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| Titel |
Satellite remote sensing of water turbidity in Alqueva reservoir and implications on lake modelling |
| VerfasserIn |
M. Potes, M. J. Costa, R. Salgado |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 6 ; Nr. 16, no. 6 (2012-06-06), S.1623-1633 |
| Datensatznummer |
250013324
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| Publikation (Nr.) |
 copernicus.org/hess-16-1623-2012.pdf |
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| Zusammenfassung |
The quality control and monitoring of surface freshwaters is crucial, since
some of these water masses constitute essential renewable water resources
for a variety of purposes. In addition, changes in the surface water
composition may affect the physical properties of lake water, such as
temperature, which in turn may impact the interactions of the water surface
with the lower atmosphere.
The use of satellite remote sensing to estimate the water turbidity of
Alqueva reservoir, located in the south of Portugal, is explored. A
validation study of the satellite derived water leaving spectral reflectance
is firstly presented, using data taken during three field campaigns carried
out during 2010 and early 2011. Secondly, an empirical algorithm to estimate
lake water surface turbidity from the combination of in situ and satellite
measurements is proposed. Finally, the importance of water turbidity on the
surface energy balance is tested in the form of a study of the sensitivity
of a lake model to the extinction coefficient of water (estimated from
turbidity), showing that this is an important parameter that affects the
lake surface temperature. |
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