[1]WANG Huimin,HAO Xiangyun,ZHU Zhongyuan.Analysis of Drought Condition Based on Integrated Meteorological Drought Index—Taking the Xilinhe River Basin as an Example[J].Research of Soil and Water Conservation,2019,26(02):326-329,336.
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Analysis of Drought Condition Based on Integrated Meteorological Drought Index—Taking the Xilinhe River Basin as an Example
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 02
Page number:
326-329,336
Column:
Public date:
2019-04-28
- Title:
- Analysis of Drought Condition Based on Integrated Meteorological Drought Index—Taking the Xilinhe River Basin as an Example
- Keywords:
- weather factor; Xilinhe River Basin; CI; drought event
- CLC:
- P426.616
- DOI:
- -
- Abstract:
- Precipitation and air temperature are the main meteorological factors in relation to drought. Using the monthly data of precipitation and air temperature from 1981 to 2016, we plotted the curve of maximum and minimum and analyzed the correlation. The integrated meteorological drought index (CI) was calculated using data. CI was used to evaluate the drought conditions in the Xilinhe River Basin. The results showed that in the study area during 1981—2016, the change trend of the mean monthly temperature curve was relatively weak, with the maximum and minimum temperatures being 24.94℃ and -23.53℃, respectively; the change trend of the maximum precipitation presented the decreasing state, while the minimum precipitation did not change substantially; the maximum and minimum values of precipitation were 178.1 mm and 0 mm, respectively. In 36 years, the CI values were greater than zero in the spring, summer, and autumn, and there were only 121 light drought events on the monthly scale, of which drought occurred most frequently in spring, came the next in autumn; the frequency of drought events was the least in summer. The frequency of droughts showed a slightly decreasing trend.
- References:
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1900-01-01