黄土丘陵区土地利用格局与生态系统服务价值分析——以中庄流域为例

Analysis of Land Use Type and Ecosystem Service Value in Loess Hilly Region——A Case Study of Zhongzhuang Watershed

土地利用、生态系统服务价值的研究对区域生态建设具有重要意义,以黄土高原半干旱黄土丘陵区中庄小流域2000年,2005年和2010年3个时期的土地利用类型为研究对象,利用"3S"技术和生态系统服务价值计算方法,对该流域土地利用类型和生态系统服务价值进行了研究,结果表明:2000—2005年土地利用类型发生了较大的变化,2005—2010年土地利用类型变化较小,10a间土地利用变化主要表现为两减两增(农田、水域的减少和草地、林地的增加)。研究区域总体生态服务价值呈上升趋势,不同土地利用类型生态服务价值也体现为两减两增(农田、水域的减少和草地、林地的增加),土地利用面积与生态系统服务价值具有较强的相关性,退耕还林工程和国家"十五"、"十一五"项目的实施,增加了区域生态系统服务价值。

Land use type and ecosystem service value have important significance on ecosystem construction. Based on land use data in 2000, 2005, and 2010 of Zhongzhuang basin of the Loess Plateau semi-arid loess hilly region, the land use types and ecosystem services value were studied by using the methods of ＂3S＂ technology and ecosystem services value. The results showed that the types of land use had changed greatly from 2000 to 2005, the changes of land use type were small from 2005 to 2010, and land use change was mainly characterized as the decrease of farmland and water body as well as the rise of grassland and woodland during the decade. Ecosystem service values of study area showed a rising trend, ecological service values of farmland and water body decreased, whereas ecological service values of grassland and woodland increased. The correlation between area of land use and ecosystem service value was significant. The implementation of project of returning farmland to forest and the state projects of fifteenth 5-year and eleventh 5-year increased the regional ecosystem service value.