利用遥感数据提取水体，是水资源和洪涝灾害监测的重要手段及其理论基础。
Water body extraction is the theoretical foundation of water resource and flood disaster monitoring.
水面镜面反射会产生太阳耀光，直接影响水体遥感信息的提取和利用。
The mirror reflectance of water surface produces the sun glitter, it is unable to draw water body information from the total radiation at all.
以洞庭湖水体富营养化监测为最终目的，由此确定了最佳水体遥感提取模型为MNDWI指数模型。
The purpose of monitoring the eutrophication of Dongting lake areas is taken, so the MNDWI model was selected for water body extraction.
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