[1]ZHU Shengnan,LIU Weilin,WAN Yifan,et al.Temporal and Spatial Distribution Characteristics of Drought and Its Correlation with ENSO in Fuhe River Basin[J].Research of Soil and Water Conservation,2020,27(06):131-138.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
131-138
Column:
目次
Public date:
2020-10-20
- Title:
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Temporal and Spatial Distribution Characteristics of Drought and Its Correlation with ENSO in Fuhe River Basin
- Author(s):
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ZHU Shengnan1, LIU Weilin1, WAN Yifan1, HUANG Yipeng1, WU Bin1, LIU Lina1, YANG Chuanyang2
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(1.Jiangxi Provincial Key Laboratory of Hydrology, Water Resources and Water Environment, Nanchang Institute of Technology, Nanchang 330099, China; 2.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China)
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- Keywords:
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Fuhe River Basin; SPI; drought; ENSO events
- CLC:
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P426.616; P732
- DOI:
-
-
- Abstract:
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In order to analyze the spatial and temporal distribution characteristics of drought and to explore its correlation with ENSO events, based on the monthly precipitation data from 1960 to 2005 in 9 meteorological stations in the Fuhe River Basin, according to the calculated SPI, the MK trend test and correlation analysis were used to analyze the characteristics of monthly, four seasons, annual droughts and spatial changes in Fuhe River Basin from 1960 to 2005, and to study the relationship between ENSO events and the region. The results showed that there was a tendency of drought in the spring in the watershed and a trend of humidification in the winter; in the 1960s and 1970s, there were many droughts with high intensity; from 1990 to 2005, the degree and frequency of droughts in the river basin as a whole increased. In terms of spatial changes, the high frequency of drought in each season concentrated in the northeast of the basin: in the Chongren in spring, Nanfeng and Lichuan in summer, Fuzhou and Jinxi in autumn, and Dongxiang in winter. The correlation between the SSTA index and the SPI index in the Fuhe River Basin in spring was the most obvious, and then decreased in autumn and summer. The polynomial fitting relationship between the intensity of the ENSO event and the SPI influencing factors of the Fuhe River Basin showed that the precipitation of the ENSO event in the warm event year was very obvious, and the possibility of drought was greater than that in the cold event year, the greater the intensity of the ENSO warm event, the more likely a severe drought event will occur in the study area. The response of the drought to the El Niño and La Niña events was the most significant after lagging by 1 to 2 months and 3 to 4 months, respectively.