Variations in the sequences of daily rainfall across Nigeria
| العنوان: | Variations in the sequences of daily rainfall across Nigeria |
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| المؤلفون: | Michael Chukwuma Obeta, Christopher Uche Ezeh, Raymond N. C. Anyadike |
| المصدر: | Arabian Journal of Geosciences. 9 |
| بيانات النشر: | Springer Science and Business Media LLC, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Wet season, Hydrology, Geography, 010504 meteorology & atmospheric sciences, General Earth and Planetary Sciences, Dry spell, Northern nigeria, 010501 environmental sciences, 01 natural sciences, 0105 earth and related environmental sciences, General Environmental Science |
| الوصف: | The study compared the sequences of daily rainfall over coastal southern and semi-arid northern Nigeria. Daily rainfall occurrences for 41 years (1971–2011) over four meteorological stations in Lagos, Rivers, Borno, and Katsina were analyzed using frequency analysis and Markov chain model. Findings indicate that the coastal area had a predominance of 2–4-day wet spells while the semi-arid area showed a wet spell distribution that is geometric in nature with 1-day spell predominance. The dry spell behavior was nearly the opposite of the wet spell occurrence. The coastal region showed a dry spell of 1–4-day spell predominance while the semi-arid region showed a predominance of higher dry spells of 2–6 days. Accumulation of the amount of rainfall in each spell also showed that much rainfall from the coastal area was obtained from rains of spells of 3 days and above while the semi-arid had more of its rain from spells of 1–3 days. The mean annual rainfall was 1423.75 mm (Lagos), 2173.56 mm (Rivers), 517.50 mm (Katsina), and 578.34 mm (Borno). The wettest month was June (274.08 mm) in Lagos, September (378.18 mm) in Rivers, and August in Katsina and Borno (172.98 and 184.81 mm, respectively). The driest months were January for Lagos and Rivers (15.77 and 18.96 mm, respectively) and November–February for Katsina and Borno (0–0.06 mm). This showed that the coastal areas had nearly three times the volume of rain in the semi-arid area. The study further showed that onset of rain for the coastal area was March/April while the cessation of rainy season was October/November. On the other hand, the onset of rainy season in the semi-arid area was May/June and cessation of rainy season was September. Findings portend drier days for the semi-arid area due to dry spell persistence and hence, the consequent challenges of providing artificial water supply for agriculture and other purposes especially from October to May. |
| تدمد: | 1866-7538 1866-7511 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::27f247f5f067591a1fae23bd78e5c754Test https://doi.org/10.1007/s12517-016-2719-9Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........27f247f5f067591a1fae23bd78e5c754 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18667538 18667511 |
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