[1]ZHANG Lu,ZHU Zhongyuan,WANG Huimin,et al.Analysis on Risk of Meteorological Drought of the Upstream Xilin River Basin Based on SPEI[J].Research of Soil and Water Conservation,2020,27(02):220-226.
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Analysis on Risk of Meteorological Drought of the Upstream Xilin River Basin Based on SPEI
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
220-226
Column:
Public date:
2020-03-30
- Title:
- Analysis on Risk of Meteorological Drought of the Upstream Xilin River Basin Based on SPEI
- Keywords:
- SPEI; Xilin River Basin; drought intensity; drought frequency
- CLC:
- P462.4
- DOI:
- -
- Abstract:
- To study the drought risk of the Xilin River Basin under the change of climatic factors, and provide an effective basis for local water resources and ecological management, by calculating the standardized precipitation evapotranspiration index(SPEI)of 11 meteorological stations in Xilinhot and Dongwuzhumuqi from different time scales(1, 3, 6 and 12 months)from 1982 to 2018, the frequency of drought and the intensity of drought on the annual, seasonal and monthly scales were analyzed to reveal the characteristics of drought and space-time evolution over the years in the Xilin River Basin. The results showed that the SPEI of the Xilin River Basin presented the growing trend in the past 37 years, the frequency of special and severe droughts had been decreasing year by year, the frequency of light and moderate droughts had the fluctuating uncertainty, and the seasonal concentrated drought occurred; from the perspective of spatial analysis, the droughts in Xilin River Basin occurred on the annual, seasonal and monthly scales, in terms of seasonal changes, large-scale droughts occurred in winter and local droughts occurred in spring, the overall distribution of drought was characterized as that the frequency of drought was low in the north is and high in the west; the drought was the most severe in summer, and followed by the autumn, the overall distribution was weak-severe-weak pattern from northwest to southeast.
- References:
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Last Update:
2020-02-25