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Modification of blaney-morin-nigeria evapotranspiration model for Asaba and Uyo, South-south Nigeria CIGR Journal
Alabi, Habeeb Adedotun; EKECHUKWU nee Umego, Okwunna Maryjane; Ilesanmi, Oluwaseun Ayodele; Ilesanmi, Oluwaseun Ayodele; Ewemoje, Temitayo Abayomi.
The study was designed to re-examine and modify the Blaney-Morin-Nigeria (BMN) evapotranspiration (ET) model which was developed for Asaba and Uyo in South-south of Nigeria. This was achieved using a non-linear iterative technique based on Levenberg-Marquardt algorithm, making use of climatic variables. The newly developed model constants were H = 288.0, m = 0.96; H = 285.8, m = 0.91 and H = 287.0, m = 1.00 for South-south Nigeria, Asaba and Uyo respectively compared to the H = 520.0, m = 1.31 for the original BMN ET model. Data were analysed using different statistical models. The three newly developed BMN models when compared with FAO-56 PM model which was used as standard gave a more satisfactory RET estimates than the original BMN ET model when...
Tipo: Info:eu-repo/semantics/article
Ano: 2023 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8521
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Assessing the Impact of Changing Climate on Crop Water Requirements in Nigeria. CIGR Journal
Ilesanmi, Oluwaseun Ayodele.
Climate change is a phenomenon most of the world is recently coming to terms with but unfortunately, the African region is yet to fully understand and prepare for its effects. The change is predicted to herald positive results likewise potentially severe consequences for global food security. This study aims to improve the understanding of the impact these changes being experienced in the Nigerian climate system will have on Crop Water Requirements (CWR) for optimal productivity. Five statistically downscaled and bias-corrected Global Climate Models (GCMs): CCCMA, NOAA, MIROC, ICHEC, and NCC were applied in the estimation of CWR through the period 1985–2100 under the Representative Concentration Pathway RCP8.5. These were used to produce values of crop...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crop water requirement; Climate Change; Nigeria; Rainfall; Temperature; Representative Concentration Pathways.
Ano: 2023 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7521
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