A reflectance band ratio used to estimate suspended matter concentrations in sediment-dominated coastal waters
A reflectance band ratio used to estimate suspended matter concentrations in sediment-dominated coastal waters
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DOI：
10.1080/0143116021000009912
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发表时间：
2002-01
影响因子：
3.4
通讯作者：
D. Doxaran;J. Froidefond;P. Castaing
中科院分区：
文献类型：
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作者：
D. Doxaran;J. Froidefond;P. Castaing
这封信提出了一个经验关系式，可用于从遥感反射率测量中估计高度浑浊水域中的悬浮颗粒物浓度。介绍并分析了2000年和2001年在(法国)吉隆德河口水域进行的许多测量。结果表明，近红外(850 Nm)反射率与表层水体中测得的总悬浮物浓度(TSMC)之间存在弱相关性。近红外与可见光(5 5 0 Nm)反射率之比与TSMC值之间有很强的相关性(r=0.91)，可以为地面观测系统(SPOT)、陆地卫星和印度遥感卫星传感器的数据提供准确的定标曲线。反射率降低了光照条件和沉积物类型(粒度、折射率)变化的影响。所得到的定标函数成功地应用于吉隆德河，应该也适用于其他以沉积物为主的沿海水域。
This letter presents an empirical relationship that may be used to estimate the suspended particulate matter concentrations in highly turbid waters from remote sensing reflectance measurements. Numerous measurements carried out in the Gironde estuarine waters (France) in 2000 and 2001 are presented and analysed. It was observed that the near-infrared (850 nm) reflectance was weakly correlated with the total suspended matter concentration ( TSMc ) measured in surface waters. A strong correlation ( r =0.91) was obtained between the ratio of the near-infrared and visible (550 nm) reflectance and TSMc, which could provide an accurate calibration curve for data from Systeme Probatoire de l'Observation de la Terre (SPOT), Landsat and Indian Remote Sensing (IRS) satellite sensors. The reflectance ratio reduced the effects of changes in illumination conditions and sediment type (grain-size, refractive index). The calibration function obtained, successfully applied to the Gironde, should be applied in other sedimentdominated coastal waters.