Samuel Ogungbe and Shamsideen Ojoye 2026. Rainfall Variability, Return Periods and an ARIMA-Based Rainfall Forecasting Model for River Niger at Lokoja, Kogi State, Nigeria (1986–2020). Journal of Science Innovation and Technology Research. 13, 9 (Sep. 2026). DOI:https://doi.org/10.70382/ajsitr.v13i9.084.