MAPPING OF FLOOD PRONE AREAS IN IMO STATE, SOUTHEASTERN NIGERIA USING GIS TECHNIQUES by Okore O.Okorafor, Maxwell I. Chikwue, Nnaemeka R. Nwakuba, Favour A. Nwaobi, Scientific Research Journal (Scirj), Volume IX, Issue VII, July 2021 Edition

Scirj Volume IX, Issue VII, July 2021 Edition
ISSN: 2201-2796

MAPPING OF FLOOD PRONE AREAS IN IMO STATE, SOUTHEASTERN NIGERIA USING GIS TECHNIQUES

Okore O.Okorafor, Maxwell I. Chikwue, Nnaemeka R. Nwakuba, Favour A. Nwaobi

Abstract: Flooding is a natural environmental hazard which has on a global scale caused irreparable losses on lives and property as well as deformation of the environment resulting in soil-nutrient loss, pollution of rivers/waterways, sedimentation of reservoirs and other negative issues in southeastern Nigeria. This study therefore makes use of GIS techniques to map areas in Imo State that are most prone or exposed to flooding. Satellite imagery and SRTM data were analyzed using ESRI ArcGIS 10.2 and Global Mapper v15 to generate maps for digital elevation model (DEM), digitized contour, 3D relief and flood vulnerability assessment. On analyzing the maps generated Oguta and Ohajiegbema were mapped as the most prone areas while Okigwe, Ideato North, Ideato South and Nkwerre were mapped the least prone. Nonetheless over 60% of the study area is still open to flood events if requisite environmental protective actions are not considered and implemented. On observing that the chief cause of flooding in the study area is heavy/prolonged rainfall/downpour with poor drainage channels, flood monitoring and assessment with proper design/construction of drainage networks/channels were among recommendations made to manage flood incidents in the study area.

Reference this Paper: MAPPING OF FLOOD PRONE AREAS IN IMO STATE, SOUTHEASTERN NIGERIA USING GIS TECHNIQUES by Okore O.Okorafor, Maxwell I. Chikwue, Nnaemeka R. Nwakuba, Favour A. Nwaobi published at: "Scientific Research Journal (Scirj), Volume IX, Issue VII, July 2021 Edition, Page 1-9 ".

Search Terms: flood, prone, flooding, mapping, GIS, drainage, DEM

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