The Index Figure of Floods or Drought in Hot Summer and Its Prediction Model in Longnan

By using of the climatic rule and the condition of agricultural production in Longnan,the index figure of floods or drought used to judge the guantitative character of floods or drought in hot summer was ascertained.Based on the index figure from 1967 to 1996,with EOF analysis,the regions of floods or drought in hot summer in Longnan were divided into different parts.By analysing the character in these parts,the prediction model of the mean generating function method was established.

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