SUITABILITY EVALUATION OF GROUND SUBSTRATE BASED ON AHP-GIS:A Case Study of Shuangliao-Dongfeng Region in Jilin Province
Taking Shuangliao-Dongfeng region as the study object,the GIS spatial analysis and analytic hierarchy process(AHP)are used to evaluate whether the ground substrate is suitable for the land use types such as forest land,grassland and cultivated land in the region.The evaluation model of ground substrate suitability is constructed with 12 indexes from 4 aspects including terrain,physical and chemical properties of ground substrate,and climate characteristics.The evaluation results show that the overall suitability of ground substrate in the region is good,and the total area of Grade Ⅰ and Ⅱ is 5 072.78 km2,accounting for 41.55％,mainly distributed in the central plain and southeastern gully area.The total area of Grade Ⅲ is 3 609.91 km2,accounting for 29.57％,distributed sporadically throughout the study area.The total area of Grade Ⅳ and Ⅴ is 3 525.84 km2,accounting for 28.88％,concentrated in the western plain area,with minors distributed in the southeastern hilly area.Compared with the traditional evaluation of land use suitability,the evaluation of this study embeds the related indicators of ground substrate to seek a breakthrough for the comprehensive utilization of land space by ground substrate survey and provide ideas for the following work of ground substrate suitability evaluation.
ground substrateAHPGISsuitability evaluationJilin Province
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