The impacts of tidal turbines on water levels in a shallow estuary
The impacts of tidal turbines on water levels in a shallow estuary
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DOI：
10.1016/j.ijome.2017.07.006
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发表时间：
2017-09-01
期刊：
影响因子：
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通讯作者：
Tabor, Gavin R.
中科院分区：
文献类型：
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作者：
Garcia-Oliva, Miriam;Djordjevic, Slobodan;Tabor, Gavin R.
这项研究的目的是进一步了解，当潮汐涡轮机部署在水深较浅的河口时，安置在块农场中的潮汐涡轮机可能对水位产生的影响。作为为此目的提出的方法的一个应用，一个真实的案例研究，英国的索尔威湾河口，已经通过MIKE21建模。一个理想的河口模型被用来确定不同农场密度下可提取能量的趋势和对潮差的影响，并与一个完全详细的模型进行了对比。详细的模型考虑了大潮和沿海洪水的情景，以及潮汐场的不同密度和配置。对于最密集的阵列，可提取能量趋于极限，对潮差的影响变得相关，尽管它们仍然低于具有类似装机容量的潮差方案所产生的影响。已经发现，对水位的影响与农场密度的增加不是线性正比的，但它们似乎与农场消耗的能量更密切相关。并对具体地点的高、低潮位变化结果和时间序列进行了分析。当比较不同布局时，在低潮时并联阵列的变化略高。我们还可以得出结论，岸线的洪水风险水平可能会降低，而一些潮间带地区及其栖息地可能会因退潮时水位大幅上升而消失。(C) 2017 Elsevier Ltd.版权所有。
This study aims to provide further understanding about the effects that tidal turbines arranged in block farms could have over the water levels when they are deployed in estuaries with shallow bathymetry. As an application of the methodology presented for this purpose, a real case study, the Solway Firth estuary in the UK, has been modelled by means of MIKE21. An idealised model of the estuary has been used to identify the trends in extractable energy and impacts on tidal range for different farm densities and contrasted with a fully detailed model. A spring tide and a coastal flooding scenario have been considered for the detailed model as well as different densities and configurations of the tidal farms. For the densest arrays the extractable energy tends to a limit and the impacts on tidal range become relevant, although they are still lower than the ones resulting from tidal range schemes with similar installed capacities. It has been found that the effects on water levels are not linearly proportional to the increase of the farm density but they seem more closely related to the energy dissipated by the farms. The results of the changes on high and low tide levels over the estuary and time-series at specific locations have been analysed for the detailed models. When comparing between different layouts, changes during low tide levels are slightly higher for the parallel arrays. It can also be concluded that flood risk levels could be potentially reduced in the shoreline whereas some of the intertidal areas and their habitats could disappear as a consequence of significant water level rise at low tides. (C) 2017 Elsevier Ltd. All rights reserved.