塔里木河下游输水区景观与植被变化分析  

Study on Landscape Change and Vegetation Restoration in the Lower Reaches of Tarim River

作　　者：牛婷[1] 李霞[1,2] 

机构地区：[1]新疆农业大学林学院,乌鲁木齐830052 [2]新疆农业大学草环学院,乌鲁木齐830052

出　　处：《遥感信息》2008年第5期68-73,共6页Remote Sensing Information

基　　金：国家自然科学基金(30460010);教育部科学技术研究重点项目(205183);新疆维吾尔自治区高校科研计划项目(XJEDU2004119)资助

摘　　要：对塔里木河下游输水区植被分布主要区域2000、2002年ETM、2004、2006年ASTER影像景观特征值、景观格局分析,结果表明：2000年输水后,研究区（193726hm^2）天然植被面积迅速扩大并呈连片趋势,沙地斑块数量增加但面积减少、聚集度明显减小;除了沙地外其他各地类斑块密度、数量减少,平均斑块面积扩大,各景观类型呈聚集趋势,景观分布趋于连片。转移矩阵计算表明,2000-2006年输水区4275hz^2疏林地转化为有林地;4573hm2中、低覆盖度灌草地转化为高覆盖度灌草地;18729hm^2低覆盖度灌草地转化为中覆盖度灌草地;2230hm2沙地转化为灌草地,输水后研究区植被面积增加了7345hm^2。生态输水有效地遏制了沙漠化扩展。This article analyzed landscape eigenvalue and landscape pattern from the ETM（2000,2002） and ASTRE（2004,2006） satellite images of the main area where vegetation distributed in the lower reaches of Tarim river. The results showed., the natural vegetation area in studied region （193726hm^2） spread quickly and presented merging tendency evidently after water transport in the year of 2002. In addition, the amount of sand patch increased while sand patch area decreased and assembling extent weakened obviously. The density and amount of sand patch trended to reduce but average area trended to expands various landscape types trended to assemble and also landscape distribution trended to connect. The transfer matrix showed.. 4275hm^2 rare woodlands turned into woodlands in water transport region from the year of 2000 to 2006 ; 4573hm^2 middle and low coverage of shrub or grass lands turned into high density covered lands, 18729hm^2 low shrub or grass covered lands turned into middle covered shrub or grass lands; 2230hm^2 sand-land was covered by shrub or grass. There was 7345hm^2 increased vegetation area in the 7 years from 2000 to 2006 after water transport. Ecology-watertransport could prevent desert spreading efficiently.

关 键 词：景观格局变化 塔里木河 ASTER ETM 遥感 

分 类 号：X171.4[环境科学与工程—环境科学]