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Evaluation of a Runoff Monitoring Methodology for Rangelands: UBeTubes
Rangeland Ecology & Management ( IF 2.3 ) Pub Date : 2021-06-26 , DOI: 10.1016/j.rama.2021.05.003
Jeremy W. Schallner , Justin C. Johnson , C. Jason Williams , Amy C. Ganguli

Rangeland degradation is a global concern that is exacerbated by soil loss through water erosion. A deeper understanding of rainfall and runoff dynamics can assist in the development of sustainable management strategies. Current methods to measure surface runoff (e.g., natural runoff plots, rainfall simulation and overland flow experiments, modeling approaches) have many advantages but can be prohibitively expensive, may require considerable maintenance, and/or result in significant disturbance during installation. To address these limitations, we assessed a relatively new and underused method for monitoring runoff, the Upwelling Bernoulli Tube (UBeTube). The UBeTube is a low-cost, passive runoff monitoring method that estimates runoff from the height of water flowing out of a slot machined in the side of a vertical tube. In this study, we evaluated the UBeTube across a range of flow rates with three specific objectives: 1) calibrate the UBeTube measurements using clean water, 2) assess the impacts from varying sediment loads on UBeTube measurement accuracy, and 3) evaluate accuracy under conditions similar to those on undisturbed and disturbed rangelands. We found that properly calibrated UBeTubes could be a relatively accurate runoff monitoring method on rangelands (mean percent error = 7.7% clean water calibration, 34.1% sediment loading, 35.2% undisturbed overland flow, 17.7% disturbed overland flow). UBeTubes provide an alternative method to monitor runoff on rangelands that can augment current methods by providing near real-time measurements of runoff generated during natural precipitation events. Easily and rapidly deployed across the landscape, UBeTubes could allow for the relative measurement of spatially variable hydrologic dynamics and serve as another source of information for management decision-making processes and the creation of sustainable strategies for rangeland development.



中文翻译:

牧场径流监测方法评估:UBeTubes

牧场退化是一个全球性的问题,水蚀造成的土壤流失加剧了这一问题。更深入地了解降雨和径流动态有助于制定可持续管理战略。当前测量地表径流的方法(例如,自然径流图、降雨模拟和地表流实验、建模方法)具有许多优点,但可能非常昂贵,可能需要大量维护,和/或在安装过程中导致显着干扰。为了解决这些限制,我们评估了一种相对较新且未充分利用的监测径流的方法,即上升流伯努利管 (UBeTube)。UBeTube 是一种低成本的被动径流监测方法,可根据从垂直管侧面加工的槽中流出的水的高度估算径流。在这项研究中,我们评估了 UBeTube 在一系列流速下的三个特定目标:1) 使用清洁水校准 UBeTube 测量值,2) 评估不同沉积物负载对 UBeTube 测量精度的影响,以及 3) 在与未受干扰和受干扰的牧场。我们发现正确校准的 UBeTubes 可能是牧场上相对准确的径流监测方法(平均百分比误差 = 7.7% 的清洁水校准,34.1% 的沉积物负载,35.2% 的未受干扰的地表水流,17.7% 的被干扰的地表水流)。UBeTubes 提供了一种监测牧场径流的替代方法,该方法可以通过提供对自然降水事件期间产生的径流的近实时测量来增强当前方法。在整个景观中轻松快速地部署,

更新日期:2021-06-28
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