基于GIS的斗门县土地资源评价

GIS Based Land Resources Evaluation of Doumen County

在GIS技术支持下 ,应用土地资源评价的原理和方法 ,采用指数和法对广东省斗门县土地资源进行评价 ,划分为 5个不同的质量等级 ,统计其面积并绘制土地资源评价图 ,对不同级别的土地资源进行分析 结果表明 :采用指数和法划分出斗门县耕地资源 (包括Ⅰ、Ⅱ等地 )共 41418 73hm2 ,约占全县土地总面积 6 2 % 其中 ,Ⅰ等地主要是质量中上的水稻土和菜地 ,约占耕地总面积的 73% ;Ⅱ等地主要是中低产田 ,其数量约占全县耕地 2 7% 斗门县非耕地资源所占比重较大 ,约为土地总面积的 38%

Based on the technique of GIS and using the method of land resources evaluation, The land resources of Doumen were evaluated with Index Summation Method. The land resources were classified into five qualitative grades and water area. The land resources qualitative rank maps were obtained. The different grades land resources were analyzed and discussed. By using the Index Summation Method, the result show that two of them (grade Ⅰand grade Ⅱ) were cultivated lands which were 41 418.73 hm 2 and about 62% of the total, while the other three were non cultivated lands. Among the cultivated lands, 73% were good quality paddy soil and garden mould. 27% were lands with obvious limiting factors to agricultural production. The area of non cultivated lands was larger, occupying about 38% of the total land area.