Optimal Operation of Nashe Hydropower Reservoir under Land Use Land Cover Change in Blue Nile River Basin
Abstract
:1. Introduction
2. Materials and Methods
2.1. Description of the Study Watershed
2.2. Input Data Sets
2.2.1. Hydrological and Meteorological Data
2.2.2. Reservoir Data
2.3. Land Use Land Cover Change Scenarios
2.4. Model Development
2.4.1. SWAT Hydrological Model
2.4.2. HEC-ResPRM Model Description and Setup
2.5. Reservoir Optimization Operation
3. Results and Discussion
3.1. Reservoir Inflow under Land Use Land Cover Change
3.2. Reservoir Operation
3.3. Hydropower Generation under Land Use Land Cover Changes
3.3.1. Reservoir Inflow and Outflow
3.3.2. Reservoir Storage and Elevation
3.3.3. Reservoir Power Generation
3.4. Optimal Operating Rule Curves
4. Conclusions
- ▪
- The estimated optimal reservoir operations for all scenarios have distinct values but follow similar tendencies. This indicates that the seasonal hydropower generation is affected by stream flow, and that the future inflow from the reservoir area is substantially more susceptible to future LULC changes. The optimal rule curves that were developed perform significantly better under future inflow scenarios compared to current rule curves, which allow the reservoir to be more effective and appropriate in terms of water release and storage for future scenarios to generate more energy.
- ▪
- The optimal solution could maintain a higher level of water in the reservoir, and the optimized policy may increase hydropower generation during the wet season, while also increasing the possibility of water accessibility during the following dry season.
- ▪
- The possibility of improved water resource utilization in the future, particularly with vigorous operating rules that consider optimization and uncertainty, can be utilized as a guide for the future operation of hydropower planning. The development of appropriate reservoir operating rules is critical for planning and management, particularly from the perspective of LULC change.
- ▪
- The findings are intended to provide information to policymakers, water resource managers, and other interested stakeholders so that future development in the Nashe watershed of the Blue Nile River Basin can be more effective.
- ▪
- Furthermore, the findings suggest that the methodology utilized in this research can be used to evaluate and optimize current systems, as well as emphasize the importance of using predicted land use land cover change as an assessment tool for reservoir management in the future.
- ▪
- Generally, changes in LULC have an impact on the quantity of water available for energy generation in hydropower reservoirs. Land use land cover changes can cause soil deterioration (silting), which can affect both the watershed and the reservoir level as a result of sediment transport, and thus exacerbate the negative effects of climate change.
- ▪
- As a result, it is essential to perform studies that take into account a variety of variables in order to produce accurate scenarios for the future availability of water resources for hydropower generation, and to define regulations for flexible reservoir operation.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Leta, M.K.; Demissie, T.A.; Tränckner, J. Optimal Operation of Nashe Hydropower Reservoir under Land Use Land Cover Change in Blue Nile River Basin. Water 2022, 14, 1606. https://doi.org/10.3390/w14101606
Leta MK, Demissie TA, Tränckner J. Optimal Operation of Nashe Hydropower Reservoir under Land Use Land Cover Change in Blue Nile River Basin. Water. 2022; 14(10):1606. https://doi.org/10.3390/w14101606
Chicago/Turabian StyleLeta, Megersa Kebede, Tamene Adugna Demissie, and Jens Tränckner. 2022. "Optimal Operation of Nashe Hydropower Reservoir under Land Use Land Cover Change in Blue Nile River Basin" Water 14, no. 10: 1606. https://doi.org/10.3390/w14101606
APA StyleLeta, M. K., Demissie, T. A., & Tränckner, J. (2022). Optimal Operation of Nashe Hydropower Reservoir under Land Use Land Cover Change in Blue Nile River Basin. Water, 14(10), 1606. https://doi.org/10.3390/w14101606