Browsing by Author "Uzoukwu, Regina Akudo"

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    Assessment of streamflow relationship models of selected rivers in southern Nigeria.
    (Federal University of Technology, Owerri, 2023-10) Uzoukwu, Regina Akudo
    This study focused on Assessment of Streamflow Relationship Models of Selected Rivers in Southern Nigeria. The rivers include; Cross River, River Niger, Owena River, Owan River, Ikpoba River, Ossiomo River and Imo River. Statistical methods of least squares (regression analysis) were used to develop streamflow mathematical models (Power model, Polynomial model and Analysis of Variance (ANOVA) model for regression) of the selected rivers. Models performance in calibration and verification were evaluated by means of coefficients of determination, coefficients of correlation, NashSutcliffe model efficiency, mean absolute relative error, percentage bias, root mean square error or standard error of estimate andmean of residuesor mean absolute error. Verification results exhibited a similar pattern in model performance to the calibration results, indicating that the models have good curve fitting. Comparisons of the streamflow models were carried out using One-way ANOVA F-Test, Variance Ratio Test or Snedecor’s F-distribution (F-Test). Further comparisons using graphs and a final comparison using Student’s t-Test were done. The models developed will serve useful purposes in the design of dams, estimation of the sizes of reservoirs, public water supply, flood control and hydropower generation, pisciculture, recreation, irrigation, wild life protection, water sports and tourism thus ushering in an era of socio-economic and industrial development for the Southern Nigeria. This research will play an important role in ensuring that water resources management processes in the Southern Nigeria are scientifically based and efficiently used so as to satisfy the needs of both natural systems and humanity, as being demonstrated in the applications of the calibrated models