Optimal Water Allocation Under Climate Change, Based on Stochastic Dynamic Programming Model Approach in Ribb Reservoir, Amhara, Ethiopia
Tóm tắt
Optimal operation of reservoir policies is very important for water resource planning, development, and management, but it is very challenging and complicated when dealing with climate change impacts. The objective of this paper was to assess the future irrigation and water supply development and operation at Ribb reservoir in the face of climate change. In this study, a calibrated and validated Soil and Water Assessment Tool (SWAT) was used to model runoff inflow into the Ribb reservoir under present and future climate scenarios. Inflow to the reservoir was simulated using hydro-climatic data. Observed and projected inflows to the reservoir were used as inputs to the stochastic dynamic reservoir operation model to optimize irrigation in reservoir release, storage, and final level pool storage. From the results of the model, the optimized release of a reservoir in the dry season, there is a shortage of water allocation to the irrigation demand in the normal operating policy. This implies the release does not meet the demand for further water supply systems in the dry season. This analysis can be used by water resources planners and managers to develop effective reservoir operation techniques with low climate change impact to increase water release both for irrigation and water supply for the local community.
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