广州市人居环境自然适宜性评价

Evaluation of Natural Suitability for Human Settlement in Guangzhou

采用RS、GIS技术,以100 m×100 m的栅格为评价单元,选取地形起伏度、温湿指数、植被指数和水文指数等指标构建评价模型,综合地评价广州各地区的人居环境自然适宜性和限制因子;人口分布与自然适宜性的关系。研究表明：广州地区人居环境指数介于32.25~79.03之间,整体呈由从中北部向南、东递减的趋势,人居环境指数能大体体现广州各地区人居环境自然适宜程度的差异。广州地区的人居环境指数划分为三级：临界适宜地区,面积为10.4 km2,占全市总面积的0.14%,地形和水文是其主要的限制因子;一般适宜地区,面积为3687.46 km2,占全市总面积的49.6%,植被为主要限制因子;比较适宜地区,面积为3736.54 km2,占全市总面积的50.26%,自然条件较好。77%的广州人我口集中分布于人居环境一般适宜的地区。

To evaluate the natural environment of human settlements, by choosing terrain, climate, land cover and water condition as the evaluation factors, based on remote sensing and geographic information system, this paper builds the basic database and sets up the human settlements environment index （HE1） model and evaluates the suitability of natural environment and limiting factors of human settlements in Guangzhou with it. The result shows that： The HEI of Guangzhou increases from middle part to south and north in general ,which reflects the regional difference of natural environment suitability of human settlements in Guangzhou. The HEI of Guangzhou is classed into three groups ：the critical suitable region, covering a land area of 10.4 km2, accounts for 0.14% of the total area; the common suitable region, with a land area of 3687.46 km2, accounts for 49.6% of the total area; the moderate suitable region, covering a land area of 3736.54 km2, accounts for 50.26% of the total area. More than 77% of the population of Guangzhou live in the common suitable region.