Open AccessFlood Vulnerability Assessment on Selected Communities in Ikwerre Local Government Area of Rivers State, Nigeria, Using Remote Sensing and GIS Techniques
Author(s) -
Wali Elekwachi,
Philip Ogbonnia Phil-Eze,
Collins H. Wizor,
Musa Garba Abdullahi,
Olubukola O. Afolabi,
Ihunda. C. Eze,
L. C. Bosco-Abiahu
Publication year - 2021
Publication title -
journal of geography, environment and earth science international
Language(s) - English
Resource type - Journals
ISSN - 2454-7352
DOI - 10.9734/jgeesi/2021/v25i930308
Subject(s) - hydrology (agriculture) , human settlement , flood myth , environmental science , digital elevation model , channel (broadcasting) , levee , flooding (psychology) , surface water , water resource management , geography , remote sensing , geology , cartography , environmental engineering , psychotherapist , psychology , geotechnical engineering , archaeology , engineering , electrical engineering
A flood is an overflow of water that submerges land that is usually dry. Flooding may occur as an overflow of water from water bodies, such as river, lake or ocean, in which the water overtops or breaks levees, resulting in some of that water escaping its usual boundaries, or it may occur due to an accumulation of rain water on saturated ground in an area. To find out the most vulnerable communities, the Digital Elevation Model (DEM) and location data of selected communities were used. The Image Re-class and Map Overlay were performed on QGIS software to identify communities that are most affected. The result shows that the region has no river channel that discharge excess water easily. It also shows that four, out of twelve settlements were located at the high risk zone. The settlements are Uniport, Omuoda, Omuahunwo and Okparagwa. It was recommended that the high risk zone in the area should be provided with artificial water channel that will contain and convey surface sun-off to a nearby stream. The local authority should relocate the affected settlements to a safer zone.