兰州市城区生态地质环境承载力空间格局

发布时间：2018-07-21 21:23

【摘要】：根据兰州市城区生态地质环境特征,从地质环境、生态环境和社会环境3个方面选取了12个评价指标,构建了兰州市城区生态地质环境承载力综合评价指标体系,运用层次分析法、加权综合评价法,借助ArcGIS10.2空间分析技术,对兰州市生态地质环境承载力进行了基于栅格尺度的综合评价,得到城区生态地质环境承载力高分辨率的空间评价结果,并将综合评价值从高到低划分为Ⅰ、Ⅱ、Ⅲ、Ⅳ4个等级进行空间展示.结果显示:Ⅰ级为优,区域面积最小,仅占研究区总面积的9.13%,主要分布于西固区、安宁区和城关区等黄河沿岸的部分高漫滩和一、二级河流阶地;Ⅱ级为良,占比33.58%,大部分位于兰州市七里河区北部、城关区南部的一、二级阶地等区域,以及主城区南北两侧的小部分山区;Ⅲ级为中,区域面积最大,占比46.72%,连片分布于主城区南北两侧的二、三级阶地区域和南北两山后缘的高海拔山区;Ⅳ级为差,占比11.07%,主要位于主城区南北两侧三级及三级以上高阶地、南北两山,并呈条带状在南北两侧环绕兰州市城区.研究结果为兰州城区的建设发展提供了重要的科学参考,对城市发展具有重要的指导意义.
[Abstract]:According to the characteristics of ecological geological environment in Lanzhou city, 12 evaluation indexes were selected from three aspects of geological environment, ecological environment and social environment, and the comprehensive evaluation index system of ecological geological environment carrying capacity of Lanzhou city was constructed. With the help of the analytic hierarchy process (AHP), the weighted comprehensive evaluation method and the ArcGIS 10.2 spatial analysis technique, the ecological geological environment carrying capacity of Lanzhou was evaluated based on grid scale. The high resolution spatial evaluation results of eco-geological environment carrying capacity in urban area were obtained, and the comprehensive evaluation values were divided into four grades, I., 鈪，

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