Gully Erosion Control along NWORIE River in Owerri, Imo State-A Deterministic Model Approach

The study developed a model for gully erosion control. The model, helped to predict total soil loss per annum particularly in the catchment area of Nworie river. Other theoretical models were used to compare results obtained for soil prediction in gully erosion. A Deterministic Model was developed for the study which is called “Project Model” was formulated as for soil loss prediction in the catchment area. The model (formulated as an algorithm for optimizing the amount of soil loss). Soil loss value for Project model in the month of highest annual rainfall was 76.15 metric ton and while that of Universal Soil Loss Equation for the same month was 78.86 metric ton. The study also showed that rainfall depth contributed to soil loss in gully erosion. Test of confidence was carried out with Student t-test and Fisher’s test at 5% level of significance and found adequate of the deterministic model. It was recommended that for any known soil value, the project model can be adopted in calculating confidently the amount of soil loss in the area that may precipitate gully erosion.