【摘要】 在分阶段水分生产函数的基础上 ,建立了旱情与旱年的模糊评价方法。按照模糊方法 ,以梯形形式建立隶属函数。对某一作物在某一年份 ,根据 Kλ值计算隶属函数进行旱情评价。以该作物的产值占各种作物产值之和的比重作为权重 ,计算旱年的综合评价向量进行旱年评价。最后用该方法对山西省的分区旱年进行评价 ,评价结果与旱灾结果对应良好 ,说明该方法是切实可行的更多还原

【Abstract】 On the basis of sub stage water yield function,this paper proposes the fuzzy assessment method for drought and drought year.The trapezoid membership function is constructed by fuzzy method.According to the K λ value,the membership function is computed and the drought is assessed.Taking the ratio of output of a crop to that of all crops as the weighted factor,we can calculate the composite assessment vector and assess drought year.The method is used in division drought year assessment in Shanxi province.The result of assessment is in good agreement with the drought damage data.It is shown that the method is practicable.更多还原