Iran-Water Resources Research

Iran-Water Resources Research

Evaluating Water Resources Supply and Demand Using WEAP-MABIA (Case Study: Gadar River Basin)

Document Type : Original Article

Authors
1 Ph.D. Student in Water Resources Engineering, Water Engineering group, Urmia University, Urmia, Iran.
2 Director of Environment Department of Lake Urmia Research Institute and Associate Professor of Hydrology, Water Engineering Group, Urmia University, Urmia, Iran.
3 Associate Professor of Hydrology and Water Management, Energy, Environment and Water Research Centre (EEWRC), Cyprus Institute, Aglantzia, Cyprus.
4 Professor of Water Governance, Faculty of Governance, University of Tehran, Tehran, Iran.
Abstract
Currently, numerous sub-basins located in the Urmia Lake Basin (ULB) are experiencing water shortages. Gadar-Chai River basin is one of the most important basins in ULB in which proper water allocation and management are paramount of importance. A decision support system based on a water evaluation and planning system (WEAP) could be highly beneficial in water allocation plans at the basin scale. In this research, the WEAP-MABIA model has been used to analyze and simulate water supply and demand in the three major catchments of Gadar-Chai River basin. The year 2009 was chosen as the base year of modeling, all nodes of resources and consumptions were created, and the rainfall-runoff was simulated. Then, the Gauss-Levenberg-Marquardt optimization algorithm, embedded in the PEST tool, is implemented for calibration. The efficiency of the model is verified by the Nash-Sutcliffe coefficient for the calibration and validation period, which is ranged from 0.68-0.87. Ultimately, several management strategies such as a slight increase in irrigation efficiency, fallow implementation, and cultivation of low-demanded were employed to investigate the sustainability of water resources in the Gadar-Chai River basin. The results revealed that simultaneous implementation of %10 fallow along with 5% increase in irrigation efficiency could enhance the water supply reliability compare to status que by %12, %19, and %11 respectively in Oshnaviyeh, Naqadeh and Hasanlu basins. Hence, this scenario, with decreasing the unmet demand, would play a major role to ameliorate the water shortages in the study area.
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  • Receive Date 21 June 2023
  • Revise Date 01 August 2023
  • Accept Date 06 August 2023