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通过对长江口南支水域ＬａｎｄｓａｔＴＭ遥感图像进行水深专题信息的增强处理，选择ＴＭ４／ＴＭ２波段组合，结合当地同一时期实测水下地形图资料，建立了该水域水深与影像光谱值之间的统计相关关系．分析了影响水深遥感精度的原因并采用幂函数形式的修正项对相关模式进行修正加以解决．提出：图像处理质量的高低和相关公式建立的好坏是提高水深遥感精度的关键所在．
Through the enhancement of the water depth information of the Landsat TM remote sensing image in the Nanzhui waters of the Changjiang Estuary, the TM4 / TM2 band combination was selected and combined with the data of the submarine topographic maps measured at the same time in the local area to establish the relationship between the water depth and the spectral value Statistical correlation. The reason of affecting the precision of remote sensing of water depth is analyzed, and the correction mode of power mode is adopted to solve the correlative mode. Proposed: the quality of image processing and the establishment of good or bad formula is the key to improve the accuracy of remote sensing.