Cai J. T. Ladd, Alejandra G. Vovides, Marie-Christin Wimmler, Christian Schwarz, Thorsten Balke
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引用次数: 0
摘要
潮间带栖息地受潮汐和海浪的影响,在浅水区很难对其进行监测。为了应对这一挑战,最近开发了 "迷你浮标 "和相关的开源应用程序,用于同时对潮汐淹没和流速进行低成本和长期监测。迷你浮标是一个安装在底部的浮标,通过测量倾斜度来推断近床水动力。在此,我们将介绍迷你浮标和应用程序的重大更新。我们校准了两种新的迷你浮标设计:"Pendant "和 "B4+","Pendant "只需极少的组装即可部署,"B4+"还可以测量波浪轨道速度。与在现场部署的行业标准水位和流速传感器进行比较后发现,每种新设计都能有效探测潮汐淹没(总体精度为 86-97%)和流速(R2 = 0.73-0.91;精度为 ± 0.14-0.22 m s-1;探测极限在 0.02 至 0.8 m s-1 之间)。B4+ 可以合理地测量波的轨道速度(R2 = 0.56;精度为 ± 0.18 m s-1;探测限在 0.02 和 0.8 m s-1 之间)。降低采样率以延长勘测时间并没有明显降低速度测量的精度,但最初的迷你浮标设计除外(从 1 到 10 s 采样,不确定性增加了 ± 2.11 m s-1)。更新后的应用程序增强了用户体验,可接受来自任何迷你浮标设计的数据,适合在任何潮汐环境中通用,并提供多种选择来了解和对比当地的水动力机制。迷你浮标设计和应用程序的改进为生态系统恢复和洪水风险管理等目的的水动力监测提供了更多机会。
Monitoring tides, currents, and waves along coastal habitats using the Mini Buoy
Intertidal habitats are shaped by the actions of tides and waves which are difficult to monitor in shallow water. To address this challenge, the “Mini Buoy” and associated open-source App were recently developed for the low-cost and long-term monitoring of tidal inundation and current velocities simultaneously. The Mini Buoy is a bottom-mounted float that measures tilt to infer near-bed hydrodynamics. Here, we present significant updates to the Mini Buoy and App. Two new Mini Buoy designs were calibrated: the “Pendant” that requires minimal assembly for deployment, and the “B4+” that can also measure wave orbital velocity. Comparisons against industry-standard water-level and velocity sensors deployed in the field showed that each new design was effective at detecting tidal inundation (overall accuracy of 86–97%) and current velocities (R2 = 0.73–0.91; accuracies of ± 0.14–0.22 m s−1; detection limits between 0.02 and 0.8 m s−1). The B4+ could reasonably measure wave orbital velocities (R2 = 0.56; accuracies of ± 0.18 m s−1; detection limits between 0.02 and 0.8 m s−1). Reducing the sampling rate to prolong survey durations did not markedly reduce the precision of velocity measurements, except in the original Mini Buoy design (uncertainty increased by ± 2.11 m s−1 from 1 to 10 s sampling). The updated App enhances user experience, accepts data from any Mini Buoy design, is suitable for generic use across any tidal setting, and presents multiple options to understand and contrast local hydrodynamic regimes. Improvements to the Mini Buoy designs and App offer greater opportunities in monitoring hydrodynamics for purposes including ecosystem restoration and flood risk management.
期刊介绍:
Limnology and Oceanography: Methods (ISSN 1541-5856) is a companion to ASLO''s top-rated journal Limnology and Oceanography, and articles are held to the same high standards. In order to provide the most rapid publication consistent with high standards, Limnology and Oceanography: Methods appears in electronic format only, and the entire submission and review system is online. Articles are posted as soon as they are accepted and formatted for publication.
Limnology and Oceanography: Methods will consider manuscripts whose primary focus is methodological, and that deal with problems in the aquatic sciences. Manuscripts may present new measurement equipment, techniques for analyzing observations or samples, methods for understanding and interpreting information, analyses of metadata to examine the effectiveness of approaches, invited and contributed reviews and syntheses, and techniques for communicating and teaching in the aquatic sciences.