基于MAPGIS的小流域土地质量评价

The assessment of land quality in small watershed based on MAPGIS

根据研究区土地资源的特点,以土壤类型图、土地类型图、土地利用图经过叠加分析所获得的土地资源单元作为基础评价单元,对GIS在黄土高原小流域土地质量评价中的应用进行了尝试。基于MAPGIS,应用主成分分析方法,选择8个样本对宁南山区上黄小流域进行了土地质量等级评价,并对主成分的综合得分利用聚类分析划分土地等级,生成小流域土地质量等级图。图3,表3,参10。

Land resource is the foundation of agricultural production, to evaluate land quality specifically is of importance to plan and manage agricultural production. According to the characteristics of soil resources of the study area, the soil resource unit which was overlaid by soil type map, land type map and land use map was used as the basic evaluating unit. The paper explored the application of MAPGIS in land quality assessment in small watershed. Based on MAPGIS, major component analysis in which 8 samples were chosen was used to assess the land quality classes of the Shanghuang small watershed in Ningnan mountainous region, clustering analysis of major component scores was used to decide the land classes and class map of land quality of small watershed was produced finally.