基于改良熵权法的南方五省(市)小油桐气候适宜性区划

The Climate Suitable Zoning Method of Jatropha curcas L. in Five Southern Provinces(Municipalities) of China Based on Improved Entropy Weight

以南方五省(市)(湖南、湖北、贵州、四川、重庆)81个气象站点1981-2010年的气象数据为基础,结合文献资料以及专家的意见,确定了5个区划因子及其分级,改良了传统的熵权计算模型,得到了各区划因子的权重。根据各站点的经纬度和海拔数据,应用多元线性回归获得了区划因子的空间分布模型,回代残差得到区划因子的空间分布。构建了一个隶属度函数,并将其在GIS区划应用中进行实现,得到了单因子隶属度的空间分布,按照得到的权重叠加后得到南方五省(市)的小油桐(Jatropha curcas L.)适宜性区划图,并依据综合得分进行适宜区划分,得出研究区域范围内,适宜区占总面积的7%,第二类过渡区占5%,次适宜区占16%,第一类过渡区占30%,不适宜区占42%。

Based on meteorological data of 81 meteorological stations from 1981 to 2010 in five southern provinces （municipalities） including （Hunan, Hubei, Guizhou, Sichuan, Chongqing） and considering references and experts＂ advice, five indicators of divisions and their classification were established. The traditional entropy weight was improved. Weights of five indicators were measured. According to data of the latitude, longitude and altitude of each site, multiple linear regressions was used to determine the spatial distribution mode of indicators. The residuals back substituted to get spatial distribution of each indicators.The membership function was bulit and implemented in the application of GIS divisions to gain the membership distribution of single factor. Based on the weights, the suitability zoning map of Jatropha curcas L. of the five southern provinces （municipalities） was obtained,and the suitable area was divided according to the composite score. The results showed that 7% of the total area was suitable area, 5% of the total area was the second class of the transition zone, 16% of the total area was secondary suitable area, 30% of the total area was the first class of the transition zone,42% of the total area was unsuitable area.