%ARoy, Samuel%ARoy, Samuel%AUchida, Emi%AUchida, Emi%Ade Souza, Simone%Ade Souza, Simone%ABlachly, Ben%ABlachly, Ben%AFox, Emma%AFox, Emma%AGardner, Kevin%AGardner, Kevin%AGold, Arthur%AGold, Arthur%AJansujwicz, Jessica%AJansujwicz, Jessica%AKlein, Sharon%AKlein, Sharon%AMcGreavy, Bridie%AMcGreavy, Bridie%AMo, Weiwei%AMo, Weiwei%ASmith, Sean%ASmith, Sean%AVogler, Emily%AVogler, Emily%AWilson, Karen%AWilson, Karen%AZydlewski, Joseph%AZydlewski, Joseph%AHart, David%AHart, David%BJournal Name: Proceedings of the National Academy of Sciences; Journal Volume: 115; Journal Issue: 47; Related Information: CHORUS Timestamp: 2020-11-14 14:02:04 %D2018%IProceedings of the National Academy of Sciences %JJournal Name: Proceedings of the National Academy of Sciences; Journal Volume: 115; Journal Issue: 47; Related Information: CHORUS Timestamp: 2020-11-14 14:02:04 %K %MOSTI ID: 10078939 %PMedium: X %TA multiscale approach to balance trade-offs among dam infrastructure, river restoration, and cost %X

Aging infrastructure and growing interests in river restoration have led to a substantial rise in dam removals in the United States. However, the decision to remove a dam involves many complex trade-offs. The benefits of dam removal for hazard reduction and ecological restoration are potentially offset by the loss of hydroelectricity production, water supply, and other important services. We use a multiobjective approach to examine a wide array of trade-offs and synergies involved with strategic dam removal at three spatial scales in New England. We find that increasing the scale of decision-making improves the efficiency of trade-offs among ecosystem services, river safety, and economic costs resulting from dam removal, but this may lead to heterogeneous and less equitable local-scale outcomes. Our model may help facilitate multilateral funding, policy, and stakeholder agreements by analyzing the trade-offs of coordinated dam decisions, including net benefit alternatives to dam removal, at scales that satisfy these agreements.

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