滇池遥感水污染变迁分析研究

研究分别利用经验模型和混合光谱的线性分解模型计算了滇池水质的水污染变迁分析分布，利用波段运算得到特征波段（PRWI），经过图像增强处理后提取水体和居民地混合信息。在此基础上通过分析水体的光谱特征，发现水体和居民地在近红外和短波红外上有显著差异，采用决策树模型将水体专题信息提取出来。运用目视判读和定量统计分析方法来评价提取结果得到不同时相的滇池污染分布图。结果表明混合光谱的线性分解模型在水质遥感应用中可以充分的利用遥感影像的多光谱数据，不同水质的水体在遥感图像上有较明显的反映，在内陆湖泊的水质水污染变迁分析研究提取应用中具有通用性。

Research and Analysis on the Changing of Water Pollution of Dian Lake by RS

This research reckons the distributing change of Dian Lake pollution with the using of empirical model and linear spectral mixing analysis. It is based on wave factor reckon to get the character wave factor （PRWI）, and to get the mixed information of water and resident area with strengthened graph. The paper uses the analysis method of eye-sight judge and quantity statistics to evaluate the result so as to get the water pollution statue picture in different time. The result of research shows that it can be commonly used for the extracting application on analysis of water pollution changing in interior lake.