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| Titel |
Estimating river discharge from earth observation measurements of river surface hydraulic variables |
| VerfasserIn |
J. Negrel, P. Kosuth, N. Bercher |
| 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 ; 15, no. 6 ; Nr. 15, no. 6 (2011-06-29), S.2049-2058 |
| Datensatznummer |
250012869
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| Publikation (Nr.) |
 copernicus.org/hess-15-2049-2011.pdf |
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| Zusammenfassung |
River discharge is a key variable for quantifying the water cycle, its fluxes
and stocks at different scales. These scales range from a local scale for the
efficient management of water resources to a global scale for the monitoring
of climate change. Therefore, developing Earth observation (EO) techniques for
the measurement or estimation of river discharge poses a major challenge. A
key question deals with the possibility of deriving river discharge values
from EO surface variables (width, level, slope, and velocity are the only such
variables accessible through EO) without any in situ measurement. Based on a
literature study and original investigations, this study explores the possibilities
of estimating river discharge from water surface variables.
The proposed method relies on limiting assumptions to simplify river flow equations
to obtain the values of the hydraulic parameters at a given river station without
using ground measurements. Once the hydraulic parameters are identified,
the method allows the estimation of the river discharge corresponding to a
set of surface measurements of hydraulic variables. |
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