GIS支持下的湖北省赤壁市低丘缓坡建设用地生态适宜性评价

GIS-Supported Evaluation of Ecological Suitability of Construction Land in Low-slope Hilly Region of Chibi City,Hubei Province

为合理开发利用低丘缓坡资源,在生态保护优先的前提下,综合运用GIS空间分析法、层次分析法和熵权法,通过构建低丘缓坡建设用地生态适宜性评价指标体系,对研究区进行生态适宜性等级评价。结果表明:生态适宜性为高度适宜、中度适宜、基本适宜、较不适宜及不适宜5种类型,其面积分别为65.92km2、127.72km2、119.60km2、54.87km2和9.21km2;同时位于新增建设用地范围内的高度适宜、中度适宜和基本适宜的低丘缓坡资源占研究区新一轮土地利用总体规划新增建设用地范围内的低丘缓坡资源总面积的86.88%。从生态学角度构建的低丘缓坡建设用地生态适宜性评价指标体系十分合理,生态适宜性评价结果具有较强的实用性,可为低丘缓坡资源合理开发利用提供科学依据。

This paper attempts to establish an index system for evaluating ecological suitability of construction land in low-slope regions, using spatial analysis in GIS, analytic hierarchy process and entropy weight method. The results show that the ecological suitability of the construction land could be categorized into high suitability, middle suitability, basic suitability, unsuitability and permanent unsuitability, each respectively occupying an area of 65.92 km2 , 127.72 km2 , 119.60 km2 , 54.87 km2 and 9.21 km2. Furthermore,86.88 percent of the low-slope hilly region is located in incremental construction land. It is concluded that from the ecological point of view, the index system is very reasonable, and the evaluation results have a strong practicability. Furthermore, the research can provide a certain scientific basis for hilly slope region exploitation.