Estimating suspended sediment concentrations in turbid coastal waters of the Santa Barbara Channel with SeaWiFS
Estimating suspended sediment concentrations in turbid coastal waters of the Santa Barbara Channel with SeaWiFS
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DOI：
10.1080/01431160310001619535
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发表时间：
2004-05
影响因子：
3.4
通讯作者：
J. Warrick;L. Mertes;D. Siegel;C. Mackenzie
中科院分区：
文献类型：
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作者：
J. Warrick;L. Mertes;D. Siegel;C. Mackenzie
提出了一种利用多光谱遥感数据估算近岸浑浊沃茨悬浮泥沙浓度的方法。该方法改进了许多标准技术，因为它结合了多个波段的分析（四个用于海景宽视场传感器（SeaWiFS））和非线性校准，产生高度准确的结果（预期误差约为±10%）。此外，在过度浑浊的沃茨中由错误的大气校准产生的潜在误差以及溶解的有机材料、叶绿素色素和大气气溶胶的影响受到暗像素减法和去除紫色至蓝色波长带的限制。本文给出了加州圣巴巴拉海峡的结果，该海峡在大型河流径流事件发生后，悬浮泥沙浓度范围为0-200+ mg l−1（±20 mg l−1）。最大的羽流出现在离海岸10-30公里处，紧接着厄尔尼诺冬季大洪水之后。
A technique is presented for estimating suspended sediment concentrations of turbid coastal waters with remotely sensed multi-spectral data. The method improves upon many standard techniques, since it incorporates analyses of multiple wavelength bands (four for Sea-viewing Wide Field of view Sensor (SeaWiFS)) and a nonlinear calibration, which produce highly accurate results (expected errors are approximately ±10%). Further, potential errors produced by erroneous atmospheric calibration in excessively turbid waters and influences of dissolved organic materials, chlorophyll pigments and atmospheric aerosols are limited by a dark pixel subtraction and removal of the violet to blue wavelength bands. Results are presented for the Santa Barbara Channel, California where suspended sediment concentrations ranged from 0–200+ mg l−1 (±20 mg l−1) immediately after large river runoff events. The largest plumes were observed 10–30 km off the coast and occurred immediately following large El Niño winter floods.