摘要
以多时相Landsat TM/ETM+影像、CBERSCCD影像和早期1∶10万地形图为数据源,选取羌塘高原东南部22个面积较大的湖泊作为研究对象,借鉴城市扩展研究的思路,引入变化强度指数和象限方位分析等方法,从面积、强度和空间分异特征等多个方面对该区湖泊近30年来的变化进行分析.结果表明,1975-2005年间研究区湖泊呈扩张趋势,总面积共扩大了1162.19km2;色林错扩张面积最多,达510.02km2,以北部扩张最为明显;国加轮湖扩张强度最大;造成区域内湖泊面积扩张的主要因素是冰雪融水量的增加、降水量的增多以及蒸发量的减少.
This study presented a remote sensing/GIS-based method to monitor changes of lakes in the southeast of Qiangtang area,Qinghai-Tibet Plateau.The Landsat TM/ETM＋ and CBERS CCD images together with 1：100000 topographic maps were applied to research 22 lakes from the area.Methods of changing intensity index and quadrant-azimuth analysis were used to mainly research the urban expansion.The lakes area in recent 30 years were analyzed by changing intensity and spatial differential features.The results showed that the lake area had an expanding trend from year 1975 to 2005,and the total area had enlarged about 1162.19km2.Among these lakes,the Selin Co had expanded the largest area with 510.02km2 and significant expanding northwards.Meanwhile,the Lake Guojialun had the highest changing intensity in the area.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2010年第6期874-881,共8页
Journal of Lake Sciences
基金
科技部基础性工作专项"中国湖泊水质
水量和生物资源调查"项目(2006FY110600)资助
关键词
湖泊变化
羌塘地区
青藏高原
遥感
Changes of lakes
Qiangtang area
Qinghai-Tibet Plateau
remote sensing
