Estimation of total suspended matter in the Zhujiang (Pearl) River estuary from Hyperion imagery |
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| Authors: | Dazhao Liu Dongyang Fu Bing Xu Chunyan Shen |
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| Institution: | 1. Ocean Remote Sensing and Information Laboratory, Guangdong Ocean University, Zhanjiang, 524088, China
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| Abstract: | Although remote sensing data have been used to estimate total suspended matter (TSM) in coastal waters, it has limitations
when applied to estuary waters in low spatial resolution situations. The spatial resolution of ocean color satellites such
as SeaWiFS and MODIS is usually ∼1 km, and therefore is not adequate for small, local-scale areas such as the Zhujiang (Pearl)
River estuary. In contrast, 30 m-resolution EO-1 Hyperion imagery has potential for studying TSM in localized areas. We measured
the surface spectral radiance reflectance of the river estuary water in the visible and near infra-red spectral range. Sensitivity
analysis indicated that the ratio of remote sensing reflectance at 813 nm (R
rs(813)) to reflectance at 559 nm (R
rs(559)) could be used to estimate TSM concentration, and a linear relationship was established between the ratio and in-situ TSM
concentration. We applied the linear relationship to Hyperion imagery to map TSM concentration in the estuary. The Hyperion
imagery provided sufficient spatial resolution to detect spatiotemporal changes in TSM concentrations in the estuary small
estuary area. This study demonstrated the usefulness of Hyperion imagery for mapping the distribution of TSM in estuary waters. |
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| Keywords: | Hyperion total suspended matter (TSM) Zhujiang (Pearl) River estuary |
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