生态视角下的山区城镇建设用地适宜性评价

发布时间：2019-08-09 20:04

【摘要】：【目的】以奉节县为研究对象,将生态敏感性评价和生物多样保护功能评价纳入评价指标体系,评价山区城镇建设用地适宜性。【方法】共选取包含自然、经济和生态3方面的13个弹性因子和3个刚性因子构建山地城镇建设用地适宜性评价模型,采用层次分析法(AHP)为各弹性因子分配权重,利用ArcGIS的空间分析功能进行运算并将结果分为5个等级。【结果】1)适宜建设用地和较适宜建设用地面积分别占区域面积的2.2%和4.18%,可建设用地少且空间分布不均,较为集中分布于朱一镇、永安街道及鱼复街道一带;2)92%的建成区分布在适建区内。绝大部分乡镇建成区与适建区重合度较高,表明奉节县的城镇建设受限制性条件约束小,布局较为合理。【结论】研究结果可为奉节县的城镇建设提供较好的科学依据,对于山区城镇建设用地适宜性评价具有较好的借鉴意义。
[Abstract]:[objective] taking Fengjie County as the research object, the ecological sensitivity evaluation and biological diversity protection function evaluation were brought into the evaluation index system to evaluate the suitability of urban construction land in mountainous areas. [methods] 13 elastic factors and 3 rigid factors including natural, economic and ecological aspects were selected to construct the evaluation model of construction land suitability in mountainous cities and towns, and the analytic hierarchy process (AHP) was used as the distribution weight of each elastic factor. The results are divided into five grades by using the spatial analysis function of ArcGIS. [results] 1) the suitable construction land and the more suitable construction land area account for 2.2% and 4.18% of the regional area, respectively. The construction land is less and the spatial distribution is uneven, which is more concentrated in Zhuyi Town, Yongan Street and Yupu Street. 2) 92% of the built-up areas are distributed in the suitable construction areas. The coincidence degree between the built-up areas and the suitable areas in most villages and towns is high, which indicates that the urban construction in Fengjie County is limited by restrictive conditions and the layout is more reasonable. [conclusion] the research results can provide a good scientific basis for the urban construction in Fengjie County, and have a good reference significance for the evaluation of the suitability of urban construction land in mountainous areas.
【作者单位】：重庆师范大学地理与旅游学院;重庆师范大学三峡生态环境遥感研究所;重庆市高校GIS应用研究重点实验室;重庆师范大学职教师资学院;重庆市环境科学研究院;重庆市地理信息中心;
【基金】：国家自然科学基金项目(No.41571419)
【分类号】：F299.23;X826

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