A Simple Model for determining flood hazard areas

Hassas, Hamid; Azizian, Abolfazl; Ghasemi, Mohsen

doi:10.22111/jneh.2020.31011.1549

A Simple Model for determining flood hazard areas

Document Type : Research Article

Authors

¹ MSc. Graduate of Watershed Management, Ardakan University, Ardakan, Iran.

² Assistant Professor, Department of water Science and Engineering, Ardakan University, Ardakan, Iran

³ Ph.D. Graduate of Water Science and Engineering, Isfahan University of technology, Isfahan, Iran

10.22111/jneh.2020.31011.1549

Abstract

Determination of the submergible area by flood provides a fundamental tool for reducing flood risks. Therefore, in this research, flood spreading modeling was designed using web-based software with the capability of zoning submerged areas by Google Maps DEM Data. For this purpose, at the first, a specified interval of a river is selected on the map. Then, at each selected section, the maximum cross-sectional area for passing flow is calculated. Then, based on the average of the cross-section area for the total interval and the physical properties of the selected river interval, the maximum flow rate is calculated. For this flow rate, the safe area of the flood is marked on the map. For a greater flow rate, the software determined the areas at risk of flooding, and ultimately the flood risk map is specified. For example, the software was applied for a seasonal river in Shiraz, which sinks to the Maharlu Lake with satisfactory results. Afterward, the October 2011 flood event of Ayutthaya River in Thailand was investigated, where satellite images of the flood-affected areas were available. Investigation of the satellite image of this flood along with the survey of topographic maps of the river route indicated peak discharge of the flood was 4113.01 m3/s, which differed as 2.1 percent as compared to a record of 4200 m3/s (real measured peak flow). If the flood occurs with the current situation in the area, the flooded area decreased by 17.63% compared with the submerged area in 2011. Furthermore, simulation of the March 2019 Shiraz Flood by the model was in good agreement with the report of the Special Committee of 2019 Iran Floods.

Keywords

References

References (In Persian)

Fars Agricultural and Natural Resources Research and Education Center, Watershed Management, and Soil Conservation Department., (2017). Statistical report of the Khosh-rood River flow rate of Shiraz (personal communication). [In Persian]

Jamali, M., Moghimi, E., Jafarpour, Z., Kardovani, P., (2015), Spatial Analysis of Geomorphological Hazards of Urban Development in the Banks of Khoshk River in Shiraz, Iran, Journal of Spatial Analysis Environmental Hazards, Vol. 2, No. 3, pp. 51-61. [In Persian]

Lajavardi, M., Khaledi, Sh., Sattari, Sh., (2013), Zoning the flood bearing Moddaghchai watershed (Eastern Azerbaijan), Journal of Geography and Planning, Vol. 17, No. 44, pp. 237-255. [In Persian]

Lashkari, H., Rashidi, A., Rezayi, A., (2013), Flood zoning of Zarinerood river by using the HEC-RAS model in GIS area, Journal of Earth Science Researches, Vol. 3, No. 13, pp. 51-68. [In Persian]

Management and Planning Organization, (2005), Guideline of Flood Plain Zoning and Determination of Floodway and Flood Fringe. Publication No. 307 Ministry of Energy Iran Water Resources Management CO. Deputy of Research Office of Standard and Technical Criteria, 106p. [In Persian]

Refahi, H., (2015), Water erosion and conservation, Tehran University Press, 674p. [In Persian]

Servati, M.R., Ahmadi, M., Nosrati, K., Mazbani, M., (2013), Flood potential zoning of Sarab Watershed in Dareh Shahr, Geography, Vol. 11, No. 36, pp. 55-77. [In Persian]

Shadmani, M., Marofi. S., Mohammadi, K., Sabziparvar, A.A., (2011), Regional flood discharge modeling in Hamedan province using Artificial Neural Network, Journal of Water and Soil Conservation, Vol. 18, No 4, pp. 21-42. [In Persian]

Special Reporting Committee on Iran Floods, (2019), The 2019 Iran Floods Narrative. 105p. [In Persian]

Valizadeh-Kamran, Kh., (2007), GIS application for flood risk zoning (case study: Lighvan watershed river), Journal of Geographic Space. Vol. 7, No. 20, pp. 153-170. [In Persian]

Yamani, M., Davarzani, Z., Dadrasi, A., (2012), Evaluation of Fuzzy Logic Relative to other Conceptual Models in Zoning of Flooding with Emphasis on Geomorphological Aspects Case study: Davarzan Basin, Journal of Management System, Vol. 2, No. 5, pp.121-134. [In Persian]

References (In English)

Al-Weshah. R.A., El-Khoury, F., (1999), Flood analysis and mitigation for Petra area in Jordan, Journal of Water Resources Planning and Management, Vol. 3, pp.170-177.

Anderson, H.L., Chen, Z.Q., Kavvas, M.L., Feldman, A., (2002), Coupling HEC-HMS with atmospheric models for prediction of watershed runoff, ASCE Journal of Hydrologic Engineering, Vol. 7, No. 4, pp. 321-318.

Du, J., Qiana, L., Rui, H., Zuo, T., Zhenga, D., Xu, Y., Xu, CY., (2012), Assessing the effects of urbanization on annual runoff and flood events using an integrated hydrological modeling system for Qinhuai River basin, China. Journal of Hydrology, Vol. 464-465, pp. 127-139.

Fernandez, D.S., Lutz, M.A., (2010), Urban flood hazard zoning in Tucumán Province, Argentina, using GIS and multicriteria decision analysis. Engineering Geology, Vol. 111, No. 1, pp. 90-98.

Gale, E.L., Saunders, M., (2013), The 2011 Thailand flood: climate causes and return periods, Weather, Vol. 68, No. 9, pp. 233-237.

Hudson, P. Botzen, W. J. W. Kreibich, H. Bubeck, P. Aerts, J. C. J. H. (2014), Evaluating the effectiveness of Flood Damage Mitigation Measures by the Application of Propensity Score Matching, Natural Hazards, and Earth System Science, 14, 7, pp. 1731-1747.

Khattak, M. S. Anwar, F. Usman Saeed, T. Sharif, M. Sheraz, K. Ahmed, A. (2016), Floodplain Mapping Using HEC-RAS and ArcGIS: A Case Study of Kabul River, Research Article – Civil engineering, 40, pp. 1375-1390.

Perera, E. D. P. Hiroe, A. Shrestha, D. Fukami, K. Basnyat, D. B. Gautam, S. Hasegawa, A. Uenoyama, T. Tanaka, S., (2015), Community-based Flood Damage Assessment Approach for Lower West Rapti River basin in Nepal under the Impact of Climate Change, Natural Hazards, 75, pp. 669-699.

Rad, M., Vafakhah, M., Gholamalifard, M., (2018), Flood mapping using the HEC-RAS hydraulic model in part of Khorramabad watershed, Journal of Natural Environmental Hazards, Vol.07, Issue 16, pp. 211-226.

Silva, F. V. Bonuma, N. B. Uda, P. K. (2014), Flood Mapping In Urban Area Using Hec-Ras Model Supported By GIS, 6th International Conference on Flood Management, Sau Paulo, Brazil, pp. 1-9.

Suriya, S., Mudgal, B.V., (2012), Impact of urbanization on flooding: The Thirusoolam sub-watershed–A case study, Journal of Hydrology, Vol. 412-413, pp. 210-219.

Suwanwerakamtorn, R., (1994), GIS and hydrologic modeling for management of small watersheds, ITC Journal, Vol. 4, pp. 343-349.

Tripathi, R., Sengupta, S.K., Patra, A., Chang, H., Jung, I., (2014), Climate change, urban development, and community perception of an extreme flood: A case study of Vernonia, Oregon, USA. Applied Geography, Vol. 46, pp.137-146.