Spatial and temporal drought analysis in the north central region of Nigeria
| Autor: | T.C. Okeke, O. G. Okeola |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Hydrology
010504 meteorology & atmospheric sciences North central 0211 other engineering and technologies 02 engineering and technology 01 natural sciences Geography Drought risk Initial distribution Drought Risk Standardized Precipitation Index (SPI) Metrological Drought Time Scale Long period 021108 energy Precipitation index 0105 earth and related environmental sciences |
| Zdroj: | Journal of Applied Sciences and Environmental Management; Vol 23, No 4 (2019); 763-767 |
| ISSN: | 1119-8362 |
| Popis: | This study examined the occurrence of drought in north central Nigeria. Problems related to drought includes: unpredictable commencement and end time of rainfall season, seasonal rainfall fluctuations, long period of no rainfall. Monthly rainfall data was obtained from the Nigeria Metrological Agency (NIMET) Lagos. This covers up to 51 years for seven different metrological stations namely: Lafia, Ilorin, Markurdi, Jos, Lokoja, and Minna and Abuja. Standardized Precipitation Index (SPI) was adopted for this study. SPI approach requires a transformation to the initial distribution of rainfall to achieve a normalized distribution. Drought analysis indicates 1980s as the decade with worst drought effect as drought incidences were observed in Jos, Minna, Ilorin and Markurdi stations and 1983 as the only year in which drought occurred simultaneously across four different stations. Keywords: Drought Risk, Standardized Precipitation Index (SPI), Metrological Drought, Time Scale |
| Databáze: | OpenAIRE |
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