Flood remains one of the most common natural disasters. Its rate of occurrence and the associated destructive tendency are on a rising scale across the globe. Flood risk may increase due to human activities. It could also decrease by appropriate flood management and planning. However, this requires upgraded and newly generated reliable and up to date floodplain and flood vulnerability maps. Hence, this study analysed the Niger-Benue river flood risk and vulnerability of 256 communities in Kogi State. The aim is to generate reliable up to date flood vulnerability maps that categorises the communities into different vulnerability zones and identify likely locations for erecting flood shelter/refugee camps during flood events in the State. Shuttle Radar Topography Mission (STRM) Digital Elevation Datasets, the spatial location of 256 communities, shapefiles of Kogi State’s administrative boundaries and Niger-Benue river basin were among the datasets acquired for the study. The Digital Elevation Model (DEM) of the study area was created to depict topography and the heights of each component of the terrain. Also, a 3km buffer distance was created around the Niger-Benue river and four vulnerability zones were defined based on the terrain and proximity components of each community. Furthermore, choropleth maps were generated for each vulnerability zone based on the number of communities per Local Government Area (LGA). Findings of this study revealed that out of the 256 sampled communities, 161 representing 62.89% are exposed to varying degrees of vulnerability due to Niger-Benue flooding. Out of these, 33 (12.89%) are highly vulnerable, whereas each of the vulnerable (64) and marginally vulnerable (64) communities accounted for 25%. The rest 37.11% constituted the not vulnerable communities (95). Out of the highly vulnerable communities, 27.27% accounted for those located on river banks and 72.73% for those located within a 3km distance from the river. The majority of the riverbank communities were found in Kogi, Lokoja and Ajaokuta LGAs. Igalamela Odolu, Kogi, Ofu and Bassa were among the LGAs with a high number of vulnerable communities. The not vulnerable communities were mostly located around the Agbaja Plateau and Okoro-Agbo hills in Ijumu, Kabba/Bunu and Yaba East LGAs. It was concluded that the 9 communities (Ajaokuta, Eroko, Iche, Jamata, Numai, Okume, Agodo, Denbor and Gunji Twaki) located on river banks are exposed to the highest level of flood risk and invariably, the devastating impact of flood in Kogi State. Most communities in Ijumu, Kabba/Bunu and Yaba West LGAs are less likely to be affected by Niger-Benue River flooding. It is therefore recommended that communities within the highly vulnerable zones, beginning with the 9 located on river banks should be relocated to higher terrains. Also, future settlement development should be discouraged in the zone by the collaborative efforts of the State and LGA authorities. Further studies should be conducted around Ijumu LGA in view of identifying the most suitable locations for possible flood shelter/refugee camp development in the study area.
S. D. Brody, S. Zahran, W. E. Highfield, H. Grover, and A. Vedlitz “Identifying the impact of the built environment on flood damage in Texas”, Oxford, Blackwell Publishing, 2007.
D. Schramn and R. Dries “Natural hazard; causes and effects”, U.S.A, University of Wisconson, 1986.
A. C. C. Ezeabasili, and A. U. Okonkwo, “Climate change impacts on the built environment in Nigeria”, African Research Review, vol. 7(4), pp. 288-303, 2013.
D. N. Jeb, and S. P. Aggarwal, “Flood inundation hazard modeling of the River Kaduna using remote sensing and geographic information systems”, Journal of Applied Sciences Research, vol. 4 (12), pp 1822 -1833.
European Commission (EC), “Directive 2007/60/EC of the European Parliament and of the Council of 23 October, 2007 on the assessment and management of flood risks”, Official Journal of the European Union, L288, pp 27-34. 2007.
N. O. Adeoye, A. Ayanlade, and O. Babatimehin, “Climate change and menace of floods in Nigerian cities: socio-economic implications”, Advances in Natural and Applied Sciences, vol. 3 (3), pp 369-377, 2009.
M. Nmeribeh, “Kano’s flood disaster”, The NEWS. 2011.
S. Balabanova, V. Vassilev, “Creation of flood hazard maps”, BALWOIS 2008-Ohrid, Republic of Macedonia, 25, 2008.
Y. Kwak, and A. Kondoh, “A study on the extraction of multi-factor influencing floods from RS image and IS data; a case study in Nackdong Basin, S.Korea”, The International Archives Of The Photogrammetry, Remote Sensing And Spatial Information Sciences, ISPRS Congress Beijing 2008, 37, Part B8, Commission VIII, pp. 421-426.
A. J. Askew, “Water in the International Decade for Natural Disaster Reduction. In Leavesley et al., (eds) Destructive Water: Water-caused Natural Disasters, their Abatement and Control. IAHS. Publication No. 239. 1999.
Simonovic, P. Slobdan, “A new method for spatial and temporal analysis of risk in water resources management”, Journal of Hydro informatics, vol. 11(3,4), pp. 320-329, 2009.
C. Ezigbo, “Losses from 2012 flood hits N2.1Trillion, ThisDay Live”, Available online http://www.thisdaylive.com/articles/nema-losses-from-2012-flood-hits-n2-1trillion/159522/.
Centre for Human Security of the Olusegun Obasanjo Presidential Library Foundation (CHSOOPLF), Building a Coordinated Approach to Flood Disasters in Nigeria, (2013) Available online: http://centreforhumansecurity.org/, http://www.nema.gov.ng/, http://anewnaija.org/.
O. H. Adedeji, B. O. Odufuwa, and O. H. Adebayo, “Building capabilities for flood and hazard preparedness and risk reduction in Nigeria: need for spatial planning and land management”, Journal of sustainable Development in Africa, vol. 14 (1), 45-58, 2013.
Ikusemoran Mayomi, Anthony Dami and U. M. Maryah, “GIS Based Assessment of Flood Risk and Vulnerability of Communities in the Benue Floodplains, Adamawa State, Nigeria”. Journal of Geography and Geology; Vol. 5, No. 4; 2013 ISSN 1916-9779 E-ISSN 1916-9787, Published by Canadian Center of Science and Education.
M. Aderoju Olaide, Jantiku Jagila, A. Fagbemiro Olayinka, Aliyu Imrana, K. Nwadike Blessing, E. Ajonye Susan, S. Salman Khalid, IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT) e-ISSN: 2319-2402, p-ISSN: 2319-2399. Vol. 8, Issue 2 Ver. IV (PP 74-84), 2014. www.iosrjournals.org.
NASA-National Aeronautics and Space Administration, “Flood in Nigeria, 2012”, http://earthobservatory.nasa.gov/IOT/view.php?id=79404.
S. Ishaya, O. O. Ifatimehin and I. B. Abaje, “Mapping Flood Vulnerable Areas in a Developing Urban Centre of Nige ria,” Journal of Sustainable Development in Africa, Vol. 11, No. 4, pp. 180-194.2009.
O. O. Ifatimehin, S. D. Musa, & J. O. Adeyemi, “An Analysis of the Changing Land use and its Impact of the Environment of Kogi State”, Journal of Sustainable Development in Africa, Vol. 10(4), 357-364. 2009.
A. A. Musilimu, I. A. Tolu and O. I. Ismaila, “Assessment of Solid Waste Management in Kogi State”. Jordan Journal of Earth and Environmental Sciences; Vol. 7 (2), pp. 103-108, Dec 2015, ISSN 1995-6681.
M. L. Ojigi, F.I. Abdulkadir, M. O. Aderoju, “Geospatial Mapping and Analysis of the 2012 flooding Disaster in central parts of Nigeria” 8th GIS symposium, Dammaram, Saudi Arabia, 2013.
A. Emmanuel Udo, O. C. Ojinnaka, C. N. Baywood, U. A Gift, “Flood Hazard Analysis and Damage Assessment of 2012 Flood in Anambra State Using GIS and Remote Sensing Approach” American Journal of Geographic Information System, vol. 4(1): 38-51, 2015. DOI: 10.5923/j.ajgis.20150401.03.
Felix Ndidi Nkeki, Philip John Henah, Vincent Nduka Ojeh, “Geospatial Techniques for the Assessment and Analysis of Flood Risk along the Niger-Benue Basin in Nigeria” Journal of Geographic Information System, vol. 5, pp. 123-135, 2013, http://dx.doi.org/10.4236/jgis.2013.52013 Published Online April 2013 (http://www.scirp.org/journal/jgis).
G. O. Enaruvbe, and G. U. Yesuf, “Spatial analysis of flood disaster in Delta State, Nigeria”, IFE Res. Public. Geography, vol. 11, pp. 52-58. 2012.
F. N. Nkeki, P. J. Henah, and V. N. Ojeh, “Geospatial Techniques for the Assessment and Analysis of Flood Risk along the Niger-Benue Basin in Nigeria”, Journal of Geographic Information System, vol. 5, pp. 123-135, 2013. http://dx.doi.org/10.4236/jgis.2013.52013.
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