CAJ | 학술논문

湖泊作为区域地表水循环中的一个重要载体，对区域的水资源环境平衡发挥着重要作用。本文运用遥感技术，以2010年ETM＋作为数据源，对遥感图像进行预处理之后，通过应用缨帽变换、归一化差分水体指数（ ND-WI）和增强型水体指数（EWI）3种方法，分别对云南省大理州洱海2010年的水域面积进行提取，比较方法准确性。通过对比效果得出，针对取洱海水域面积3种方法提取效果都非常好，其中归一化差分水体指数法能够更为准确而且快速的提取出水体面积。
호박작위구역지표수순배중적일개중요재체，대구역적수자원배경평형발휘착중요작용。본문운용요감기술，이2010년ETM＋작위수거원，대요감도상진행예처리지후，통과응용영모변환、귀일화차분수체지수（ ND-WI）화증강형수체지수（EWI）3충방법，분별대운남성대리주이해2010년적수역면적진행제취，비교방법준학성。통과대비효과득출，침대취이해수역면적3충방법제취효과도비상호，기중귀일화차분수체지수법능구경위준학이차쾌속적제취출수체면적。
As an important carrier of regional surface water cycle , lake plays an important role on the re-gional balance of water resources environment .The paper used remote sensing technology ,took ETM+in 2010 as the data source to preprocess remote sensing image ,and applied three methods such as tasseled cap transformation, normalized difference water Index (NDWI) and the enhanced water index (EWI) to respectively extract the water area in Erhai of Dali prefecture of Yunnan province in 2010 and compare the accuracy every method .The result indicated that the effect of extracting by three methods for the Er-hai lake water area are very good .The method of normalized difference water index can extract water area accurately and fast .