摘要
基于中亚伊塞克湖地区的1991—1998年Landsat-5/TM、1999—2012年Landsat-7/ETM+以及2013—2014年Landsat-8/OLI等遥感影像为主要基础数据,通过采用波段比值法(TM3/TM5)自动提取湖泊边界,并加以人工修订,得出了伊塞克湖1991—2014年多期次的湖泊边界及对应的湖泊面积变化过程。结果显示,伊塞克湖的湖泊面积在1991—1998年间总体减小5.3 km^2,而在1998—2014年间总体增大7.3 km^2。通过与中亚地区Tian Shan气象站记录的气象数据对比发现,伊塞克湖水域面积的变化与气温和降水具有显著的正相关关系,这说明过去20年以来中亚地区气候的暖湿化对伊塞克湖流域具有重大影响。
Based on the central Asia region of Issyk - Kul Lake of Landsat in 1991 - 1998, 1999 - 2012 - 5/TM Landsat 7/ETM ＋ and Landsat in 2013 -2014 -8 / OLI remote sensing image data as the main basis, through the band ratio method （TM3/TM5） auto- matic extraction of lakes boundary, and artificial revision, it is concluded that the 1991 -2014 year period, Issyk - Kul Lake of time lake area boundary and the corresponding process. The results show that the lake area of Issyk - Kul lake decreased by 5.3 km2 be- tween 1991 and 1998, and 7.3 km2 between 1998 and 2014. With central Asia, Tian Shan station records of meteorological data con- trast, found that the change of the waters of the lake area with the temperature and precipitation were significantly positive correlation, this shows that in the past 20 years since the central Asia region climate of wet has significant influence to the riverg lake.
出处
《测绘与空间地理信息》
2018年第2期142-146,共5页
Geomatics & Spatial Information Technology
关键词
伊塞克湖
湖泊面积变化
遥感监测
气候变化
Issyk - Kul Lake
change of lake area
remote sensing monitoring
climate change
