中国生态脆弱区土地可持续利用评价研究

RESEARCH ON THE EVALUATION OF LAND USE SUSTAINABILITY IN ECOLOGICALLY FRAGILE REGION IN CHINA

关键词:  生态脆弱区 县域 土地可持续利用评价

Key words:  ecologically fragile region  county  evaluation of land use sustainability

摘要:

该文以县域为研究单元，针对中国黄土高原区、北方农牧交错区、西北干旱风沙区、西南岩溶区 和三江源区等生态脆弱区域，从环境支持性、资源保护性、经济可行性和社会可接受性等四方面建立了土 地可持续利用评价体系，综合评价了各区的土地利用可持续性程度及其空间分布特征。结果表明:黄土高 原区和三江源区的弱度、较弱可持续性等级县数比例各为55.14%和87.5%，整体可持续性较低;其余 三区强度和较强可持续性等级的县比重均超过或接近40%，可持续性相对较高。从空间上看，新疆昆仑山 北坡绿洲区、黄土高原丘陵沟壑区、宁夏南部山区、青海三江源区和贵州南部岩溶山区是弱度土地可持续 性的主要聚集区。

Abstract:

Taking China's ecologically fragile region as the research object， i.e.， the Loess Plateau Region， the Northern Farming-pastoral Region， the Northwestern Arid and Sandy Region， the Southwestern Karst Region and the Sanjiangyuan Region， this paper evaluated the county-based land use sustainability and spatial distribution characteristics based on the evaluating indicators for sustainable land use from four aspects of environmental sup- port， resource protection， economical viability and social acceptability. The results showed that the counties with the weak sustainability grade in the Loess Plateau Region and the Sanjiangyuan Region were 55.4% and 87. 5%， respectively， which indicated the sustainability was relatively low， while the counties with high sustainability grade were about 40% which indicated the sustainability was relatively high. In the view of the spatial distribution， the counties with the weak grade of land use sustainability mainly distributed the oasis area of northern Kunlun in Xinjiang， the hilly-gullied region in Loess Plateau， the mountainous area in southern Ningxia， the Sanjiangyuan Region in Qinghai， and the Karst mountainous area in southern Guizhou.