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[1]XI Liping,WU Haiying,CAI Wenqing.Study on Change Trend of Precipitation in Wuwei County in Recent 60 Years[J].Research of Soil and Water Conservation,2019,26(01):209-214.

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Study on Change Trend of Precipitation in Wuwei County in Recent 60 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 01 Page number: 209-214 Column: Public date: 2019-02-28

Title:: Study on Change Trend of Precipitation in Wuwei County in Recent 60 Years

Author(s):: XI Liping¹, WU Haiying², CAI Wenqing¹; 1. Anhui Water Conservancy Technical College, Hefei 231603, China;
2. Meteorological Bureau of Wuwei County, Wuhu, Anhui 238300, China

Keywords:: precipitation; variation tendency; linear tendency estimation; Mann-Kendall mutation detection; wavelet analysis; correlation analysis

CLC:: P333.1

DOI:: -

Abstract:: To reveal the trend and pattern of the precipitation in Wuwei County for the purpose of resource management and ecological construction, we utilized linear tendency estimation, Mann-Kendall mutation detection, and wavelet analysis and other methods to analyze the precipitation information in Wuwei County from 1957 to 2016. The results demonstrated that:based on precipitation in Wuwei County, there was an uptrend in summer and winter, and a downtrend in spring and autumn; for annual precipitation, there was an uptrend. The annual precipitation days showed a downward trend, and the precipitation days in the four seasons were the same as precipitation amounts in the four seasons. The annual and seasonal average precipitation intensities showed the upward trend. The annual and seasonal precipitation intensities increased year by year. The declining number of precipitation days in spring and autumn dominated the downtrend of precipitation in these two seasons. The growing number of precipitation days as well as the average precipitation intensity resulted in the uptrend of precipitation in summer and winter. There was no significant change in annual precipitation, while major changes in precipitation happened in spring in 1993, in summer in 1979, in autumn 1985, and in winter in 1987. The annual precipitation and each season precipitation had the cyclical variation pattern of abundant and dry alternation. At present, annual and seasonal rainfall amounts are all in the rich stages and will last for a long time. There is a negative correlation between annual precipitation, spring, summer, and autumn precipitation, and the corresponding average temperatures. There is a positive correlation between winter precipitation and average temperature.

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