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Quantification of bio-physico-chemical properties of intertidal sediment at different spatial scales using remote sensing
Adam, S.; Monbaliu, J.; Toorman, E.A. (2012). Quantification of bio-physico-chemical properties of intertidal sediment at different spatial scales using remote sensing. Int. J. Remote Sens. 33(17): 5347-5365. https://dx.doi.org/10.1080/01431161.2010.494634
In: International Journal of Remote Sensing. Taylor & Francis: London. ISSN 0143-1161; e-ISSN 1366-5901, meer
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- Remote sensing for characterization of intertidal sediments and microphytobenthic algae, meer
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| Abstract |
Coastal-erosion models require accurate and detailed information on bio-physico-chemical properties of intertidal sediments. In this article, the potential of remotely sensed data at different spatial scales for the quantification of sediment properties was assessed. The focus on specific absorption features of water at 1450 nm, clay at 2206 nm and chlorophyll-a at 673 nm provided a physically based approach and interpretable results. The moisture content in unsaturated sediment could be accurately related to absorption (coefficient of determination r 2?=?0.89 and root-mean-square error of prediction (RMSEP)?=?3% relative gravimetric moisture content) in laboratory and field measurements. The empirical model relating chlorophyll-a content with its field absorption (r 2?=?0.6) was successful on airborne sensor measurements. Though suitable in laboratory conditions, the absorption of shortwave infrared light by clay was not observed in field or airborne spectra. The empirical models showed clear dependency on the study area and sensor, suggesting more research on intercalibration of spectrometers and on factors influencing the interaction of light with sediment properties. |
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