Drought Monitoring in Northern Nigeria Using Four (4) Indices.

International Journal for Research in Applied Sciences and Biotechnology

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Title Drought Monitoring in Northern Nigeria Using Four (4) Indices.
Creator OLASORE, Adeyemi Joshua
OLAGBAIYE, Adebayo Ebenezer
AJAYI, Taiwo Adedayo
ALABI, Peter Oluwatobi
Subject Analysis
Northern Nigeria
Description Drought can generally be defined as the extreme persistence of precipitation deficit over a region for a specific period. Eight study locations were picked from the Sudano-Sahelian agro-ecological zones of Nigeria (Bauchi, Bida. Kaduna, Kano, Maiduguri. Sokoto, Nguru, and Katsina) from 1981 to 2015. The Standardized Precipitation Index (SPI), Standardized Precipitation Evaporation Index- Thornthwaite (SPEI.T), Standardized Precipitation Evaporation Index-Hargreaves (SPEI-H) and Standardized Precipitation Evaporation Index-penman (SPEI-P) were used as the primary indicators of meteorological and agricultural droughts. The correlation coefficient shows an increasing correlation among the indices with increasing time scale, with SPI and SPEI-H having the highest correlation. The regression analysis shows a monotonic increasing relationship between indices while SPI vs SPEI-H has the highest correlation coefficient. The number of drought occurrences captured by the indices also increases with increasing time scale with SPEI-P detecting the highest number of drought events. All the drought indices reflect the historical drought periods between 1982-1989, 1992-2002, and 2008-2011. SPI, SPEI-P, and SPEI-H detected similar duration and intensity for the historical drought between 1982 and 1989 while SPEI-P showed the highest intensity and duration for the historical droughts between 1992 and 2002 and between 2008 and 2011.Analytic Hierarchy Process (AHP) evaluated that SPEI-P was more robust and sophisticated, SPI and SPEI-P had the same score for tractability while SPEI-H being the least tractable, and SPI had the highest for transparency and extendibility.
Publisher Vandana Publications
Date 2021-01-07
Type info:eu-repo/semantics/article
Peer-reviewed Article
Format application/pdf
Identifier https://www.ijrasb.com/ojs/index.php/ojs-ijrasb/article/view/243
Source International Journal for Research in Applied Sciences and Biotechnology; Vol. 8 No. 1 (2021): January Issue ; 13-31
Language eng
Relation https://www.ijrasb.com/ojs/index.php/ojs-ijrasb/article/view/243/200
Rights Copyright (c) 2021 International Journal for Research in Applied Sciences and Biotechnology

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