运用分形理论对1950 ~ 1997年我国洪涝灾害农田成灾面积序列进行了研究。
Based on fractal theory, time sequence of inundated area of cropland due to flood disaster from 1950 to 1997 are studied.
最后依据干旱指数建立了干旱受灾面积和成灾面积评估模式，以及干旱经济损失评估模式。
Finally, assessment the model of area covered by drought, the area affected by drought and the economic losses of agriculture by drought is established according the drought index.
应用经验模态分解(EMD)方法分析了湖南省1949 ~ 2002年洪涝灾害成灾面积波动情况。
Empirical mode decomposition (EMD) method was used to study the fluctuation of inundated area of flood disaster from 1949 to 2002 in Hunan Province.
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