UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Screening reservoir systems by considering the efficient trade-offs-informing infrastructure investment decisions on the Blue Nile

Geressu, RT; Harou, JJ; (2015) Screening reservoir systems by considering the efficient trade-offs-informing infrastructure investment decisions on the Blue Nile. Environmental Research Letters , 10 (12) 10.1088/1748-9326/10/12/125008. Green open access

[img] Text
erl_10_12_125008.pdf - Published version

Download (2MB)

Abstract

Multi-reservoir system planners should consider how new dams impact downstream reservoirs and the potential contribution of each component to coordinated management. We propose an optimized multi-criteria screening approach to identify best performing designs, i.e., the selection, size and operating rules of new reservoirs within multi-reservoir systems. Reservoir release operating rules and storage sizes are optimized concurrently for each separate infrastructure design under consideration. Outputs reveal system trade-offs using multi-dimensional scatter plots where each point represents an approximately Pareto-optimal design. The method is applied to proposed Blue Nile River reservoirs in Ethiopia, where trade-offs between total and firm energy output, aggregate storage and downstream irrigation and energy provision for the best performing designs are evaluated. This proof-of concept study shows that recommended Blue Nile system designs would depend on whether monthly firm energy or annual energy is prioritized. 39 TWh/yr of energy potential is available from the proposed Blue Nile reservoirs. The results show that depending on the amount of energy deemed sufficient, the current maximum capacities of the planned reservoirs could be larger than they need to be. The method can also be used to inform which of the proposed reservoir type and their storage sizes would allow for the highest downstream benefits to Sudan in different objectives of upstream operating objectives (i.e., operated to maximize either average annual energy or firm energy). The proposed approach identifies the most promising system designs, reveals how they imply different trade-offs between metrics of system performance, and helps system planners asses the sensitivity of overall performance to the design parameters of component reservoirs.

Type: Article
Title: Screening reservoir systems by considering the efficient trade-offs-informing infrastructure investment decisions on the Blue Nile
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1748-9326/10/12/125008
Publisher version: http://dx.doi.org/10.1088/1748-9326/10/12/125008
Language: English
Additional information: Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Keywords: infrastructure investment, reservoir screening, trans-boundary multi-reservoir systems, Nile river basin, many objective evolutionary optimization
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1485671
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item