An Investigation into the Flood Flow Pattern along University of Lagos Road Akoka, Yaba, Lagos State, Nigeria

Adewara, Monsur Babalola and Moshood, Ahmed Ishola (2019) An Investigation into the Flood Flow Pattern along University of Lagos Road Akoka, Yaba, Lagos State, Nigeria. In: The Environmental Design & Management International Conference (EDMIC 2019), 20-22 May, 2019, Faculty of Environmental Design & Technology, Obafemi Awolowo University, Ife University of West England, Bristol, United Kingdom..

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Abstract

Climate is fast changing and has brought about increase in the amount of rainfall in recent years. This increasing rainfall has been a major contributing factor to flood in most areas. The most common cause of flooding is prolonged rainfall aggravated by poor drainage system which could make rainwater not to be properly channeled into drains thereby leading to floods along the busy roads. This work aimed at assessing the causes of flood in the study area using Autodesk’s AutoCAD civil 3D and GIS and ways to minimize its vulnerability of the area to floods. The drain architectural system, water discharge from adjoining roads, longitudinal and cross sectional profile along the road were under studied to predict the vulnerability of the road to flood. The longitudinal and cross sectional profile of the road that were prepared in Autodesk’s AutoCAD Civil 3D was used to depict the configuration of the road surface. Flow direction, flow accumulation and flow length were determined using ESRI’s ArcMap 10.2. The flow direction maps were used to help model how surface runoff contributes to flooding. Flow accumulation was used to generate a drainage network, based on the direction of flow of each cell. Findings showed that the study area is characterized by stagnation of rainfall waters on the road. Results showed that the stagnation of rain water led to the flooding and this is attributable to; lack of water outlets along the road to discharge excess rainwater into the drain; no significant difference between the height level of the top of the road and the drain at some points along the road; deposit of refuse in the drain. The study has shown the need for flood flow analysis in flood management and has demonstrated the importance of GIS as a spatial tool for road flood inundation.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	T Technology > TD Environmental technology. Sanitary engineering T Technology > TH Building construction
Divisions:	Faculty of Engineering, Science and Mathematics > School of Geography
Depositing User:	Mr Daniel Kumoye
Date Deposited:	14 Jun 2020 16:09
Last Modified:	14 Jun 2020 16:09
URI:	http://eprints.federalpolyilaro.edu.ng/id/eprint/539

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