Using Temperature to Infer Real-time Changes in Beach Bathymetry - Fiber Optics in the Nearshore

We present a new method for using temperature to infer bathymetric change of an artificial beach placed in the O.H. Hinsdale Wave Research Laboratory Large Wave Flume at Oregon State University. The temperature latency technique compares recorded temperature measured within the sediment with modeled temperatures expected to result from surface water temperature changes through time. Because surface-driven temperature changes are attenuated and lagged in time with deeper burial, we can estimate depth of burial by examining the time series of temperatures measured within the sediment relative to surface temperatures. Temperatures are recorded at more than 900 cross-shore locations across two depths using a fiber optic distributed temperature system (DTS) and at 2 cross-shore locations at two depths using stacked point thermocouples for DTS verification.

Data will be available in October 2021 by request from [e-mail].

本研究提出了一种新的方法，通过利用温度来推断置于俄勒冈州立大学O.H. Hinsdale波浪研究实验室大型波浪水槽中的人工海滩的水深变化。该温度滞后期技术通过对比记录的沉积物内温度与模型预测的温度（预期由水面水温随时间变化而产生的温度）进行对比。鉴于由表面驱动的温度变化随着深度增加而衰减并滞后，我们可以通过分析沉积物内测量的温度时间序列相对于表面温度的变化来估算埋藏深度。使用光纤分布式温度系统（DTS）在超过900个沿岸位置的两个深度处记录温度，并使用堆叠点热电偶在两个深度处的两个沿岸位置进行DTS验证。数据将于2021年10月通过电子邮件[e-mail]的请求方式提供。