Changes in short term river flow regulation and hydropeaking in Nordic rivers.

Changes in short term river flow regulation and hydropeaking in Nordic rivers.
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DOI:
10.1038/s41598-018-35406-3
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发表时间:
2018-11-22
期刊:
影响因子:
4.6
通讯作者:
Marttila H
Marttila H
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ashraf FB;Haghighi AT;Riml J;Alfredsen K;Koskela JJ;Kløve B;Marttila H

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量化河流流量的短期变化对于理解水力发电对环境的影响非常重要。能源市场可能迅速变化,能源需求在亚日尺度上波动,这可能导致受调节的河流流量(水力调峰)发生相应变化。由于可再生能源的使用越来越多,未来水电作为负荷平衡电源将发挥更大的作用。这可能会增加北欧河流系统目前的水力峰值水平,对维持健康的生态状况造成挑战。本研究使用来自150个站点的大量数据集(每小时时间步长河流流量数据),研究了北欧河流水力调峰的驱动力。它还调查了增加风力发电对水力调峰的影响。数据显示,北欧河流的水力调峰水平很高,在过去十年中,特别是在过去几年中有所增加。这些结果表明,可再生能源建筑的增加可能会增加北欧河流的水力调峰。
Quantifying short-term changes in river flow is important in understanding the environmental impacts of hydropower generation. Energy markets can change rapidly and energy demand fluctuates at sub-daily scales, which may cause corresponding changes in regulated river flow (hydropeaking). Due to increasing use of renewable energy, in future hydropower will play a greater role as a load balancing power source. This may increase current hydropeaking levels in Nordic river systems, creating challenges in maintaining a healthy ecological status. This study examined driving forces for hydropeaking in Nordic rivers using extensive datasets from 150 sites with hourly time step river discharge data. It also investigated the influence of increased wind power production on hydropeaking. The data revealed that hydropeaking is at high levels in the Nordic rivers and have seen an increase over the last decade and especially over the past few years. These results indicate that increased building for renewable energy may increase hydropeaking in Nordic rivers.
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