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| Titel |
A hydro-sedimentary modeling system for flash flood propagation and hazard estimation under different agricultural practices |
| VerfasserIn |
N. N. Kourgialas, G. P. Karatzas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 14, no. 3 ; Nr. 14, no. 3 (2014-03-18), S.625-634 |
| Datensatznummer |
250118336
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| Publikation (Nr.) |
 copernicus.org/nhess-14-625-2014.pdf |
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| Zusammenfassung |
| A modeling system for the estimation of flash flood flow velocity and
sediment transport is developed in this study. The system comprises three
components: (a) a modeling framework based on the hydrological model HSPF,
(b) the hydrodynamic module of the hydraulic model MIKE 11 (quasi-2-D), and
(c) the
advection–dispersion module of MIKE 11 as a sediment transport model. An
important parameter in hydraulic modeling is the Manning's coefficient, an
indicator of the channel resistance which is directly dependent on riparian
vegetation changes. Riparian vegetation's effect on flood propagation
parameters such as water depth (inundation), discharge, flow velocity, and
sediment transport load is investigated in this study. Based on the obtained
results, when the weed-cutting percentage is increased, the flood wave depth
decreases while flow discharge, velocity and sediment transport load
increase. The proposed modeling system is used to evaluate and illustrate the
flood hazard for different riparian vegetation cutting scenarios. For the
estimation of flood hazard, a combination of the flood propagation
characteristics of water depth, flow velocity and sediment load was used.
Next, a well-balanced selection of the most appropriate agricultural cutting
practices of riparian vegetation was performed. Ultimately, the model results
obtained for different agricultural cutting practice scenarios can be
employed to create flood protection measures for flood-prone areas. The
proposed methodology was applied to the downstream part of a small
Mediterranean river basin in Crete, Greece. |
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