Investigating the Effect of Rainfall Spatial Distribution on Flood in Bakhtiari Dam Basin Using HEC-HMS
الموضوعات :
1 - گروه علوم و مهندسی آب، دانشگاه آزاد اسلامی واحد اهواز، ایران.
الکلمات المفتاحية: HEC-HMS, مدل HEC-HMS, Flood index, Rainfall spatial distribution, Bakhtiari basin, شاخص سیل خیزی, توزیع مکانی بارندگی, حوضه آبریز سد بختیاری,
ملخص المقالة :
The disparate spatial and temporal distribution of rainfall in the country and climate variation sometimes leads to rivers flooding and large flood events, which are remarkable for life and financial losses. Flood control design requires accurate knowledge of the flood generator basin, especially smaller ones, in large basins. Determining the potential of flood generation to specify the quantitative contribution of each subbasin to the downstream flood generation can be used to determine the index called the flood index of each subbasin. In this research, the effect of rainfall spatial distribution of critical rainfall on the flood potential of the Bakhtiari dam basin was analyzed using HEC-HMS model. The results showed that the effect of spatial distribution of rainfall on the flood index is significant, especially when faced with larger events with more subbasins with more area. On the other hand, the priority of participation of each subbasin in routing on the peak discharge from the basin and eventually on the flood index will be effective. Increasing the depth of rainfall in subbasins with less time of concentration has more effect on the flood index. Different spatial distributions have less effect on flood index in subbasins with the higher time of concentration and area. The results also showed that if the effect of the spatial distribution was not considered, the flood index decreases with increasing the subbasin area.
Ahoori .,m. Khosroshahi., F and Arhami., M. (2011). Investigation of urban development on runoff excess. National Hydraulic Conferences. Shahhrekord university.
Dushmanta Dutta A., and Srikantha Herath Katumi M. (2003). A mathematical model for flood loss estimation. Journal of Hydrology, 277(1), pp: 24-49.
Forozani., A. (2005). Determination effects of flood hydrograph and suitable scenario selection for flood control. Msc. Theses, Tarbiat Modarres University.
Ghaemi., H. (2000). Study of watershed management in Karkheh basin. Iran Ministery of Agriculture.
Hydrologic Engineering Center., (HEC) (2000). Hydrologic modeling system HEC–HMS: technical reference manual, U.S. Army Corps of Engineers, Hydrologic Engineering Center, Davis, Calif.
Iranian National committee of irrigation and drainage. (2006). Flood forecast and alert. 250 p.
Islam., M and M., Sado K. (2000). Development of Flood hazard maps of Bangladesh using NOAA-AVHRR images with GIS. Hydrolic Science Journal. 45(3), pp:337-355.
Jonkmana., and S.N. M. Bokarjovab, M. Kokc P. Bernardinid. (2008). Integrated hydrodynamic and economic modelling of flood damage in the Netherlands. Ecological Economics. 66(1), pp:77-90.
Juracek, K. E. (2000). Estimation and comparison of potential runoss contributing areas in Kansas using topographic, soil, and land use information. USGS Water Resources Investigations Ref. 00-417, 28.
Moradinejad., M. jourgholami., M. and Malekian., A. (2014). investigation of HEC-HMS model on flood hydrograph simulation in Kheyrood watershed. Jungle and woods journal. 68(2), pp:625-639.
Nasri., M. and Soleymani Sardo., F. (2011). prioritization of regions effects on peak flow discharge using HEC-HMS model in Sheikh Bahaee Dam. Journal of nature science and technology. 6(3), pp:1-15.
Razavi zadeh., S. Salajegheh., A. khalighi Sigaroodi., Sh. And Jafari., M. (2014). effect of land use changes on flood using HEC-HMS in Taleghan watershed. Journal of Pasture and Watershed Management. 66(3):373-386.
Reyni., L. and Nan., L. (2002). Flood area and damage estimation in Zhejiang, China. Journal of Environmental Management. 66, pp:1-8.
Sadeghi., H. (2002). Runoff producing in basins using spatially distributed model. Iranian National committee of irrigation and drainage conference. 10-20.
Saghafian., B. and Khosroshahi., M. (2005). Unit response approach for priority determination of flood source areas, Journal of Hydrologic Engineering, ASCE.
Saghafian., B. B. Ghermezcheshmeh., M. M. Kheirkhah. (2010). Iso-flood severity mapping: a new tool for distributed flood source identification. Natural Hazard, 55(2), pp:557-570.
Saghafian., B. Hassan FarazjooBabak BozorgyFarhad Yazdandoost. (2008). Flood Intensification due to Changes in Land Use. Water Resources Management. 22(8), pp:1051-1067.
Saghafian B. B. Ghermez cheshmeh. (2008). Spatial Variation of Flood Severity Index. Iran-Water Resources Research, 4(1), pp:28-39.
United States Department of Agriculture (1986). Urban Hydrology for Small Watersheds, TR-55.