Flood Inundation Mapping of Lagos Island Local Government Area of Lagos State

Adewara, M.B. and Odeyemi, K. A. (2019) Flood Inundation Mapping of Lagos Island Local Government Area of Lagos State. International Journal of Environmental Design & Construction Management, 10 (4286). pp. 286-301. ISSN 1933-5948

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Abstract

Lagos Island is characterized by flooding on a yearly basis. This flooding leads to loss and damage of millions of properties. One of the most extreme flooding that occurred in this location was in July 2012 and July 2017, causing serious damage to both public and private properties. Hence this present study applied the HEC (Hydrological Engineering Centre) modelling packages such as HEC-HMS and HEC-RAS software packages as well as ARCGIS software to simulate flood occurrence in Lagos Island using LIDAR data, rainfall data, land use maps and GPS points as input data. Findings in this study showed that the average flow depths within the study area is 3.2m and over 60% of the Residential and Commercial buildings are at risk. The areas within the city with high risk of flooding were identified from the flood hazard maps that were generated. Three-dimensional model of the location with embedded flood inundation map is also generated for a better understanding of the severity of flooding in the location.

Item Type:	Article
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) G Geography. Anthropology. Recreation > GB Physical geography G Geography. Anthropology. Recreation > GC Oceanography G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions:	Faculty of Engineering, Science and Mathematics > School of Geography
Depositing User:	Mr Daniel Kumoye
Date Deposited:	09 Jun 2020 16:33
Last Modified:	09 Jun 2020 16:33
URI:	http://eprints.federalpolyilaro.edu.ng/id/eprint/428

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