 |
| Titel |
Simulating river flow velocity on global scale |
| VerfasserIn |
K. Schulze, M. Hunger, P. Döll |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7340
|
| Digitales Dokument |
URL |
| Erschienen |
In: Proceedings of the 8th Workshop for Large Scale Hydrological Modelling - Oppurg 2004 ; Nr. 5 (2005-12-16), S.133-136 |
| Datensatznummer |
250002178
|
| Publikation (Nr.) |
 copernicus.org/adgeo-5-133-2005.pdf |
|
|
|
|
|
| Zusammenfassung |
| 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 WaterGAP. 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. |
| |
|
| Teil von |
|
|
|
|
|
|
|