3 0 obj Since this territory is located in an over-inflated zone, a peculiar high-mountain vegetation has formed here. h�bbd``b`�+�S?���@�QH��BAbQ �2H��e$4�`�T�@,s Qy�����d(�H"�3u_ 0 � � Olofintoye et al. The results show that the greatest amounts of rainfall are obtained in the southern and western parts of the State and on the southern and western margins of the high Plateau in particular. The temporal pattern showed a general decline in rainfall over Nigeria in the last century. Nigeria, showing principal places mentioned in the text 9 Map 2. Precipitation is heavier in the south, especially in the southeast, which receives more than 120 inches (3,000 mm) of rain a year, compared with about 70 inches (1,800 mm) in the southwest. Ayansina et al. The highest mean annual rainfall of 2,380 mm occurred at Owerri while the lowest of 1,860 mm occurred at Enugu. ��oU)mx[��tP��,4h�T[V�Bu��V,�E����ݫ�_o��f�F�S�`�+����q��^��������^.A��t������vl�� (z������ �kw�\[��+���C����ȷ��6��F����N�@VUiM6���������w �ﻥ-i��l��Ͽ���f�W;���XGs��J1���#uԎP5�@�u!�퇾��|x���A�n����l��u!�{����ٖ�4K�����u��dEh��\�h[����WW$��)�D�8B�X���WK��%�G�n'����s?.����_㪑>����i�t������e�bCS[�c ��{P�� ��o���|� P��᜛�@G�� M�Aqu��+��/Ԣ�U�q���� 31°C. (2009) also investigated the seasonal rainfall variability in Guinea savannah part of Nigeria and concluded that rainfall variability continues to be on the increase as an element of climate change. Irrigation serves as buffer or insurance for climate change and variability. (1988), Adejuwon et al. x��=�rǑ��?�㴗hv��-+KQ�Mےh��}��4���ӠD�?~+���(6f�����;� to peak daily precipitation in Nigeria. Lower rainfall in the north, for example, reduces the availability of trees and biomass for Katsina. Rainfall data for one hundred years (1914-2013) of Aminu Kano International Airport synoptic meteorological station obtained from Nigerian Meteorological Agency Climate change and variability impact may result in increase or decrease in rainfall. Rainfall variation is projected to continue to increase. Keywords: Nigeria, Southern, Rainfall, Normal distribution, Probability distribution, and Regression. INTRODUCTION 5 II. In the north (see Sokoto, Kano, Maiduguri), the rainy season lasts only four months, from June to September; in the center (see Abuja), it goes from April to October; while in … endobj Rahaji cattle in Nigeria 24 Map 6. He applied the Gumbel EVT-1 distribution to the maximum period of ten year records available to derive rainfall IDF models. Rainfall decreases progressively away from the coast; the far north receives no more than 20 inches (500 mm… To fit a model: this can be used for forecasting, monitoring or even feedback and feed forward control. Map 1. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 195 0 obj <>/Filter/FlateDecode/ID[<43515409B907D34DB33FD7B103741495>]/Index[178 68]/Info 177 0 R/Length 84/Prev 64635/Root 179 0 R/Size 246/Type/XRef/W[1 2 1]>>stream ?�S���[j������>��[�l��#(^;i�4G�6z"�>���UmR9�ʱ>�4�i��U9m�H�4��� �4�w�����d��-B�#��Bm���rRk�{,�Xc���$��}uC6`��O� Dl�4#t�h�ƏV:�i'! Precipitation in southern areas is expected to rise and rising sea levels are expected to exacerbate flooding and submersion of coastal lands (Akande et al., 2017; Ebele and Emodi, 2016). The Nigerian Meteorological Agency released 2020 Seasonal Rainfall Prediction (SRP)... Read More. [11] found that the LN2 distribution was the best-fit probability distribution for one to five consecutive days’ maximum rainfall for Accra, Ghana. T . endobj Average total May-October rainfall in Nigeria based on the 1981-2015 historical record (mm) Source: FEWS NET/USGS CHIRPS . rainfall distribution but from 1997 to 2009the outputs of yam do not follow the, trend again. [��4������n{x6|Nz_�K�8�k�a,Y��9X������6�a�{x"� e��85���O�m����oܓz-jM����r�/�����ܒ�(�Vmo��cc��n�����}rQ jp�����q��.����n��w����0������YP�W�`��x�;D=���Π�y#�V8Q z��pdE��D,�����!pgHE0/���u�p�n��L R"^]AHGz��pp� �"���t�n Quarterly rainfall distribution data of Ibadan as a case study were collected for a period of 43 years (1971-2013) from Nigeria Meteorological Agency (NMA) quoted in Central Bank of Nigeria (CBN) bulletin. objective of the study is to examine the impact of climatic factors (rainfall, minimum and maximum temperature on cereals production in Sokoto state, Nigeria. The distribution of rainfall throughout the year is as important as the total annual amount of monthly or annual rainfall when evaluating its impact on biosphere, hydrosphere, lithosphere and atmosphere. 39°C. The time series analysis was used to model and forecast the quarterly rainfall. Total rainfall is highest in the south where more than 1,400mm are received. Enugu. 32°C. <> Corresponding e-mail: domegacometh@yahoo.com; Phone: +234(0)8065345364; 9021728394 Abstract: - Choosing a probability distribution to represent the precipitation depth at various durations has long been a topic of 1 Rainfall characteristic of Niger Republic 2 2.1 C. S. Okoli Department of Civil Engineering, Federal University of Technology, Akure, Nigeria (okolics2002@yahoo.com) The paper presents a study on the rainfall variability and distribution in Niger republic. Three methods (i) arithmetic method. Spatial distribution of annual rainfall (mm yr −1) and the corresponding coefficient of variation (%). Different time series methods with different objectives were employed to analyze rainfall data in various literatures. The cdf is very helpful to set threshold values below or above which certain rainfall events occurs. Maiduguri. 39°C. Furthermore, there is no observed nexus between the cassava output and the annual rainfall distribution that is, rainfall variability has no effect on the cassava productivity. Agriculture in Nigeria is a branch of the economy in Nigeria, providing employment for about 35% of the population as of 2020. Kano. world in terms of distribution across time and space, although dry spells and droughts are part of a normal cycle. distribution infrastructure Poor water management at hydropower plants Operational inefficiencies Non-cost reflective electricity tariff and liquidity constraints Inadequate gas supply Limited transmission lines 7 September 2019. In Nigeria, the development of IDF models is still in its growth path and is limited to the extent of available data. 2 0 obj Accepted 29 November, 2011 This paper examined rainfall seasonality in the Niger Delta, Nigeria, using both monthly and annual rainfall data from 1931 to 1997. A wide central band of Nigeria receives 800-1,200mm between May-October. 3. To obtain an understanding of the underlying forces and structure that produced the observed rainfall data in the Lower Kaduna catchment of Kaduna state of Nigeria. In fact, there is a rainy season due to the African monsoon, which is progressively longer and more intense from north to south. It is the main source of livelihood for most Nigerians. Download : Download full-size image; Fig. ;�(��Q!-��_��Zޟ���v{r��Dv�Q�=%P����Cy[4�{ ��< ۖ��l�p*۲͛�ոM�{��]�J5��0K��-�&�=~��L���S՛{��Z���X�÷�� Rainfall seasonality in the Niger Delta Belt, Nigeria Joseph O. Adejuwon Department of Water Resources Management and Agrometeorology, University of Agriculture, Abeokuta, Ogun State. Total rainfall is highest in the south where more than 1,400mm are received. He applied the Gumbel EVT-1 distribution to the maximum period of ten year records available to derive rainfall IDF models. Typical May-October rainfall in Nigeria ranges widely across the country. Obot et al., (2011) studied the trends of rainfall in Abeokuta, Nigeria between 1981-2002. It is about 1 000 mm in the center of the country and 500 mm in the northeast. 2. It can't be called the richest in Nigeria because the air temperature is not high. 30°C. 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