Modeling Surface Water Resources for Effective Water Allocation Using Water Evaluation and Planning (WEAP) Model A Case Study on Finchaa Sub basin, Ethiopia

Abstract

The objective of the study is to model the surface water resources of the sub basin for effective water allocation which is a key to sustainable water management. For this study Water Evaluation and Planning (WEAP) model was used to model the current situation of water supply and demands and also to create scenarios for future water demands and supply. All the required data by the model was collected from different sources and the model was set up for a current account year and last year of scenarios based on the available data. The result from the current situation of water demands among water users were indicated that all demands were satisfied fully and the unmet demand under the base year was zero. Four scenarios for future water demand were created to forecast the trends of future water demands. The results of these scenario showed that the increment of water demands and unmet water demands from year to year. In addition, one scenario was created for future water availability and the result showed that the decrement of future water availability due to the impact of climate change. Finally, different options were proposed to get balance of supply and demand.