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Rui GAO, Long WANG, Yanming ZHANG, et al. The Spatial-Temporal Distribution of Seasonal Drought in Central Yunnan Based on SPEI[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2019, 34(3): 516-521. DOI: 10.12101/j.issn.1004-390X(n).201807033
Citation: Rui GAO, Long WANG, Yanming ZHANG, et al. The Spatial-Temporal Distribution of Seasonal Drought in Central Yunnan Based on SPEI[J]. JOURNAL OF YUNNAN AGRICULTURAL UNIVERSITY（Natural Science）, 2019, 34(3): 516-521. DOI: 10.12101/j.issn.1004-390X(n).201807033
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The Spatial-Temporal Distribution of Seasonal Drought in Central Yunnan Based on SPEI

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    • Abstract
  • PurposesDrought and water shortage is one of the important factors restricting the development of Central Yunnan, therefore, it is essential to evaluate drought space and time distribution for working out the drought preparedness plans.
    MethodsAccording to the monthly data of precipitation and temperature collected from 45 meteorological stations of Central Yunnan, preliminarily measured water profit and loss with P-PET and with SPEI as drought index, we analyzed the spatio-temporal characteristic based on the change of SPEI and period character.
    ResultsWinter, spring and dry season had a serious water deficit, dry and winter SPEI had the decreasing trend except for spring and had the periods of 11, 18, 29 years and 8, 12, 18 years; and had the periods of 6, 12, 24 years for spring. Good agreement of SPEI in space showed general uniform type.
    ConclusionThe results of the study can provide a reference for the establishment of drought resistance strategy and the rational allocation of water resources.
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