Document Type : Research Paper

Authors

1 PhD, Civil Engineering Group, Imam Hossein Comprehensive University, Tehran, Iran

2 PhD Scholar, Department of Civil and Environmental Engineering, Amirkabir University of Technology, Tehran,, Iran

Abstract

In Sistan and Baluchestan Province, the rivers are prone to flooding, but few studies have assessed the floods in these rivers. Given the substantial importance of the border rivers in this province, flood hydraulics for four border rivers, namely Mashkil, Surin, Gezo, and Biraban, were studied in this research. To this end, hydraulic modeling of floods and preparation of flood zone maps with 2- and 50-yr return periods were performed using the HEC-RAS model, ArcGIS software, and HEC GeoRAS extension. According to the calculation and comparison of various hydraulic parameters, in 2-year return period discharge or dominant discharge, the Mashkil river had the highest depth and extent of floods, and the Gozo river had the highest average flood velocity among the studied rivers. In the 50-year return period discharge, Mashkil and Gozo rivers had a greater potential for flooding. Finally, comparing the ratio of changes in different hydraulic parameters with the change of flood return period from 2 to 50 years indicated that the increase of discharge (5.8-28.3 times) in the studied rivers had greater effects on the flood volume (3.3-7.8 times) and its extent (2.3-4.5 times).

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Abdollahzadeh, A., Ownegh, M., Sadoddin, A. and Mostafazadeh. R. (2016). ‎Constraints to residential land use development arising from flood ‎and runoff coefficient in a land use planning framework, case study: ‎Ziarat Watershed, Golestan Province. Watershed Eng. Manage., 8(2), 221-235. DOI: 10.22092/ijwmse.2016.106462 [In Persian].
Amini, A., Bahrami. J. and Miraki, A. (2021). Effects of dam break on downstream dam and lands using GIS and Hec Ras: a decision basis for the safe operation of two successive dams. Int. J. River Basin Manage., DOI: 10.1080/15715124.2021.1901728
Bakhtiari, M., Kashefipour, S. M. and Asghari Pari, S. A. (2012). Evaluation the effect of transverse structures on the flood plain using hydraulic model Hec-Ras in Geographic Information Systems (GIS). J. Irrig. Sci. Eng., 35(3), 37-46 [In Persian].
Daneshfaraz, R., Dasineh, M. and Ghaderi, A. (2019). Evaluation of scour depth around bridge piers with HEC-RAS (Case study: bridge of Simineh Rood Miandoab, Iran). Environ. Water Eng., 5(2), 91-102. DOI: 10.22034/jewe.2019.177408.1310 [In Persian].
Derakhshan, S. H., Gholami, V. and Taghva Salimi, E. (2011). Modeling of Goharrood and Siahrood rivers hydraulic behavior with GIS and HEC-RAS. J. Geog. Sci., 16(19), 65-79 [In Persian].
Earth Data, NASA. (2020). Alaska Satellite Facility (ASF) DAAC. Available online at: https://earthdata.nasa.gov/, Accessed 18, Auguest 2020.
Hejazi, A., Khodaie Gheshlagh, F. and Khodaie Gheshlagh, L. (2019). Zoning the villages at flood risk in the Varkesh-Chai drainage basin by GIS and HEC - RAS software and HEC- GEO - RAS extension. J. Appl. Res. Geog. Sci., 19(53), 137-155. DOI: 10.29252/jgs.19.53.137 [In Persian].
Hosseini, S. M., Jafar-Beiglu, M. and Geravand, F. (2015). Modeling of hydraulic behavior of Kashkan river and determination of floodplain limits using HEC-GEO-RAS. Environ. Hazard. Manage., 2(3), 355-369. DOI: 10.22059/jhsci.2015.58102
Iran Water Resources Management Company. (2020). Water Resources Base Studies Bureau, Statistics and Reporting System, Available on: http://wrbs.wrm.ir. Accessed 7, September 2020.
Iran’s Ministry of Energy. (2016). Guideline for determination of the hydraulic roughness coefficient of rivers. Bureau of Technical, Engineering, Social and Environmental standards of water and waste water. Publication No. 688 [In Persian].
Jahanbakhsh, S. Rezaei Banafsheh, M. and Sadrafshari, S. (2012). Flood zoning of the Kalqan river by rainfall-runoff analysis by HEC-RAS model. J. Geog. Notion. 6(12). 127-144 [In Persian].
Kazemi, A., Rezaei Moghaddam, M. H., Nikjoo, M. R., Hejazi, M. A. and Khezri, S. (2017). Zoning and management of the hazards of floodwater in the Siminehrood river using the HEC–RAS hydraulic model. Environ. Hazard. Manage., 3(4), 379-393. DOI: 10.22059/jhsci.2016.62373 [In Persian].
Liang, S. and Mohanty, C. R. C. (1997). Optimization of GIS-based flood hazard zoning - a case study at the Mahanady command area in Cuttack district, Orrisa, India. J. Chin. Soil Water Conserv., 28(1). 11-20.
Miraki, A., Bahrami, J. and Amini, A. (2020). Investigation of flood characteristics due to dam failure in the narrow section of the river. Environ. Water Eng., 6(4), 388-401. DOI: 10.22034/JEWE.2020.245577.1411
Mostafazadeh, R., Mirzaei, S., Esmali, A. and Zabihi, M. (2018). Sensitivity analysis of the flow hydrograph components due to changes in Clark's time-area model in Mohammad-Abad watershed, Gloestan Province. Iran. J. Soil Water Res., 49(1), 91-99. DOI: 10.22059/ijswr.2018.221333.667580
Patel, C. G. and Gundaliya, P. J. (2016). Floodplain delineation using HEC-RAS model - a case study of Surat city. J. Mod. Hydrol., 6(1), 34-42. DOI: 10.4236/ojmh.2016.61004
Rezaei Moghadam, M. H., Rajabi, M., Daneshfaraz, R. and Kheirizadeh, M. (2016). Zonation and investigating the morphological effects of flooding on Zarrineh-roud river (from Sariqamish to Noruzlu dam).  Geogr. Environ. Hazard., 5(1), 1-20. DOI: 10.22067/geo.v5i1.52330 [In Persian].
Suwanwerakamtorn. R. (1994). GIS and hydrologic modeling for management of small watersheds. ITC J., 4, 343-349.
Tate, E. and Maidment, D. (1999). Floodplain mapping using HEC-RAS and ArcView GIS. Center for Research in Water Resources, Report 99-1, The University of Texas at Austin, Austin, USA. 215 pp.
Usul N. and Turan, B. (2006). Flood forecasting and analysis within the Ulus basin, Turkey, using geographic information systems. Nat. Hazard., 39, 213-229. DOI: https://doi.org/10.1007/s11069-006-0024-8
Wolman, M. G. (1955). The natural channel of Brandywine Creek, Pennsylvania. USGS Numbered Series, Professional Paper 271, Pennsylvania, USA. 56 pp. DOI: 10.3133/pp271
Yamani, M., Toorani, M. and Chezghe. S. (2012). Determination of the flooding zones by using Hec-Ras model (Case study: upstream the Taleghan dam). J. Geogr. Environ. Hazard., 1(1), 1-16. DOI: 10.22067/geo.v1i1.16519 [In Persian].