利用混合光谱分解估测珠江口悬浮泥沙浓度

利用遥感技术估测水体中的悬浮泥沙的浓度已经成为一门成熟的技术，但将其应用于河口地区悬浮泥沙的监测仍然存在一些限制。限制之一是遥感数据（例如MODIS）的空间分辨率太低，不适合应用于河口等狭小水域的监测。相比较而言，Hyperion高光谱遥感数据有196个波段，覆盖400-2500nm的光谱范围，光谱分辨率为10nm,空间分辨率为30m，其高光谱分辨率及高空间分辨率，显示了其在河口水体悬浮泥沙遥感中的巨大潜力。利用2006年12月4号的Hyperion数据、同步实测的高光谱数据及悬浮泥沙浓度数据，对珠江口海域悬浮泥沙浓度进行了研究。利用混合光谱分解模型计算了珠江口悬浮泥沙浓度的分布。分析结果表明，混合光谱分解模型可以作为遥感监测水体悬浮泥沙浓度的定量模型。

Estimation of suspended sediment concentration at Zhujiang River Mouth based on decomposition of mixing spectrum

Although there has been some effort to retrieve suspended sediment concentration(SSC) by using remote sensing data,there are some limitations for the application of this technology in estuary waters partly due to the low spatial resolution of remote sensing data,such as the Moderate Resolution Imaging Spetroradiometer data(MODIS).By comparison,the EO-1 Hyperion instrument,which is capable of resolving 196 spectral bands over the range of 400-2500 nm,with 10-nm wide band and 30-m spatial resolution,has a great potential in studying suspended sediments in estuaries.The authors study the SSC at the Zhujiang River Mouth using the Hyperion images obtained on December 4,2006,along with the real time remote sensing reflectance.The result shows that the mixing spectral decomposition model is a good choice for estimating the SSC using remote sensing data.