Estimating surface water area changes using time-series Landsat data in the Qingjiang River Basin, China

摘要: The Qingjiang River Basin, which is 423 km long in the Hubei province, China, first large tributary of Yangtze below Three Gorges. Basin surface water area monitoring plays an important role resource management strategy and regular watershed. Hydropower cascade exploitation, started 1987, has formed three reservoirs including Geheyan reservoir, Gaobazhou Shuibuya reservoir midstream downstream Basin. They have made a great impact on changes need to be taken into account. We monitor from 1973 2010. Ten scenes Multispectral Scanner System (MSS), seven Thematic Mapper (TM), two Enhanced Plus (ETMþ) remote sensing data Landsat satellites, normal- ized different index (NDWI), modified NDWI (MNDWI), Otsu image segmenta- tion method were employed quantitatively estimate 1970s, 1980s, 1990s, 2000s, respectively. results indicate that shows growing trend with hydropower development 1980s decade 21st century. study concluded significance human activities spatiotemporal distribution. Surface accretion significant most parts might related constructed dams. © 2012 Society Photo-Optical Instrumentation Engineers (SPIE). (DOI: 10.1117/1.JRS.6.063609)