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Water–Energy Nexus for Multi-Criteria Decision Making in Water Resource Management: A Case Study of Choshui River Basin in Taiwan

1
Department of Safety, Health and Environmental Engineering, National Kaohsiung University of Technology, Kaohsiung 824, Taiwan
2
Safety, Health & Environmental Center, Group Administration, Formosa Plastics Group, Taipei 105, Taiwan
3
Graduate Institute of Environmental Engineering, National Taiwan University, Taipei 106, Taiwan
*
Authors to whom correspondence should be addressed.
Water 2018, 10(12), 1740; https://doi.org/10.3390/w10121740
Received: 2 October 2018 / Revised: 8 November 2018 / Accepted: 24 November 2018 / Published: 27 November 2018
(This article belongs to the Section Water Resources Management and Governance)
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PDF [2631 KB, uploaded 27 November 2018]
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Abstract

The Choshui river basin, the mother river in Taiwan, suffers from severe water shortage from extensive water use in irrigation as well as land subsidence from over-pumping of groundwater. To address these challenges, several water-related strategies and actions, including enhancement of water-use efficiency, development of alternative water sources, and improvement in effective water management, were proposed in this study to support sustainable water resource management in the watershed. Management of water resources in Taiwan is expected to confront not only freshwater resource but also energy source constraints. Multi-criteria decision analysis (MCDA), an approach for ranking overall performances of decision options, was then used to prioritize the water resource management strategies. The analysis considered economic (economic feasibility) and environmental (stability from the influence of climate change) criteria in the context of water–energy nexus (water supply/conservation potential and systemic energy efficiency). Our results indicated that, while economic feasibility was considered as the most important factor in implementation of the practices, improvement in groundwater pumping control and management was ranked as a high-priority water resource management action, followed by initiating water conservation programs for residential sector and reducing leakage rate for agricultural irrigation canals. The results from this study are expected to provide direction for future decision making in water resource management. View Full-Text
Keywords: water–energy nexus; MCDA; water-use efficiency; wastewater reclamation; green infrastructure water–energy nexus; MCDA; water-use efficiency; wastewater reclamation; green infrastructure
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Lee, M.; Yu, C.-Y.; Chiang, P.-C.; Hou, C.-H. Water–Energy Nexus for Multi-Criteria Decision Making in Water Resource Management: A Case Study of Choshui River Basin in Taiwan. Water 2018, 10, 1740.

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