Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1088/1748-9326/aad19f |
Non-stationary hydropower generation projections constrained by environmental and electricity grid operations over the western United States | |
Zhou, Tian1; Voisin, Nathalie1,2; Fu, Tao1 | |
2018-07-01 | |
发表期刊 | ENVIRONMENTAL RESEARCH LETTERS |
ISSN | 1748-9326 |
出版年 | 2018 |
卷号 | 13期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | In the western United States, 27% of electricity demand is met by hydropower, so power system planners have a key interest in predicting hydropower availability under changing climate conditions. Large-scale projections of hydropower generation are often simplified based on regression relationships with runoff and they are not always ready to inform power system models due to the coarse time scale (annual) or limited number of represented power plants. We developed an enhanced process-based hydropower model to predict future hydropower generation by addressing the commonly under-represented constraints, including (1) the ecological spills, (2) penstock constraints to provide flexibility in electricity operations, and (3) biases in hydro-meteorological simulations. We evaluated the model over the western United States under two emission scenarios (RCP4.5 and RCP8.5) and ten downscaled global circulation models. At the annual time scale, potential hydropower generation is not projected to change substantially, except in California. At the seasonal time scale, systematic shifting of the generation patterns can be observed in snowmelt-dominated regions. These projected annual and regional trends are comparable to other regression-based relationships. However, the representation of more complex operations and constraints tend to reduce the uncertainties inherent to climate projections at seasonal scale. In the Pacific Northwest region where hydropower is the dominant electricity source, our predicted future change of hydropower generation is about 10% less than the regression-based projections in spring and summer. The model can also capture the seasonal non-stationary in hydrologic changes. The spatio and temporal scales of the model, increased accuracy and quantification of uncertainty allow one to use the products to inform power system models toward supporting energy sector planning activities and water-energy trade-offs. |
英文关键词 | hydropower climate change western US flow regulations WECC |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000439296200001 |
WOS关键词 | LAND-SURFACE WATER ; CLIMATE-CHANGE ; RIVER-BASIN ; MODEL ; IMPACTS ; ENERGY ; MANAGEMENT ; RESOURCES ; VULNERABILITY ; SENSITIVITY |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/32110 |
专题 | 气候变化 |
作者单位 | 1.Pacific Northwest Natl Lab, Richland, WA 99354 USA; 2.Univ Washington, Civil & Environm Engn Dept, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Zhou, Tian,Voisin, Nathalie,Fu, Tao. Non-stationary hydropower generation projections constrained by environmental and electricity grid operations over the western United States[J]. ENVIRONMENTAL RESEARCH LETTERS,2018,13(7). |
APA | Zhou, Tian,Voisin, Nathalie,&Fu, Tao.(2018).Non-stationary hydropower generation projections constrained by environmental and electricity grid operations over the western United States.ENVIRONMENTAL RESEARCH LETTERS,13(7). |
MLA | Zhou, Tian,et al."Non-stationary hydropower generation projections constrained by environmental and electricity grid operations over the western United States".ENVIRONMENTAL RESEARCH LETTERS 13.7(2018). |
条目包含的文件 | 条目无相关文件。 |
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