【摘要】 选择伊洛河流域中部洛宁县为研究区域 ,运用RS和GIS技术 ,分别提取研究区 1 987和 1 999年以地貌类型为单元的土地利用数据绘制罗伦兹曲线。结果表明 :1 987～ 1 999年 ,各地类在各类地貌单元的集中与分散程度的整体状况未发生变化 ,其分布的集中程度依次为建设用地 >水域 >林地 >耕地 >未利用土地 ;但集中和分散程度发生明显变化 ,其中林地分布趋于集中 ,耕地、水域和未利用土地趋于分散 ,而建设用地基本没有变化 ,其原因主要是该时段川涧区林地大幅度增加 ,而其它地貌单元林地面积大量减少所致更多还原

【Abstract】 Lorenz curves are mapped using the land use data based on geomorphologic types in Luoning County, a chosen research area in central Yiluo River basin. These data are obtained by applying RS and GIS technology. The study shows that during 1987～1999 the distributive pattern in terms of concentrative degree of land use based on geomorphologic types in Luoning County remains unchanged: construction land > water area > woodland > cultivated land > unused land. The research also shows that the concentrative degrees of land use have changed obviously in spite of unchanged distributive pattern in terms of concentrative degree of land use. The woodlands distribution are more concentrative than before. But the cultivated land, water area and unused land tend to scatter. And the construction land are almost unchanged. The reason is that the woodland in areas with the elevation less than 400 m has increased by a big margin, while has decreased in a great quantity in other areas.更多还原