Simulating river flow velocity on global scale

Flow velocity in rivers has a major impact on residence time of water and thus on high and low water as well as on water quality. For global scale hydrological modeling only very limited information is available for simu
Flow velocity in rivers has a major impact on residence time of water and thus on high and low water as well as on water quality. For global scale hydrological modeling only very limited information is available for simulating flow velocity. Based on the Manning-Strickler equation, a simple algorithm to model temporally and spatially variable flow velocity was developed with the objective of improving flow routing in the global hydrological model of Water- GAP. An extensive data set of flow velocity measurements in US rivers was used to test and to validate the algorithm before integrating it into WaterGAP. In this test, flow velocity was calculated based on measured discharge and compared to measured velocity. Results show that flow velocity can be modeled satisfactorily at selected river cross sections. It turned out that it is quite sensitive to river roughness, and the results can be optimized by tuning this parameter. After the validation of the approach, the tested flow velocity algorithm has been implemented into the WaterGAP model. A final validation of its effects on the model results is currently performed.
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Metadaten
Author:Kerstin Schulze, Martin Hunger, Petra Döll
URN:urn:nbn:de:hebis:30-37388
URL:http://www.adv-geosci.net/5/133/2005/adgeo-5-133-2005.html
DOI:http://dx.doi.org/doi:10.5194/adgeo-5-133-2005
ISSN:1680-7340
ISSN:1680-7359
Parent Title (English):Advances in geosciences
Publisher:Copernicus-Ges.
Place of publication:Katlenburg-Lindau
Document Type:Article
Language:English
Date of Publication (online):2005/12/16
Date of first Publication:2005/12/16
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2007/02/16
Volume:5
Pagenumber:4
First Page:133
Last Page:136
Note:
© Author(s) 2005. This work is licensed under a Creative Commons License.
HeBIS PPN:191043176
Institutes:Geowissenschaften
Dewey Decimal Classification:550 Geowissenschaften
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 3.0

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