, Xining 810008, China

Keywords:: the southern slope of Qilianshan Mountains; precipitation; variation characteristics

CLC:: P426.6

DOI:: -

Abstract:: The southern slope area of Qilianshan Mountains is an important water source conservation area in the arid area of northwest China, and its ecological status is very important. The change of precipitation is directly related to the change of water source conservation in the southern slope of Qilianshan Mountains, and can even change the ecological environment of the southern slope of Qilianshan Mountains. Therefore, it is of great social and scientific significance to study the variation characteristics of precipitation in the southern slope of Qilianshan Mountains. The characteristics of precipitation variation in the southern slope of Qilianshan Mountains was analyzed by using the data of monthly precipitation (1986—2015) of four meteorological stations in Qilian, Yeniugou, Tuole and Menyuan. The results showed that, in recent thirty years, the average annual precipitation of the Qilian, Yeniugou, Tuole and Menyuan meteorological station was 422.7 mm, 434.3 mm, 312.7 mm and 524.1 mm, respectively, the precipitation maximal values of Qilian, Yeniugou and Tuole meteorological stations occurred in 1998, which was consistent with the distribution pattern of precipitation time in China. The precipitation of each station had little change each year, and the coefficient of variation ranged from 0.14 to 0.18; the distribution of precipitation in the study area was extremely uneven during these years, and the rainfall was less from October to the next April, but more from May to September. There were not only significant consistency but also good linear relationship between flood season precipitation and yearly precipitation, and all the correlation coefficients were greater than 0.9. The precipitation in each station mainly concentrated in summer, but had different variation trends. The precipitation of Qilian, Yeniugou and Tuole station was increasing but the precipitation of Menyuan was decreasing.

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