Drought Monitoring in Northern Nigeria Using Four (4) Indices.
International Journal for Research in Applied Sciences and Biotechnology
View Publication Info| Field | Value | |
| Title |
Drought Monitoring in Northern Nigeria Using Four (4) Indices.
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| Creator |
OLASORE, Adeyemi Joshua
OLAGBAIYE, Adebayo Ebenezer AJAYI, Taiwo Adedayo ALABI, Peter Oluwatobi |
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| Subject |
Analysis
Drought Trend Northern Nigeria |
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| 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.
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| Publisher |
Vandana Publications
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| Date |
2021-01-07
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| Type |
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
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| Format |
application/pdf
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| Identifier |
https://www.ijrasb.com/ojs/index.php/ojs-ijrasb/article/view/243
10.31033/ijrasb.8.1.3 |
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| Source |
International Journal for Research in Applied Sciences and Biotechnology; Vol. 8 No. 1 (2021): January Issue ; 13-31
2349-8889 |
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| Language |
eng
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| Relation |
https://www.ijrasb.com/ojs/index.php/ojs-ijrasb/article/view/243/200
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| Rights |
Copyright (c) 2021 International Journal for Research in Applied Sciences and Biotechnology
https://creativecommons.org/licenses/by-nc-nd/4.0 |
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