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A Geospatial Expose of Flood-Risk and Vulnerable Areas in Nigeria

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  • Chukwudi Gbadebo Njoku

    (University of Calabar, Nigeria)

  • Joel Efiong

    (University of Calabar, Nigeria)

  • Nse-Abasi Ndiyo Ayara

    (University of Calabar, Nigeria)

Abstract

Flooding is recurrent in Nigeria, occurring yearly at different scales. This geared the need for a study to reveal local government areas (LGAs) that are at risk and vulnerable to flooding. The multi-criteria approach was adopted, using geospatial techniques and data. Factors considered were elevation, slope, rainfall intensity, and distance to river. The factors were classified, reclassified, rated, and weighed in a systematic process. Nineteen states and 114 LGAs face high risks, especially communities in the Niger Delta, around the lagoons of Lagos, along River Niger, Benue, and the Cross-River. Also, 125 LGAs in 18 states face medium flood-risk vulnerability. Consideration the population density of communities, Lagos State is the most vulnerable because of LGAs with high population densities within high flood-risk zones. Other states with communities exposed to high flood-risk vulnerability include Rivers, Kogi, Cross River, Akwa Ibom, Anambra, and Delta. The study provides information key to proactive policy formulation, mitigation, and adaptation to flood risk in Nigeria.

Suggested Citation

  • Chukwudi Gbadebo Njoku & Joel Efiong & Nse-Abasi Ndiyo Ayara, 2020. "A Geospatial Expose of Flood-Risk and Vulnerable Areas in Nigeria," International Journal of Applied Geospatial Research (IJAGR), IGI Global, vol. 11(3), pages 87-110, July.
    • Handle: RePEc:igg:jagr00:v:11:y:2020:i:3:p:87-110
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