URBAN FLOOD VULNERABILITY MAPPING OF LAGOS, NIGERIA
DOI:
https://doi.org/10.20319/mijst.2017.s31.224236Keywords:
Flood, Mapping, GIS, Flood VulnerabilityAbstract
The paper aimed to demonstrate how the application of HEC-RAS and GIS techniques can be utilized for better results when carrying out a flood vulnerability mapping and assessment. Digital interpretation that uses HEC-RAS and GIS to conduct hydraulic modelling, flood inundation mapping and visualization were adapted. Similarly, Digital Terrain Model (DTM) and aerial imagery of lansat8 OLI of the study area were used. The data were analysed with the aid of ArcGIS 10.1 application with HEC-GeoRAS tool extension and HEC-RAS 4.1 software application. The results showed: 1) the flood vulnerability map of Lagos (Figure 4) generated using the combination GIS techniques and RAS packages. The flood risk depicted shown areas that have 1 % probability of flood occurrence in 100 years; 2) The topography of Lagos (Figure 5) indicated the pattern of the city terrain to be relatively flat in the centre and it also has few meters high above sea level especially in the south-eastern areas; 3) of the 20 local government areas Lagos state (Figure 6) only two (Agege and Ifako) were found not to be at risk of flooding. We concluded that flood vulnerability of this kind is important for Nigeria and other countries to aid decision on flood disaster planning.
References
Aderogba, Kofo (2012) ‘Climate change and sustainable growth and development in Lagos Metropolis, Nigeria’ International J. Soc. Sci. & Educati, Vol. 2 Issue 4, Retrieved from: http://ijsse.com/sites/default/files/issues/2012/Volume%202%20Issue%204,%202012/paper%2012/Paper-12.pdf
Atkinson S.F., Canter L.W., & Mangham W. M. (2008) multiple uses of geographic information systems (GIS) in cumulative effects assessment (CEA)
Alaghmand, S., Abdullah, R., Abustan, I. & Vosoogh, B. (2010) ‘GIS-based River Flood Hazard Mapping in Urban Area (A Case Study in Kayu Ara River Basin, Malaysia)’ International Journal of Engineering and Technology, 2 (6) PP. 488-500 Retrieved from: http://www.enggjournals.com/ijet/docs/IJET10-02-06-23.pdf
Alexander, M., Viavattene, C., Faulkner H., & Priest, S. (2011) A GIS-based flood risk assessment tool: supporting flood incident management at the local scale. Flood Hazard Research Centre, Middlesex University. Retrieved from: http://web.sbe.hw.ac.uk/frmrc/downloads/reports/Urban%20Flooding/A%20GIS-based%20Flood%20Risk%20Assessment%20Tool_Supporting%20Flood%20Incident%20Management%20at%20the%20local%20scale.pdf
Cinque, P., Crowe, P., and Davies, K. (2003) The role of spatial information and GIS in the management of flood emergencies. Available at: http://www.ses.nsw.gov.au/content/documents/pdf/research-papers/42916/The_role_of_spatial_information_and_GIS_in_the_management_of_flood_emergencies.pdf
Datu, Kerwin (2014) ‘A Flood-Free Lagos: The Regional Imperative’ Retrieved from: https://ng.boell.org/2014/07/29/flood-free-lagos-regional-imperative
ESRI (2013) Understanding our world. Retrieved from: http://search.esri.com/results/index.cfm?do=esri&q=flood&start=0
Fagherazzi, S. and Du, X. (2008) ‘Tsunamigenic incisions produced by the December 2004 earthquake along the coasts of Thailand, Indonesia and Sri Lanka’, Geomorphology, 99 (1–4). Science Direct. Retrieved from: http://www.sciencedirect.com/science/article/pii/S0169555X07004886 (Accessed: 15 July 2010). ESRI (2013) Understanding our world. Available at: http://search.esri.com/results/index.cfm?do=esri&q=flood&start=0
IRIN (2012): ‘Synopsis of flood damage’ Retrieved from: http://www.irinnews.org/news/2009/09/11-0
Kaoje, I. U. (2016) ‘Application of Geographical Information System Techniques in Urban Flood Risk Assessment and Vulnerability Mapping. A Case Study of Cardiff, Wales’ International Journal of Scientific and Research Publications Volume 6, Issue 6 ISSN 2250-3153. Retrieved from: http://www.ijsrp.org/research-paper-0616/ijsrp-p5420.pdf
Leister, P. (2009). Flooding in Wales Retrieved from: http://www.environment-agency.gov.uk/static/documents/Research/ENV0005_Flooding_in_Wales_ENGLISH_AW_LR(1).pdf
National Academy of Sciences (2007) ‘Elevation Data for Floodplain Mapping’, The National Academies Press. Retrieved from: https://www.nap.edu/catalog/11829/elevation-data-for-floodplain-mapping
National Archive (2013) ‘Flood Risk Mapping’. Retrieved from: http://webarchive.nationalarchives.gov.uk/20130123162956
NPC(2010). Federal Republic of Nigeria:2006 Population and Housing Census. Retrieved fromhttp://www.population.gov.ng/index.php/publications/140-population-distribution-by-sex-state-lgas-and-senatorial-district-2006-census-priority-tables-vol-3
Sanyal, J. and Lu, X. (2004) ‘Application of Remote Sensing in Flood Management with Special Reference to Monsoon Asia: A Review’ Natural Hazards, 33 PP. 283–301, Kluwer
Schubert, E. and Sanders, F. (2012) ‘Building treatments for urban flood inundation models and implications for predictive skill and modeling efficiency’, Advances in Water Resources, 41 PP. 49-64. Science Direct. Retrieved from: http://www.sciencedirect.com/science/article/pii/S0309170812000425
Soladoye, O. and Ajibade, L.T. (2014) ‘A Groundwater Quality Study of Lagos State, Nigeria’ International Journal of Applied Science and Technology l.4 (4) Retrieved from: http://www.ijastnet.com/journals/Vol_4_No_4_July_2014/32.pdf
Downloads
Published
How to Cite
Issue
Section
License
Copyright of Published Articles
Author(s) retain the article copyright and publishing rights without any restrictions.
All published work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
