DEVELOPMENT OF FLOW AND SCOUR MONITORING METHOD AROUND A RIVER PIER USING RADIO-CONTROLLED BOAT WITH ADCP AND POSITION-IDENTIFICATION SYSTEM

Abstract

 River bridge were mainly damaged by local scour around bridge piers due to flood flow. However, the flow structure and local scour around piers in flood condition remain unknown. In this study, we developed a new flow and riverbed monitoring system around a bridge pier based on a radio-controlled boat with an ADCP and a position identification method. We applied the present system to the field measurement at the Noda Bridge in the Edo River. The result indicated that the present system can efficiently identify the ADCP position and measure the riverbed height and complex three-dimensional velocity distribution around the pier.