TITLE:
Mapping of Flood Prone Areas in Surulere, Lagos, Nigeria: A GIS Approach
AUTHORS:
Chidinma Blessing Okoye, Vincent Nduka Ojeh
KEYWORDS:
GIS, Flooding, Surulere, DEM
JOURNAL NAME:
Journal of Geographic Information System,
Vol.7 No.2,
April
15,
2015
ABSTRACT: Increase in the frequency
of flooding incidents all over the world and indeed in Nigeria is a major cause
for concern. The purpose of this research work is to identify the factors that lead
to flooding; and using Geographic Information Systems, map the flood prone
areas in Surulere. The causal factors of flooding in Surulere, such as high
rainfall intensity and duration, land use patterns, human actions,
urbanization, soil impermeability to mention but a few were identified. The
pattern of rainfall in Surulere was analysed using 20 years rainfall data from
The Nigerian Meteorological Agency. The land use/land cover map as well as the
DEM of Surulere was generated in the ArcGis environment with ikonos imagery and
1:50,000 toposheet of Lagos S.E which covers Surulere. The Flood prone areas in
Surulere were then mapped. Results show that majority of the land area of
Surulere is prone to flooding. Flood mitigation such as early warning systems
and flood forecasting, proper urban development, awareness and research should
be implemented by the Lagos State Government.