StreamScope: Fixed-mount laser scanning instrumentation for remote stream gauging in shallow rivers with frequently changing geomorphologies

A novel approach has been developed to facilitate streaming gauging in shallow rivers with frequently changing geomorphologies. This effort, developed in partnership with the United States Geological Survey (USGS), aims to ultimately generate more accurate, real-time discharge estimates at previously ungauged locations in remote areas.

This presentation will introduce the StreamScope, designed for automated bathymetry retrievals. It is a low-power laser scanning instrument that uses a Class II 620 nm laser and an ultrasonic sensor to remotely measure cross-sectional geometry and generate real-time stage-area ratings. By utilizing onboard automation and clustering algorithms, StreamScope can accurately measure channel bathymetry using multiple angles, determine stream width and stage, providing data to enable real-time discharge estimates from noncontact sensors. Results from laboratory experiments will be presented to evaluate the laser’s efficacy under different solar radiation conditions, varying turbidity levels at different water depths, different bottom substrates, and at varying heights above the water’s surface. Notably, the experiments revealed that the laser's distance retrievals may serve as a proxy for turbidity, offering a potential new method for assessing water clarity in real-time.