洞庭湖区土地生态功能价值变化分析  

Study on Change of Land Ecological Function Value in Dongting Lake District

作　　者：王海燕[1] 段建南[1] 杨威[1] 胡文敏[1] 刘艺[1] 

机构地区：[1]湖南农业大学资源环境学院,湖南长沙410128

出　　处：《山东农业科学》2016年第5期89-92,共4页Shandong Agricultural Sciences

基　　金：国家自然科学基金项目"土地利用系统功能分类"(41171176)

摘　　要：研究土地生态功能价值变化对土地资源的可持续利用和生态环境保护具有重大意义。基于遥感和Arc GIS平台,利用洞庭湖区2001年及2011年遥感影像数据进行土地利用分类;通过对中国陆地生态系统单位面积价值的粮食产量修正,分析洞庭湖区土地生态功能价值及其变化特征。结果表明：草地、水体和未利用地面积减少,草地减少最多;建设用地、农用地和林地面积增加,建设用地增加最多。2001~2011年洞庭湖区土地生态功能价值减少了2.555亿元,变化率为-1.47%,减少的价值主要体现在废物处理、土壤形成与保护生态功能上,建设用地扩张、草地退化是导致土地功能价值降低的主要原因。Studying on the change of land ecological function value has great significance to the sustainable use of land resources and ecological environment protection. Based on the remote sensing and Arc GIS platform,the image data in 2001 and 2011 were used to make land use classification. Through revising the value per unit area of terrestrial ecosystem in China by means of grain output method,the value of land ecological function and its change characteristics in Dongting Lake were analyzed. The results showed that the areas of grassland,water land and unused land decreased,and the grassland decreased the most; those of construction land,farmland and woodland increased,and the construction land increased the most. The land ecological function value of Dongting Lake decreased by 255. 5 million yuan with the annual change rate of- 1. 47%from 2001 to 2011. The reduced value was mainly in waste treatment,soil formation and ecological function protection. The decrease of land ecological function value was mainly attributed to the rapid expansion of construction land and grassland degeneration.

关 键 词：土地生态功能 土地利用变化 生态功能价值 洞庭湖区 

分 类 号：F301.24[经济管理—产业经济]