Abstract Han Y, Smithheart JW, Smyth RL, Aziz TN, Obenour CR. 2019. Assessing vertical diffusion and cyanobacteria bloom potential in a shallow eutrophic reservoir. Lake Reserv Manage. 36:169–185. Harmful blooms of cyanobacteria are an increasing threat to many lakes and reservoirs. While vertical mixing has been shown to be an important control on cyanobacteria dominance in some lakes, the relevance of mixing in relatively shallow turbid systems remains unclear. To explore mixing and its impact on cyanobacteria bloom potential, we leveraged data from a multiyear field campaign of a central North Carolina reservoir where artificial circulators were installed to (1) implement a parsimonious one-dimensional (1D) turbulent diffusion model with an artificial circulation term, (2) introduce a novel multi-objective calibration approach considering both water column temperature and stability, and (3) explore how mixing affects cyanobacteria bloom potential through changes in cyanobacteria light exposure relative to other algal taxa. Our multi-objective calibration approach is shown to realistically simulate both water temperature (R2 = 0.99) and water column stability (R2 = 0.62) throughout the year. Analysis of artificial mixing demonstrates the relative insignificance of the circulator deployment in our study area and suggests that at least eight times the implemented circulation rate would be required to substantially reduce the ability of buoyant cyanobacteria to outcompete other algal taxa for light. Overall, this study demonstrates an efficient and systematic approach for characterizing vertical mixing in lakes and reservoirs, which can be used to assess the viability of artificial circulation prior to deployment.

中文翻译：

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浅层富营养化水库垂直扩散和蓝藻水华潜力评估

摘要 Han Y、Smithheart JW、Smyth RL、Aziz TN、Obenour CR。2019. 评估浅层富营养化水库中的垂直扩散和蓝藻水华潜力。湖泊保护区管理。36:169-185。蓝藻的有害大量繁殖对许多湖泊和水库构成越来越大的威胁。虽然垂直混合已被证明是对某些湖泊中蓝藻优势的重要控制，但在相对较浅的混浊系统中混合的相关性仍不清楚。为了探索混合及其对蓝藻水华潜力的影响，我们利用北卡罗来纳州中部水库多年现场活动的数据，其中安装了人工循环器，以 (1) 使用人工循环实施简约的一维 (1D) 湍流扩散模型学期，(2) 引入一种新的多目标校准方法，同时考虑水柱温度和稳定性，以及 (3) 探索混合如何通过相对于其他藻类分类群的蓝藻光照变化来影响蓝藻水华潜力。我们的多目标校准方法可以真实地模拟全年的水温 (R2 = 0.99) 和水柱稳定性 (R2 = 0.62)。人工混合的分析表明，在我们的研究区域部署循环器的相对微不足道，并表明至少需要 8 倍的实施循环率才能显着降低浮力蓝藻胜过其他藻类类群对光的竞争能力。全面的，