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Analyzing investments for managing Lake Erie levels under climate change uncertainty
Author(s) -
Venkatesh Boddu N.,
Hobbs Benjamin F.
Publication year - 1999
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/1998wr900124
Subject(s) - climate change , global warming , environmental science , resource (disambiguation) , outflow , environmental resource management , computer science , meteorology , geography , ecology , computer network , biology
Analyses of investments that are irreversible and have uncertain benefits should consider the option of delaying a decision. For instance, the benefits of many water resource projects could change if global warming occurs. The magnitude of that warming is uncertain, and delaying projects until more information is available might be optimal. We examine whether this is true for construction of an outflow control structure for Lake Erie. Using Bayesian Monte Carlo (BMC)–based decision analysis, we find that considering climate uncertainty does make a difference. Climate change beliefs, in the form of prior distributions over transient climate scenarios, can affect the optimal strategy: in particular, climate change makes delaying construction more attractive. The option value of deferring the decision to build is as high as $20 million. Ignoring the possibility of climate warming can inflict an expected penalty as large as 20% of the cost of the control structure. We also compare climate risks to uncertainties in stage‐damage curves and find that they are approximately of equal importance.