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Climate change impacts and greenhouse gas mitigation effects

Thursday, 25 May 2017 Read 157 times Written by 

Climate change impacts and greenhouse gas mitigation effects on U.S. hydropower generation

Brent Boehlert a,b,*, Kenneth M. Strzepek b, Yohannes Gebretsadik c, Richard Swanson d, Alyssa McCluskey d, James E. Neumann a, James McFarland e, Jeremy Martinich e

a Industrial Economics, Inc., Cambridge, MA, USA

b Massachusetts Institute of Technology, Cambridge, MA, USA

c World Institute for Development Economics Research, Helsinki, Finland

d University of Colorado, Boulder, CO, USA

e U.S. Environmental Protection Agency (EPA), Washington, D.C., USA

 

Abstract

Climate change will have potentially significant effects on hydropower generation due to changes in the magnitude and seasonality of river runoff and increases in reservoir evaporation. These physical impacts will in turn have economic consequences through both producer revenues and consumer expenditures. We analyze the physical and economic effects of changes in hydropower generation for the contiguous U.S. in futures with and without global-scale greenhouse gas (GHG) mitigation, and across patterns from 18 General Circulation Models. Using a monthly water resources systems model of 2119 river basins that routes simulated river runoff through reservoirs, and allocates water to potentially conflicting and cli-mate dependent demands, we provide a first-order estimate of the impacts of various projected emis- sions outcomes on hydropower generation, and monetize these impacts using outputs from an electric sector planning model for over 500 of the largest U.S. hydropower facilities. We find that, due to generally increasing river runoff under higher emissions scenarios in the Pacific Northwest, climate change tends to increase overall hydropower generation in the contiguous U.S. During low flow months, generation tends to fall with increasing emissions, potentially threatening the estimated low flow, firm energy from hydro- power. Although global GHG mitigation slows the growth in hydropower generation, the higher value placed on carbon-free hydropower leads to annual economic benefits ranging from $1.8 billion to $4.3 billion. The present value of these benefits to the U.S. from global greenhouse gas mitigation, discounted at 3%, is $34 to $45 billion over the 2015–2050 period.

 

© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license

Corresponding author at: Industrial Economics, Inc., Cambridge, MA, USA.

E-mail address: This email address is being protected from spambots. You need JavaScript enabled to view it. (B. Boehlert).

http://dx.doi.org/10.1016/j.apenergy.2016.09.054

0306-2619/© 2016 The Authors. Published by Elsevier Ltd.

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

 

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