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Decision-Making Methodology for Risk Management Applied to Imja Lake in Nepal
- Source :
- Water, Vol 9, Iss 8, p 591 (2017), Water; Volume 9; Issue 8; Pages: 591
- Publication Year :
- 2017
- Publisher :
- MDPI AG, 2017.
-
Abstract
- Glacial retreat causes the formation of glacier lakes with the potential of producing glacial lake outburst floods (GLOFs). Imja Lake in Nepal is considered at risk for a GLOF. Communities in the path of a potential Imja GLOF are implementing adaptation projects, yet no quantitative data or guidance is available to understand the benefits of these projects or how to weigh benefits against the cost of implementation. We develop and demonstrate a decision-making methodology for GLOF risk management, incorporating available scientific information and uncertainty. The methodology consists of (1) identifying flooding scenarios, (2) evaluating scenario consequences, and (3) performing an economic analysis of proposed adaptation projects. The methodology is applied to assess benefits in Dingboche of lowering Imja Lake by 3, 10 and 20 m. The results show that the baseline case (no lake lowering) has the lowest expected cost because of low valuation of agricultural land and homes in the literature. Nonetheless, the result is sensitive to changes in the analysis variables. We also found that lowering the lake by 10 or 20 m is efficient according only to the methodology used here; however, considering only direct economic damages and literature cost estimates, the costs outweigh the benefits for these projects.
- Subjects :
- lcsh:Hydraulic engineering
010504 meteorology & atmospheric sciences
Cost estimate
0208 environmental biotechnology
Geography, Planning and Development
glacial lake outburst flood
Glacial lake outburst flood
02 engineering and technology
Aquatic Science
01 natural sciences
Biochemistry
risk management
decision making
lcsh:Water supply for domestic and industrial purposes
Imja Lake
Agricultural land
lcsh:TC1-978
Environmental planning
Risk management
0105 earth and related environmental sciences
Water Science and Technology
Valuation (finance)
Hydrology
decision analysis
lcsh:TD201-500
business.industry
Flooding (psychology)
020801 environmental engineering
Environmental science
data envelopment analysis
Glacial lake
business
Decision analysis
Subjects
Details
- Language :
- English
- ISSN :
- 20734441
- Volume :
- 9
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- Water
- Accession number :
- edsair.doi.dedup.....e271a52f942f44cf9827c96125a6fb48