黄土高原乡级尺度土地利用适宜性评价——以宁南山区河川乡为例

Assessment of Land Use Suitability at Town Scale on Loess Plateau——A Case in Hechuan Town,Guyuan City,Ningxia Hui Autonomous Region

以宁南山区河川乡为例,开展黄土高原乡级尺度的土地利用适宜性研究。根据河川乡自然与社会经济的实际情况,从土地利用的地形、土壤养分、土壤侵蚀、水源条件等方面建立土地利用适宜性评价指标体系,采用层次分析法确定评价指标权重,将GIS空间分析方法与综合指数评价模型相结合,对河川乡土地的适宜性与适宜程度进行了定量评价。结果表明:河川乡土地可以划分为高度宜农地、中度宜农地、宜林地、宜林牧地和宜牧地,它们占总面积的比例分别为7.34%,13.49%,2.47%,41.37%,35.33%。评价结果可为河川乡土地利用格局的优化提供理论依据和数据基础。

The land use suitability at town scale on Loess Plateau was evaluated in this study by taking Hechuan Town of Guyuan City in Ningxia Hui Autonomous Region as an example.The assessment index system of land use suitability including terrain,soil nutrient,soil erosion,water factors was established based on considering the natural and social economic situation of of Hechuan Town.The index weight of suitability assessment was determined by the analytic hierarchy,the spatial analysis method on GIS and the comprehensive index method were conducted to assessment the land use suitability.The results showed that the land of Hechuan Town was classified into five categories which were the land highly suitable for agriculture,moderately suitable for agriculture,suitable for forestry,suitable for forestry and stockbreeding,suitable for stockbreeding,and accounted for 7.34%,3.49%,2.47%,41.37%and 35.33%,respectively.This assessment results could provide data basis to determine the best land use plan of the study area.