喀斯特县域土地利用结构信息熵时空变化分析——以广西都安为例  

Information Entropy Temporal-spatial Evolution Analysis of Land Use Structure in Karst County Area

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530022 [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26期12874-12877,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：基于信息熵理论，利用喀斯特典型县域都安县1977年航片数据以及1988、1999和2005年遥感影像数据，分析了都安县1977—2005年土地利用结构信息熵的时空变化特征。结果表明：1977—2005年都安喀斯特土地利用结构信息熵呈现先增加后减小再增加的变化态势，熵值的变化与先天脆弱的喀斯特地质-生态背景密切相关，经济发展、人口增长和政策等因素是都安喀斯特土地利用结构信息熵时序变化的直接动因。都安喀斯特土地利用结构信息熵在空间上存在明显差异，这种差异是各乡镇地形地貌、水文地质等自然生态环境因素以及区位条件、经济发展水平等社会经济因素综合作用的结果。Based on the information entropy theory, the temporal-spatial evolution character of information entropy of land use structure in Du＇ an county from the year 1997 to 2005 were analyzed by applying the aerial-photographs data in 1977 and the remote sensing image data of the year 1988,1999,2005 of typical karst in Du＇ an county. The results showed that the information entropy of land use structure in Du ＇an karst area presented a situation of increasing first then reducing and increasing again in the end, and the changes of information entropy were related to innate fragile karst geology-ecological background, together with the economic development, population growth, police and so on as the direct agent of temporal-spatial evolution on information entropy of land use structure in Du＇ an county. The information entropy of land use structure in Du＇ an karst regions showed obvious differences in space, and these differences were effected synthetically by nature eeo-environ- ment factors such as .topography, hydrogeology etc. and socio-economic factors such as location, the level of economic development etc. for the towns and villages.

关 键 词：信息熵 喀斯特 土地利用结构 时空变化 

分 类 号：F301.24[经济管理—产业经济]