[1]HUANG Jiangang,LIU Huiying.Precipitation Characteristics of Gongshui Basin in the Primary Source of Ganjiang Basin During the Period 1957-2016[J].Research of Soil and Water Conservation,2020,27(03):91-100.
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Precipitation Characteristics of Gongshui Basin in the Primary Source of Ganjiang Basin During the Period 1957-2016
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
91-100
Column:
目次
Public date:
2020-04-20
- Title:
- Precipitation Characteristics of Gongshui Basin in the Primary Source of Ganjiang Basin During the Period 1957-2016
- Keywords:
- precipitation characteristics; trend and abrupt change analysis; Gongshui basin; Ganjiang Basin
- CLC:
- P426.6
- DOI:
- -
- Abstract:
- Based on the daily rainfall data of 33 rain-measuring stations of Gongshui Basin of main source of Ganjiang River during 1957—2016, the multi-time scale characteristics of rainfall were analyzed by using linear regression method, Sen's slope estimation method, accumulated anomaly, Mann-Kendall trend tests, Pettitt tests and wavelet analysis methods. The results showed that the average annual rainfall of Gongshui Basin was 1 647.38 mm in the past 60 years, which increased at a rate of 1.39 mm/year. During this period, there was no significant trend and abrupt change, but there was the 32-year periodic change. The rainfall in spring accounted for 40.15% of the whole rainfall, while rainfall in winter is the least one, and only accounted for 13.40% of the whole rainfall. The change rates of spring, summer, autumn and winter were 0.15 mm/year, 0.76 mm/year, -0.41 mm/year and 0.88 mm/year, respectively. Intra-year, the most rainfall occurred in May and June, accounting for 16.27% and 16.20% of the whole rainfall, respectively, while rainfall was mininum in December, accounting for only 3% of the whole rainfall. Rainfall in August presented the significantly increasing trend, while the rainfall in October significantly decreased(α=0.10). Spatially, the region with the highest rainfall is located at Yangdi station of Mianjiang sub-basin in the eastern part of basin, while the region with lowest rainfall is located at Longtou station of Lianshui sub-basin in the southwestern part of basin. The spatial distribution shows that the annual rainfall decreases from east to west and from north to south, spring and summer. The trends of rainfall in the Meijiang, Mianjiang and Qinjiang sub-basins are on the rise, while that in the Lianshui and Xiangshui basins are on the decline. The study has a very important reference meaning for the planning and scheduling water resources, warning mountain flood disaster.
- References:
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Last Update:
2020-04-30