摘要
以地貌差异明显的江苏省仪征市为例,根据地貌类型将其划分为平原区、岗地区和丘陵区三个子评价区,在GIS支持下,利用“压力—状态—响应”(PSR)模型确定各子评价区的评价因子,运用层次分析法确定各子评价区的因子权重,并运用分等定级法和模糊数学法进行评价因子的分值量化,最后利用加权指数求和模型进行综合分值的计算并划分等级,以及成果图的输出。结果表明,仪征市土壤环境整体较好,一等与二等土壤分别占总土壤面积的67.6%和26.3%,三等与四等土壤加起来占总土壤面积的6%,其中平原区与岗地区的土壤环境整体好于丘陵区。此方法可用于地貌具有差异的县级区域,评价结果较为准确、可靠。
In this paper, the authors aim to make an evaluation of soil environment of Yizheng City, in which there are differences in landform. With the support of GIS, the authors divide the whole region into three units, which are plain-unit, hillock-unit and hill-unit. During the evaluation, the authors picked out tile factors in every unit for evaluation by using the press-state-response model（PSR）, and adopted AHP method to defined the factor＇s weight in every unit. Then, according to membership function of evaluation factors, classification method and FUZZY mathematics were used to define the value of factors. Finally, the authors set up the model of weighted integrated index method to calculate the integrated index, based on consulting the evaluation criteria, soil environmental quality results were classified and mapped. The results showed that, soil environmental in Yizheng City is better as a whole, the acreage of soil with quality grades of one and two accounts for 67.6% and 26. 3% respectively, however the acreage of soil with quality grades of three and four is about 7% aggregatedly. The results also showed that, soil environment of plain-unit and hillock-unit was better than that of hill-unit. In a word, it is such a method that capable in county-wide region which has differences in physiognomy, and the results of evaluation are correct and trustable.
出处
《山地学报》
CSCD
北大核心
2007年第1期45-53,共9页
Mountain Research
基金
由"江苏省国土生态地球化学调查"项目资助(水[2003]091-1)~~
关键词
地貌
县级尺度
土壤环境
评价
physiognomy
county-wide scale
soil environment
evaluation
