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首页> 外文期刊>American journal of applied sciences >Assessment of Suspended Sediments Concentration in Surface Waters, Using Modis Images | Science Publications
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Assessment of Suspended Sediments Concentration in Surface Waters, Using Modis Images | Science Publications

机译：使用Modis图像评估地表水中的悬浮沉积物浓度科学出版物

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> Remote sensing from air-borne and space-borne sensors have proved to be a useful method for Suspended Sediment Concentration (SSC) estimation as it provides an instantaneous and synoptic view of suspended sediments that would otherwise be unavailable. The reason for the success of remote sensing in such surveys is the strong positive relationship that exists between SSC and remotely sensed water leaving radiance. To find an algorithm relating SSC to spectral radiance over Bahmansheer River Estuary at the North-West of Persian Gulf, a three-month field expedition (April to June 2003) was conducted while the MODIS sensor on board Terra simultaneously flew over the scene. Fifty seven samples in fifteen trips were collected. The collected samples were analyzed by measuring concentration, diameters of the sediment particles and by determining the sediment constituents. Total concentration ranged between 30 and 500 mg, the range of particle diameter was from less than a micrometer to more than 20 micrometers and finally it was found that the sediment was composed of Quartz, Kaolinite, Orthoclase, Chlorite, Calcite, Gypsum, Muscovite, Halite, Anhydrite, Apatite, Biotite and a low amount of Albite. It is found that the spectral characteristics of these compositions are partly responsible for the reflected and/or scattered energy in different bands while the correlation between larger suspended particle concentration and spectral radiance was profound.
机译： >事实证明，从机载和天基传感器进行的遥感是一种有用的悬浮泥沙浓度（SSC）估算方法，因为它可以提供有关悬浮泥沙的即时和概要的视图，否则将无法获得。在这样的调查中，遥感成功的原因是南南合作与遥感辐射的水之间存在强烈的正相关关系。为了找到将SSC与波斯湾西北部Bahmansheer河口上的光谱辐射相关的算法，进行了为期3个月的野外考察（2003年4月至2003年6月），同时Terra上的MODIS传感器同时飞过现场。在15次旅行中收集了57个样本。通过测量浓度，沉积物颗粒的直径和确定沉积物成分来分析收集的样品。总浓度在30至500 mg之间，粒径范围从小于一微米到大于20微米，最后发现沉积物由石英，高岭石，正长石，亚氯酸盐，方解石，石膏，白云母， Halite，无水石膏，磷灰石，黑云母和少量的阿尔比特。发现这些组合物的光谱特性部分负责不同频带中的反射和/或散射能量，而较大的悬浮粒子浓度和光谱辐射率之间的相关性很深。

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