1975—2010年石羊河流域绿洲时空演变研究  

Spatial-temporal Evolution of the Oasis in Shiyanghe River Basin in 1975-2010

作　　者：文星[1] 王涛[1] 薛娴[1] 段翰晨[1] 廖杰[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,甘肃兰州730000

出　　处：《中国沙漠》2013年第2期478-485,共8页Journal of Desert Research

基　　金：国家重点基础研究发展规划项目(2009CB421308)资助

摘　　要：应用RS和GIS技术,以石羊河流域绿洲为研究对象,对1975—2010年流域绿洲的时空动态变化进行了监测,并结合气候变化、地表径流量和人类活动等资料探讨了绿洲变化的原因。结果表明:近35年来,石羊河流域绿洲整体规模呈波动变化的趋势,1975、1990、2000年和2010年,流域绿洲总面积分别为7 563.06、7 730.62、7 131.56km2和7 459.43km2。通过分析绿洲与荒漠面积之间的转化发现绿洲主要经历了"绿洲化-荒漠化-再绿洲化"的过程,绿洲面积缩小了103.63km2。绿洲内部耕地、城镇居民地和水域面积增加,而林地和草地面积缩小。绿洲的变化受自然因素和人类活动的共同作用,但人口数量的增加、经济的发展以及地表径流的变化对绿洲演变的影响更为显著。Basing on the technology of RS （Remote sensing） and GIS （Geographic information system）, tak- ing the oasis in the Shiyanghe River Basin as the research object, we monitored its spatial-temporal dynamic changes from 1975 to 2010, and discussed the reasons for the change of the oasis with climate, surface run- off and human activities data. Results show that the oasis scale in the Shiyanghe River Basin presented fluctuation trend in recent 35 years. The areas of oasis in 1975, 1990, 2000 and 2010 were 7 563.06, 7 730.62, 7 131.56 km2 and 7 459.43 km2, respectively. Through analyzing the transformation between oasis and desert, we found the transformation experienced the process of ＂oasification-desertification-oasifi- cation＂ and the area of oasis reduced by 103.63 km2. The area of cultivated land, residential land and water area expanded obviously, but the forest land and grassland reduced. The variation of oasis area was affected by natural factors and human activities together, but the population increase, economic development and the change of surface runoff had significant influence on the evolution of oasis.

关 键 词：绿洲 遥感监测 动态变化 石羊河流域 

分 类 号：X144[环境科学与工程—环境科学]