Author(s): Mohamad Basel Alsawaf; Yashuharu Watanabe; Akiyoshi Sasaki; Kazuya Inoue; Satoshi Kusano

Linked Author(s): MOHAMAD BASEL ALSAWAF

Keywords: Streamflow; Underwater Acoustic Tomography; Sediment

Abstract: transport even during mild rainfall events, hindering accurate and continuous measurements of streamflow using acoustic-based approaches. Underwater acoustic tomography methods can provide accurate and continuous measurements of stream velocity and river discharge. Nonetheless, one of the main drawbacks of acoustic-based approaches is the attenuation of sound waves due to high sediment concentrations transported along river channels during rainfall events. In this regard, this study aims to investigate the performance of the Fluvial Acoustic Tomography (FAT) system in providing accurate and continuous streamflow measurements in a river channel that carries high quantities of sediment matter triggered by rainy conditions. To overcome this challenge, acoustic signal transmission was performed using a hybrid configuration that contains double frequencies. As a result, the streamflow observed by the FAT system using this configuration was compared to another independent discharge record. The comparison showed a good to very good agreement between both records. In general, as this configuration style is new, some limitations appeared and should be improved to provide more flexible utilization and precise performance.

DOI: https://doi.org/10.64697/978-90-835589-7-4_41WC-P1952-cd

Year: 2025