Concluding Remarks

Climate change as a result of global warming will have a deep impact on surface and groundwater systems and, as a result, on the agriculture which is very responsive the climate change in a very short period time. Irrigation is a way of adaptation to the climate change and the deficit irrigation is a practical tool for the adaptation. However, the impact of such management results in salt accumulation in the soil zone reduces the fertility of the soil, as presented in this study. The reclamation of such soils is very expensive and requires complex technology. It is therefore essential to find a balance between deficit irrigation and its consequence of salt accumulation. The model measured results show that long stress treatment is not a viable solution. Short stress treatment is a delicate. Minimum stress treatment can be confidently employed. The transport model can satisfactorily simulate salt transport under optimum and minimum stress conditions. However, it does not perform well in predicting the concentrations in prolonged stress periods especially in the lower zones. Hence, the model should be improved to overcome this shortcoming or it should be used with care for the stress periods.

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