基于GIS的低丘缓坡土地利用建设适宜性评价——以大理市为例

选择大理市作为研究区域,根据大理市全国第二次土地调查数据、土地利用总体规划数据和社会经济统计数据,结合相关研究和区域特点,从地形地貌、生态环境、空间区位、地质条件、社会经济5个方面选择了18项相关性因子构建起一套适应研究区域实际情况的评价指标体系,采用层次分析法确定指标权重,并在利用传统的多因素综合评价模型的基础上,引入CA模型的原理进行适宜性模拟,并利用GIS空间分析功能对评价结果进行分级,按照适宜性分值划分为不适宜、一般适宜、中等适宜、高等适宜4级,并以适宜性结果为基础进行土地利用分区研究,将评价区域划分为优先建设区、选择建设区、建设保障区和生态功能保护区。研究结果可为低丘缓坡地区开发建设适宜性评价以及区域新型山地城镇建设研究提供一定参考。

Suitability Evaluation of Land Construction Use about Gentle Hills Based on GIS—A Case Study of Dali City

Choosing Dali City as the research area, based on the overall plan of data and social economic statistical data of land use in the second national land survey data, using GIS spatial analysis functions, combining research and related regional characteristics, selecting from topography,ecological environment, spatial location, geological conditions, socio-economic aspects of 18 correlation factor to construct the evaluation index system.Using analytic hierarchy process to determine the weight of index.Based on the traditional multi factor comprehensive evaluation model, the CA model was used to simulate the model.And using the spatial analysis function of GIS,evaluation results were divided into four levels basing on suitability scores: inappropriate, generally, moderate, and higher suitability and the suitability of the results as the basis for land use zoning study, the assessment area was divided into priority areas, selecting construction area, building security and ecological function protected areas.The results could be reference to similar gentle hills development suitability evaluation and the construction of regional new mountain towns.