摘要
沙区作为典型的生态脆弱区,是土地利用研究的重点区域之一.选择陕北榆阳沙区,建立了沙区土地功能分类系统,基于多期遥感数据(1986年,1996年和2005年)和GIS空间分析方法,研究了该区的土地利用变化和土地利用模式.结果表明:榆阳沙区20年来生产用地和生活用地面积增加,且生产用地增长幅度大于生活用地,生态用地比例略有减少但始终占绝对优势,生态环境状况整体好转;榆阳沙区存在自村中心向外依次为耕地-居民地灌草地夹杂分布-裸沙地、居民地耕地夹杂分布-灌草地-裸沙地和耕地-居民地-灌草地-裸沙地3种典型土地利用模式,且其安全性逐步变差.研究可为协调沙区土地利用与生态建设、创建环境友好型土地利用模式、构建良好人居环境提供科学依据.
Desert as a typical ecologically vulnerable area is important for research on land use. This paper selected Yuyang desert in northern Shannxi as the study area. Land use change and land distribution models were studied by building desert land function classification system, with support of TM images （1986, 1996 and 2005） and spatial analysis methods. Data showed that industrial land and living land increased in the last 20 years, but the former increased faster than the latter. Ecological security in Yuyang desert became better than before, ecological land now occupies most of the study area. Three typical land use patterns were found from middle to edge of the area. 1） farmland, residential area, shrub and grassland, sand, 2） residential area, farmland, shrub and grassland, sand, 3） residential area, farmland, shrub, grassland, and sand. This study provides scientific support for performing environmental sound land use in desert areas.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第4期439-443,F0003,共6页
Journal of Beijing Normal University(Natural Science)
基金
国家科技支撑计划资助项目(2006BAD26B03)
国家科技攻关计划资助项目(2005BA517A06)
关键词
土地功能分类
土地利用变化
模式
榆阳沙区
a functional land classification system
land use change
land use pattern
Yuyang desert
