基于主成分分析和GIS的统筹市域土地利用分区研究——以甘肃天水市为例

以乡镇为研究单元,从土地利用的经济发展、社会发展、生态、土地利用现状和效益等5个方面,建立区域土地利用综合分区的指标评价体系,利用主成分分析法对天水市土地利用程度进行综合评价,结合空间聚类分析,将天水市分为3大土地利用区。根据土地适宜性评价结果,结合DEM、坡度、土壤、气温、降雨等资料,利用GIS空间分析方法,将天水市划分为5个管制分区,并提出各分区内土地利用的管制措施。为区域土地利用规划、生态环境保护与建设规划提供科学依据。

Research on overall planning of land use division in Tianshui based on PCA and GIS

Overall planning of land use division is the key content of general land use planning revision at provincial level. According to the requirements of the strategy for regional development policy and socio-economic development of Tianshui City, the regional land use divisional comprehensive evaluation index system was built up by selecting 20 indexes from the following 5 fields of regional land use: economic development, social development, environment, land utilization situation and benefit. Comprehensive evaluation of land use extent taking counties and cities as units in Tianshui was made by using principal component analysis. Combined with clustering analysis, Tianshui was divided into 3 land-use zones, and some countermeasures and advices for land-use strategy and policy were put forward. Furthermore, based on land suitability evaluation, Tianshui was divided into 5 regulation zones using GIS spatial analysis, combined with data of DEM, slope, soil, temperature and precipitation, and the regulation measures were suggested for land utilizations in various zones. This study can provide scientific basis for regional land use planning, eco-environment protection and construction planning.