摘要
通过对实测光谱数据和水深数据的分析研究发现,泥沙浓度在水深遥感中具有重要意义。泥沙含量决定水体光谱反射率与水深的相关性方向:泥沙含量较少的清水区,光谱反射率与水深呈负线性相关;而在泥沙含量较高的浊水区,光谱反射率与水深数据呈正线性相关。以此为依据,对水体进行清/浊水体的光谱分别处理,可提高水深的光谱反演精度。同时,结合实测水体光谱进行不同光谱分辨率的模拟分析,发现高光谱分辨率遥感将有助于提高水深反演精度。
Sand drift is of vital importance in water - depth remote sensing, as shown by an analysis of the reflectance spectral data and measured water depth data. The concentration of the sand drift decides the direction of the correlation coefficient between the water depth and the reflectance spectra： the correlation coefficient is lower than 0 in the clear area and higher than 0 in the high turbidity area. On such a basis, the water body can be classified before depth extraction so as to improve the depth extraction precision. The high spectral remote sensing technique can raise the extraction precision based on the simulation analysis of different spectra.
出处
《国土资源遥感》
CSCD
2007年第3期89-93,97,共6页
Remote Sensing for Land & Resources
基金
江苏省地质调查研究院委托项目"江苏海岸水下地形多尺度遥感成图关键技术研究"
关键词
光谱
水深
泥沙
TM
遥感
Spectra
Water depth
Sand drift
TM
Remote sensing
