Spatial Assessment of Flood Vulnerability in Anambra East Local Government Area, Nigeria Using GIS and Remote Sensing
Okwu-Delunzu Virginia Ugoyibo *
Department of Geography and Meteorology, Enugu State University of Science and Technology, Enugu, Nigeria
Ogbonna Chidi Enyinnaya
Department of Environmental Resource Management, Abia State University, Uturu, Nigeria
Lamidi Souleman
Department of Geoinformatics, University of Nigeria, Nsukka, Nigeria
*Author to whom correspondence should be addressed.
Abstract
This study aimed at spatial assessment of flood vulnerability in Anambra East and environs. In carrying out this work, Remote Sensing (RS) and Geographic Information System (GIS) were employed. Data from Google image and Shuttle Radar Topography Mission (SRTM) of 2012 was used. ArcGIS 10.1 and other GIS softwares were employed in image processing. The procedure consists of mapping of flood prone area and modeling of digital elevation. Analysis of land use and land cover indicated that agricultural land used or farmland was highest (41.7%), followed by forest 27.26% and built up area 22.75%. Flood vulnerability assessment showed that 71% of the study area was liable to flooding. This calls for immediate interventions and initiatives to discourage inhabitants from occupying the flood prone areas, relocate and avoid liable areas particularly river banks. In this regard land use planning should be followed appropriately and where necessary.
Keywords: Flood, GIS, vulnerability, topography, land use planning