Flood Hazard Spatialization Applied to The City of Batna: A Methodological Approach

Authors

  • N. Harkat Department of Architecture, Institute of Architecture and Earth Sciences, Ferhat Abbas University Setif 1, Algeria
  • S. Chaouche Urbanism and Environment Laboratory, Faculty of Architecture & Urbanism, University Salah Boubnider Constantine 3, Algeria
  • M. Bencherif Urbanism and Environment Laboratory, Faculty of Architecture & Urbanism, University Salah Boubnider Constantine 3, Algeria

Abstract

Flood flows can cause destruction to properties and infrastructure or even cost human lives. Batna is an Algerian city that is highly exposed to the risk of flooding, with an average of one flood every three to four years. The current methods utilized to analyze flood hazards are limited to the hydrology of the watershed. Limiting the analysis of flood hazards could mislead the decision-makers from proper management of such risks. The objective of the current study is to propose a simplified flood hazard model called HEC RAS-DTM (Hydrologic Engineering Centers River Analysis System (HEC RAS)-Digital Terrain Model (DTM)) and to evaluate it utilizing data gathered from the hydrological context and the hydraulic modeling of Batna city. The model entails two distinct phases. Initially, it attempts to use descriptive statistical methods based mainly on frequency analysis, which consists of studying flood flows in order to determine the probability of future flood occurrence. The analysis of the hydrological context of the city of Batna has revealed that peak flows from stream floods have been predicted at various return periods. Subsequently, HEC RAS was deployed to produce hydraulic modeling in order to extract the water heights and speeds corresponding to these expected flows. These data, along with DTM, are crucial for the spatialization of flood hazards. The hydraulic modeling and simulation using HEC-RAS and Geographic Information System (ArcGIS) of water flow at the two main valleys, Oued Batna and Oued El Gourzi, allowed predicting the extent of flooding that could occupy a large part of the city. The mapping of the flood hazard revealed the sectors that would be most exposed. The results obtained from the suggested model confirm that a significant portion of the city of Batna remains vulnerable to floods in relevance with the predicted flood return periods. The suggested model has indicated significant growth in flood locality. Additionally, the model was proved to be efficient for the analysis of flood flows, and it could easily substitute conventional analysis methods. Further studies or investigations are advised in order to replicate the study in different contexts. The article entails suggestions for properly managing flood risks. Future studies on flood risk alleviation in Batna city could be likewise considered.

Keywords:

HEC, RAS, DTM, flood, flood hazard, spatialization, Batna

Downloads

Download data is not yet available.

References

A. Ali, G. A. Pasha, U. Ghani, A. Ahmed, F. M. Abbas, “Investigating role of vegetation in protection of houses during floods”, Civil Engineering Journal, Vol. 5, No. 12, pp. 2598-2613, 2019 DOI: https://doi.org/10.28991/cej-2019-03091436

G. Sami, D. Hadda, K. Mahdi, “Flood hazard map in the city of Batna (Algeria) by hydraulic modeling approch”, Annals of the University of Oradea, Vol. 26, No. 1, pp. 86-93, 2016

K. H. Machekposhti, H. Sedghi, A. Telvari, H. Babazadeh, “Flood analysis in Karkheh river basin using stochastic model”, Civil Engineering Journal, Vol. 3, No. 9, pp. 794-808, 2017 DOI: https://doi.org/10.21859/cej-030915

O. A. Agbede, O. O. Aiyelokun, “Establishment of a stochastic model for sustainable economic flood management in Yewa Sub-Basin, southwest Nigeria”, Civil Engineering Journal, Vol. 2, No. 12, pp. 646-655, 2016 DOI: https://doi.org/10.28991/cej-2016-00000065

M. N. Sharabian, M. Taheriyoun, M. Karakouzian, “Sensitivity analysis of the DEM resolution and effective parameters of runoff yield in the SWAT model: A case study”, Journal of Water Supply: Research and Technology, Vol. 69, No. 1, pp. 39-54, 2019 DOI: https://doi.org/10.2166/aqua.2019.044

T. L. Dammalage, N. T. Jayasinghe, “Land-use change and its impact on urban flooding: A case study on Colombo district flood on May 2016”, Engineering, Technology & Applied Science Research, Vol. 9, No. 2, pp. 3887-3891, 2019 DOI: https://doi.org/10.48084/etasr.2578

D. Boutoutaou, H. Zeggane, “Method of calculating of floods the wadis of Algeria”, LJEE, No. 24-25, pp. 62-75, 2014 (in French)

National Agency for Hydraulic Resources, available at: http://www.anrh.dz/

The National Institute of Cartography and Remote Sensing, available at: http://www.inct.mdn.dz/site%20anglais/web_inct_sim/about.php

National Bureau of Studies for Rural Development, available at: http://bneder.dz/

Hydraulics Management, Batna City, Algeria, 2004

D. H. Koumassi, A. E. Tchibozo, C. Houssou, “Frequentiel analyse of extreme hydropluviometric events in the Sota basin of Benin”, Africa Science, Vol. 10, No. 2, pp. 137-148, 2014

S. Bennis, Hydraulique et hydrologie, 2nd Edition, PU Quebec, 2007 (in French)

A. Chachoua, Gestion de crue dans un bassin versant: Etude hydrologique, hydraulique et amenagement, MSc Thesis, University of Tlemcen, 2009 (in French)

Downloads

How to Cite

[1]
N. Harkat, S. Chaouche, and M. Bencherif, “Flood Hazard Spatialization Applied to The City of Batna: A Methodological Approach”, Eng. Technol. Appl. Sci. Res., vol. 10, no. 3, pp. 5748–5758, Jun. 2020.

Metrics

Abstract Views: 660
PDF Downloads: 529

Metrics Information

Most read articles by the same author(s)