基于空间洛伦茨曲线的喀斯特县域土地利用结构变化分析——以广西都安为例  

Change Analysis of Land Use Structure in Karst County Area Based on Spatial Lorenz Curves

作　　者：苏广实[1,2] 王世杰[1] 胡宝清[3] 李月连[3] 

机构地区：[1]中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002 [2]广西教育学院旅游与环境学系,广西南宁530023 [3]广西师范学院资源与环境科学学院,广西南宁530001

出　　处：《安徽农业科学》2009年第27期13404-13407,共4页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金"基于SOTER数据库的广西石漠化的胁迫阈值与综合评估研究"(40661005);广西自然科学基金项目(桂科基067922)

摘　　要：基于喀斯特典型县域——都安瑶族自治县1977年航片数据,1988、1999和2005年遥感影像数据,采用空间洛伦茨曲线和基尼系数分析方法,对都安县28年来土地利用结构变化进行定量分析。结果表明:在空间分布上,疏林地、有林地、草地和沟谷耕地在各乡镇分布不均衡,灌丛地、建设用地、裸岩地和坡耕地在各乡镇分布的面积比例大致相等;在时间演变上,坡耕地、裸岩地、建设用地和有林地朝着均匀的方向分布;灌丛地、草地和沟谷耕地面积不断减少,朝着相对集中的方向分布。该结论可为喀斯特县域合理利用土地、石漠化综合防治和生态修复提供参考。Based on the aerial - photographs data of typical karst county Duan in 1977 and the remote sensing image data in 1988, 1999 and 2005, the changes of land use structure in Karst county area during the past 28 years were qualitatively analyzed, by applying the spatial Lorenz curve and Gini coefficients. The results showed that in space woodland, forest, grass and valley of arable land were distributed unbalance; while shrub, construction, uncovered rock and sloping land were distributed with roughly equal proportion in the towns and villages. In temporal evolution, the distribution of sloping land, uncovered rock, construction and forest become more balance, yet the area of shrub, grass, valley of arable land decreased and they distribute became relative concentration. This results can be helpful for rational use of land in karst county area, integrated control of rock desertification and ecological restoration.

关 键 词：洛伦茨曲线 基尼系数 喀斯特县域 土地利用结构 

分 类 号：F301.2[经济管理—产业经济]