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Journal of Environmental Hydrology
ISSN 1058-3912 |
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Electronic Journal of the International Association for
Environmental Hydrology
JEH Volume 18 (2010), Paper 24 Posted December 14, 2010 ASSESSMENT OF THE FLOOD POTENTIAL RANKING OF SUB-BASINS AND DETERMINATION OF FLOOD SOURCE AREAS
Gholamreza Zehtabiyan1 2Islamic Azad University, Iran ABSTRACT The determination of flood source area and ranking sub-basins according to flood potential can play an important role in a management of large watersheds. The Hassan-Abad watershed, located in southeast Iran, was chosen for a study of the occurrence of floods. Each sub-basin share in the total watershed flood was established by using GIS and the HEC-HMS based SCS CN method. For this purpose, by successively eliminating sub-basins from the simulation process using a unit flood response method, the contribution of each sub-basin to the outlet flood peak was quantified. Results show that not only sub-basin areas influence their share in the total watershed flood potential, but also factors such as their location and flood routing in the main river are of a great importance. The contribution per unit area to the outlet flood peak was used as the basis to rank the sub-basin in terms of their flood potential. Reference: Zehtabiyan, G., J. Ghoddusi, H. Ahmadi, M. Khalilizadeh, and M. Moghali. 2010. Assessment of the flood potential ranking of sub-basins and determination of flood source areas. Journal of Environmental Hydrology, Vol. 18, Paper 24. CONTACT: Mojtaba Khalilizadeh Department of Watershed Management Science and Research Branch Islamic Azad University Tehran, Iran E-mail: mkhz57@gmail.com |
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