Abstract This study develops and evaluates a sensing system capable of measuring stemflow at high temporal resolutions. Leveraging affordable hobbyist grade electronics has allowed for the development of a system which is low-cost, easy to reproduce and adaptable. Eschewing classic stemflow measurement techniques, the system demonstrated herein utilizes a sensing payload which includes a wetness sensor and ultrasonic rangefinder. Combined, these sensors are capable of determining precise stemflow initiation and cessation times as well as capturing high temporal resolution stemflow volume measurements at 10 s intervals. A case study focusing on stemflow data collected by the sensing system from an isolated green ash (Fraxinus pennsylvanica Marshall) during a May 2016 rainfall event in Kamloops, British Columbia is used to evaluate the performance of the sensing system, demonstrating the accuracy of the collected data and the potential research questions that can be addressed by large scale deployment of the sensor system.

中文翻译：

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低成本、高分辨率的茎流传感

摘要 本研究开发并评估了一种能够以高时间分辨率测量茎流的传感系统。利用负担得起的业余爱好者级电子产品，可以开发出低成本、易于复制和适应性强的系统。避开经典的茎流测量技术，这里展示的系统利用了一个传感有效载荷，其中包括湿度传感器和超声波测距仪。结合起来，这些传感器能够确定精确的茎流开始和停止时间，并以 10 秒的间隔捕获高时间分辨率的茎流体积测量值。一个案例研究侧重于传感系统在 2016 年 5 月坎卢普斯降雨事件期间从孤立的绿灰 (Fraxinus pennsylvanica Marshall) 收集的茎流数据，