基于层次聚类法的四川省“长治”工程土地利用分区研究

Land Use Regionalization of Sichuan Changzhi Soil Erosion Control Project Based on Hierarchical Cluster Analysis

水土流失综合治理是改善土地利用结构的重要途径。"长治"工程是改善长江上游流域生态环境的水土流失综合治理工程。以四川省"长治"工程第五期小流域综合治理区为例,在野外调查、实测的基础上,根据土地利用空间差异,在土地利用结构中选取土地利用类型作为指标,构建土地利用分区体系,运用层次聚类法,进行项目区土地利用类型分区,分析了各区的土地利用特点。研究结果表明:项目区可分为重力侵蚀和水力侵蚀两个大区以及两个亚区,分别以农地和林地两种用地情况为主要因子,通过分析各区的土地利用特点,为研究区农业区划及土地资源利用提供科学依据。

Comprehensive control of soil erosion is a valuable means for improving the structure of land-use. The Sichuan Changzhi soil erosion control project （Changzhi） aimed to comprehensively improve the ecological environment in upper watershed of Yangtze River. Taking the small watershed management area as an example, where is the fifth phase of the Changzhi, selecting the.land use types from land use structure as the evaluation indicators to establish the land use regionalization system based on the field investigation and measuring and according to the spatial differences in land use, using the hierarchical clustering analysis to classify the land use types in project area through analyzing the characteristics and the distinctive features of land in each region. And also the scientific references of feasibility on the study of agricultural regionalization and construction are presented. The results showed that the project area can be divided into two main regions, gravity erosion area and water erosion area, and two sub-areas, where taking agricultural land use and forest land use as main factors, respectively. Through analyze the characteristics of land use in each region to provide scientific basis for studies on agricultural regionalization and utilization of land resources.