Annual rainfall totals, growing season rainfall totals and annual raindays of 27 Nigerian meteorological stations with varying lengths of records from 1903 to 2012 were collected from the Nigerian Meteorological Agency (NIMET). Climate change is perhaps the most serious environmental threat to the fight against hunger, malnutrition, disease and poverty in Africa, mainly through its impact on agricultural productivity. The paper is designed to study the rainfall patterns and its implications in Nigeria. Ezekiel A.A. 2, Ganiyu, M.O. It decreases from the south to the north, the rainfall comes late and not evenly spread across the rainy season and consequently has adverse effect on agricultural activities (Iloeje, 1981). On the Annual and Seasonal Pattern of Rainfall Fluctuations in Sub-Saharan West Africa. ANALYSIS Of RAINfALL PATTERN NVIRONMENT AND fLOOD INCIDENCES IN wARRI METROPOLIS, NIGERIA Rhoda Olanrewaju 1, Buku Ekiotuasinghan , Godwin Akpan1* 1Department of … View the article PDF and any associated supplements and figures for a period of 48 hours. Article/chapter can be printed. Statistical approach was deployed to determine the confidence levels, coefficients of kurtosis, skewness and coefficient of variations. characterized rain day patterns, with the highest rain day period in 1999 and lowest in 1987. In northern Nigeria, the peak monthly mean rainfall amount of 91 mm was observed in August and rainfall amount was very low in January (0.0 mm), February (0.0 mm), March (0.0 mm) and December (0.0 mm). Nigeria and it is the grain belt of the country populated by small scale subsistence farmers and nomadic livestock herders. The country’s north-south extent is about 1 050 km and its maximum east-west extent is about Rainfall data was collected from the archives of Nigerian Meteorological Agency; and oral interview was also conducted. N and longitude 8. He employed univariate Box-Jenkins method to analyze rainfall in the region and found that SARIMA model is suitable for forecasting future value of monthly rainfall and temperature data and used this model to forecast 12-month rainfall pattern in the study area. Ekpoh and the changing rainfall pattern the changing rainfall pattern during the main growing season (March, April and May) and the associated effects on subsistence agriculture in Laikipia east District of Kenya. The study 0000001301 00000 n Apart from the general southward shift in rainfall patterns, the duration has also reduced from 50-360 (1993-2003) to 30-280 (2003-2013) rainy days per year. Rainfall is one of the climatic factors that can indicate climate change. 3 Fig.1.3 Map of Nigeria Showing the Location of the North-East Region 4 Fig.1.4 North East Nigeria showing the six states 6 Fig.1.5 Adamawa State showing the 21 LGAs 7 Fig.1.6 Bauchi State showing the 20 LGAs 8 Fig.1.7 Borno State showing the 27 LGAs 9 Unlimited viewing of the article/chapter PDF and any associated supplements and figures. startxref Check out Abstract. Climate data and weather averages in Ibadan. The rainfall pattern has also enhanced wind erosion/desertification, soil erosion and coastal flooding in the north, east and coastal areas of Nigeria respectively. This study examines the length of the growing season in Nigeria using the daily rainfall data of Ikeja, Ondo, Ilorin, Kaduna and Kano. Achieving Human Development for Nigeria’s North East. Based on weather reports collected during 2005–2015. The 1961–1970 and 1951–1960 decades were thereafter ranked as the wettest in southern and northern Nigeria during the 20th century, respectively. 0 H�tVMs�6��W�v,� �ӓ�8��ݱ�S���$44������- Jr;�EJX�}x���w7��m���Ż�VL�z}!��K��E��狘m�_7�q��?E��2qvwU~/�Xf����L��oM�����yϮWϑ�"�:����?�_Β�*izN��2��i���,e��Oa9f+) awholehaswitnessed11,640v iolentdeathsthusfarinmid;2014,morethaninall! It also shares a border with the self-declared, but internationally unrecognized state of Ambazonia in the southeast. Nigeria.Accesstolandhasbeenshown Energy: Climate change is expected to negatively impact the already limited electrical power supply in Nigeria, through impacts on hydroelectric and thermal generation (Ebele and Emodi, 2016). Department of Agricultural Economics, LAUTECH, Ogbomoso, Oyo State . In this paper, Standard Precipitation Index (SPI) and Coefficient of Variability statistical tools 0000003742 00000 n 0000013952 00000 n The rain-day series in Nigeria have been examined for periodicities, fluctuations and trends for four regions arranged from south to north (the Coastal, Guinea-Savanna, Midland and Sahelian zones) based on data collected for the period 1919–1985. This drop in rain days might have a negative toll on yam (fig.1), maize (fig.2) and cassava (fig.3) as indicated by sharp fall in output between 1985 and 1987. Ile-Ife: Obafemi Awolowo University. Checkout. I. He has found that the date of start of the growing season is occurred annual rainfall distribution while the output of yam between1992 and1996followed the pattern of rainfall distribution but from 1997 to 2009the outputs of yam do not follow the, trend again. �h�Yd) �d�```qk 25@���P4��\ F�[@Z����*1�p While Nigeria is a relatively wealthy country, it ... to changing rainfall patterns, shifting water tables and desertification.248 Rather than invest in staple crops that might reduce dependencies on foreign imports, the Government has focused ... pdf. INTRODUCTION nalysis of rainfall data strongly depends on its distribution pattern. It has long been a topic of interest in the fields of meteorology in establishing a probability distribution that provides a good fit to daily rainfall. In this work, the non-parametric Mann-Kendall test is used to test for significant trend in rainfall in Nigeria through 31 24 Rainfall is the most important natural factor that determines the agricultural production in Nigeria, particularly in the South western part of Nigeria. Abstract: The pattern of rainfall in Akure has been haphazard, because it has not followed its natural trend for a long time as a result of climate change effect. The paper is designed to study the rainfall patterns and its implications in Nigeria. Keyword: Rainfall, Niger delta, Rainfall pattern Rainfall variation, Coefficient of Rainfall Variation I. This has taken a more pronounced dimension due to climate change. “Rainfall Trends in the Sudano – Sahelian Ecological Zone of Nigeria “that annual rainfall has increased from 1990-2009. Here is the average rainfall. In fact, there is a rainy season due to the African monsoon, which is progressively longer and more intense from north to south. Arising from the influence of climate change on rainfall pattern in Nigeria over the years, this study was undertaken to investigate the link between rainfall trend and agricultural production in Nigeria in the light of food security. The Nigeria. 0000007715 00000 n 0000002997 00000 n The importance of the knowledge of rainfall pattern has necessitated many researchers to carryout studies on the subject. xref STATE, NIGERIA (1990-2009) Akinniran, T. N. 1. In their paper entitled „Analysis of Introduction The Niger Delta region is situated at the apex of the Gulf of Guinea on the west coast of Africa and on the Nigeria‟s South–South geopolitical zone. Internatinal Journal of Climatology, 10: 810-848. 0000003239 00000 n Rainfall Pattern in Nigeria It is a common believe that all water on the earth comes from the rain and stored as surface water such as rivers, ponds, oasis, or underground water as spring and water table etc. Olaniran (1990) considered the changing pattern of rainy days in Nigeria between 1919-1985. 4. Data was collected from the Nigerian Meteorological Agency, Oshodi, Lagos state, Nigeria. %%EOF FSN-FM 0005 EFFECT OF RAINFALL PATTERN ON FISH PRODUCTION IN OGUN STATE, NIGERIA 1OLAOYE, O. J., 2AKINTAYO, I. The . This has taken a more pronounced dimension due to climate change. Adejuwon JO, Balogun EE, Adejuwon SA 1990. 54 0 obj<>stream Lower rainfall in the north, for example, reduces the availability of trees and biomass for distribution of rainfall, climate pattern and hyrdogeological units from the coastal areas to the Sahel regions of Nigeria provide a framework for the identification of the threats in terms of quantity and quality. rainfall years are in both the modelling and the validation periods. Annual rainfall varies in Nigeria. O. COLE Agricultural Media Resources and Extension Centre University of Agriculture, Abeokuta, Ogun State, Nigeria1 Nigeria Institute for Oceanography and Marine Research Victoria Inland, Lagos State, Nigeria 2 Nigeria GeoGraphy, climate aNd populatioN Nigeria is located in the tropical zone of West Africa between latitudes 4°N and 14°N and longitudes 2°2’E and 14°30’E and has a total area of 923 770 km2. 2. monthly rainfall and temperature in Northern region based on Bauchi station. The paper is designed to study the rainfall patterns and its implications in Nigeria. Unlimited viewing of the article/chapter PDF and any associated supplements and figures. Given this scenario, the 2011 rainfall in Nigeria is likely. For example, Adefolalu (1986) examines trends in rainfall pattern using 70-year period (1911–1980) rainfall data from 28 meteorological stations. Rainfall in the Nigerian Sudano –Sahelian region is characterized by considerable fluctuations and periods of diminishing annual totals especially in recent years. The study examines rainfall characteristics in Warri metropolis for the past 30 years (1986-2015). spending (Federal Government of Nigeria, 2013). The underlying cause of most droughts can be related to changing weather patterns such as low rainfall, reduced cloud cover and greater evaporation rates 0000010416 00000 n 0. 0000002047 00000 n A., 3UDOLISA, R. E. K. AND 3A. rainfall values over Nigeria while temporal and spatial trends were also investigated. These features are that of seasonality, long range dependency of observations and time trend as observed in the climatological series. The hot Harmattan wind from the Sahara sweeps across the northeastern areas which. Its coast lies on the Gulf of Guinea in the south and it borders Lake Chad to the northeast. Article/chapter can be printed. To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser. Obot et al., (2011) studied the trends of rainfall in Abeokuta, Nigeria between 1981-2002. 3, Adeyemo. Annual rainfall varies in Nigeria. It provides suitable conditions for many types of ecosystems, as well as water for hydroelectric power plants and crop irrigation. 0000000776 00000 n You can download the paper by clicking the button above. Landissuesarea!leading!causeofconflict!in! 31 0 obj <> endobj �*O�$�p�7�.��$��N�-�.�X�����ސ�u���S ���@,���pH3�}� w)i This seasonal variation of rainfall is the focus of this research. MATERIALS AND METHODS Akure is the capital of Ondo State (Figure 4), Nigeria and the major dominating town of Akure South Local Government. Article can not be downloaded. The variability of rainfall and the pattern of extreme high or low precipitation are very important for agriculture as well as the economy of the state. 0000011645 00000 n Generally, man’s comfortability depends mostly on the weather condition which largely depends on radiation from the sun and rainfall .Over the years, different kinds of radiation are considered. This paper examines the relationship between El Nino/Southern Oscillation (ENSO) and rainfall patterns in Nigeria. x�b```�V�L~�g`��0pLr"�w�x�``�_Pڰzf)D��Dэ�S�$Ot�� Inland, it decreases to around 130 cm (50 inch) over most of central Nigeria and only 50 cm (20 inch) in the extreme north. For instance, Ifabiyi et al.,6 discovered from their study “Rainfall Trends in the Sudano – Sahelian Ecological Zone of Nigeria “that annual rainfall has increased from 1990-2009. This study was checked annual average ... rainfall in northern Nigeria for the years 1951-1975. Epochal patterns of Indian summer monsoon rainfall It is well known that Indian summer monsoon rainfall displays multi-decadal variations in which there is a clustering of wet or dry anomalies (Pant and Kumar, 1997). Abstract. Climate data and weather averages in Port Harcourt. Drought or dry spells at the beginning or end of the season had a constant reoccurrence decimal since the beginning of the 20th century. Rainfall anomaly patterns in dry and wet years over Nigeria. 0000001444 00000 n Averages are for Ibadan Airport, which is 4 miles from Ibadan. The The . Rainfall is the most important natural factor that determines the agricultural production in Nigeria, particularly in the South Eastern part of Nigeria. The Niger Delta is located in the southern part of Nigeria. Annual Weather Averages Near Ibadan. Fig.1.1 Nigeria Population Structure, 2016 2 Fig.1.2 Nigeria Demography – by State and Sex. action on climate change, is helping adaptation efforts in developing countries. In Abuja, rainfall amounts to 1,200 mm (47 in) per year, including more than 100 mm (4 in) per month from May to October. Keywords: Nigeria, Southern, Rainfall, Normal distribution, Probability distribution, and Regression. Article/chapter can be downloaded. Rainfall data from twenty Nigeria stations, Sea Surface Temperature.tremendous crop failure whenever there are significant changes in rainfall pattern. 10! 0000010138 00000 n growing need to study the rainfall pattern, and also frequency of the heavy rainfall events. Rainfall amount and rainfall frequency for five individual dry and five individual wet years were compared with the 1941–1987 averages for Nigeria. Average rainfall along the coast varies from about 180 cm (70 in) in the west to about 430 cm (170 inch) in certain parts of the east. Ekpoh and Ekpenyong(2011) confirm the downward fluctuation of RF in North- West Nigeria, it was observed that RF from 1968-2008 mean RF has shifted downward by 8.8% from the long term mean. 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