成都龙泉山地区建设用地生态适宜性评价

Evaluation on Ecological Adaptability of Land for Construction in Longquanshan,Chengdu

随着景观格局与生态过程之间的关系日益受到重视,传统的评价方法已经不能满足生态适宜性评价的发展需要。本文以成都市龙泉山地区为例,从景观类型、生态功能、生态价值、土壤侵蚀敏感性和地质灾害敏感性5个方面建立评价指标体系,分别采用最小累积阻力模型和模糊综合评判法描述水平生态过程和垂直生态过程下的生态适宜性,综合两种评价结果进行建设用地的生态适宜性评价。研究结果表明,模型机理的差异使评价结果有着很大的区别,两种方法的综合应用可以有效弥补彼此的不足,本文将研究区的生态适宜性评价结果划分为禁止开发区、严格限建区、一般限建区、重点开发区和优化开发区5个分区,各区的面积分别为259.70km2、793.89km2、1220.35km2、739.68km2和490.42km2。以往的生态适宜性评价方法往往单一地考虑水平或者垂直生态过程,本文构建的这种综合水平和垂直生态过程的评价方法为生态适宜性评价的方法研究提供了有益的尝试和补充。

With the ecological factors becoming more and more important, the traditional method no longer meets the requirements of the ecological suitability assessment. In this paper, the area of Longquan Mountains in Chengdu was taken as an example to conduct a case study. An assessing index system was established from five respects including landscape types, ecological function, ecological value, soil erosion sensitivity and geological disaster. The minimum cumulative resistance model and fuzzy comprehensive evaluation approach were adopted respectively to describe the ecological sustainability of the horizontal and vertical ecological processes and then the results of the both assessments were used to assess the ecological sustainability of the land for construction. The difference of the models mechanism led to big difference of assessment results. Integrated application of the two methods could effectively make up the shortages of each other. In this paper, the results of ecological sustalnability for the area in study were classified into five zones as non-development zone, strictly limited construction zone, limited construction zone, key development zone, development zone and optimal development zone with areas of 259. 70, 793. 89, 1220. 35, 739. 68 and 490. 42 km2 respectively. The traditional methods normally only considered a single one from the ecological sustainability of the horizontal proeess or vertical ecological process, the integrated method developed in this study offers beneficial attempt and supplement for assessment of ecological sustainability.