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A combined hydrologic and hydraulic modeling approach for testing efficiency of structural flood control measures

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  • Gülay Gül
  • Nilgün Harmancıoğlu
  • Ali Gül

Abstract

The necessity of estimating the degree and spatial extent of positive impacts with regard to protecting communities and properties through potential flood control projects can be considered one of the main reasons for performing flood modeling. This paper presents an overall systematic approach based on the simulation of some extreme event conditions, using a hydrological model to generate the resulting river flows and then using a hydraulic modeling exercise to decide upon floodplain evolution in the case-study area, Bostanli river basin, which has been under the threat of flooding for many years. The potential serviceability of the planned Bostanli Dam in the study area was examined by using the HEC-HMS and HEC-RAS modeling tools, both integrated with GIS functions for spatial operations. The results indicate that the dam construction as planned would have a somewhat positive impact as a potential flood control measure, since it seems to decrease the flood peaks of 68.9 and 158.7 m 3 /s (that would potentially be generated by 100- and 500-year storm events under current conditions) to 65.5 and 150.7 m 3 /s (when the dam is in operation), respectively. However, this seems to contribute little to the overall flood mitigation performance in the basin. Copyright Springer Science+Business Media B.V. 2010

Suggested Citation

  • Gülay Gül & Nilgün Harmancıoğlu & Ali Gül, 2010. "A combined hydrologic and hydraulic modeling approach for testing efficiency of structural flood control measures," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 54(2), pages 245-260, August.
    • Handle: RePEc:spr:nathaz:v:54:y:2010:i:2:p:245-260
    DOI: 10.1007/s11069-009-9464-2
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    References listed on IDEAS

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    1. J. Lastra & E. Fernández & A. Díez-Herrero & J. Marquínez, 2008. "Flood hazard delineation combining geomorphological and hydrological methods: an example in the Northern Iberian Peninsula," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 45(2), pages 277-293, May.
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