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Analysis of the 2012 Flooding Events Downstream of Shiroro Reservoir, A Case of Gurmana Niger State, Nigeria

  • Rukayyah Abubakar Bahago
  • Aishetu Abdulkadir
  • Halilu Ahmed Shaba
  • Abubakar Alhassan
Conference paper
Part of the Southern Space Studies book series (SOSPST)

Abstract

The study aims at geospatial analysis of the 2012 Flood event, downstream of Shiroro Reservoir at Gurmana in Niger State, Nigeria as an input to contingency planning and emergency management. The objectives are to delineate and map the actual flood extent of the 2012 flood, produce flood vulnerability map and determine the impacts of the flood on the life and property of the residents of the study area. The 2012 flood brought untold hardship to many communities affected in Nigeria, including the study area. The flood affected about 77,05,378 people, damaged/destroyed about 618,000 houses and led to the death of 363 people. Tens of thousands of people were still in temporary shelters. A combination of satellite imageries, SRTM and DTM were used to establish flood extent. For the spatial extent analysis and disaster risk areas, buffer analyses, query of number of houses affected and their proximity to the river channel, classification of terrain elevation into categories of 0–100 m, 101–200 m and 201-above was carried out. The results indicated that about 20.368 km2 of lands were flooded. Farmlands and transportation routes were severely affected with about 50 members of the households in the study area being displaced. The vulnerability analysis indicated that the areas between 0 and 100 m are highly vulnerable and between 101 and 200 m are less vulnerable. This shows that if no measures are taken to prevent the population from buildings on the vulnerable floodplains, the next flood could be a major disaster to Gurmana. On this note, I strongly recommend that the people of Gurmana should be relocated. The field observation indicates that the occurrence of flood in the study area was due to the heavy rain, which coincided with water released from the dam, leading the backwash to the village since the flow into the mains were impeded. Hence a comprehensive geospatial analysis and mapping for emergency management, disaster management and flood contingency planning in the region is inevitable.

Keywords

Flood Geospatial GIS Disaster 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Rukayyah Abubakar Bahago
    • 1
  • Aishetu Abdulkadir
    • 2
  • Halilu Ahmed Shaba
    • 3
  • Abubakar Alhassan
    • 1
  1. 1.AARSE MemberMuizenburgRepublic of South Africa
  2. 2.Department of GeographyFederal University of TechnologyMinnaNigeria
  3. 3.Strategic Space ApplicationsNational Space Research and Development Agency (NASRDA)AbujaNigeria

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