Bedload Sediment Transport Estimation in Sand-Bed Rivers Comparing Traditional Methods and Surrogate Technologies

Bedload sediment transport in rivers can cause impacts, such as bed erosion/deposition, sandbank formation and changes flow capacity. sampling techniques have limitations related to spatial temporal resolution. These constraints are more relevant with dunes high transport. This paper presents a comparison between bedload rates estimated direct indirect methods river sand dunes. The case study area is stretch of the Taquari River, Brazil. Surveys were carried out on three consecutive days, during flood season. A SonTek M9-ADCP HydroSurveyor capabilities activated was used simultaneously measure bathymetry water velocities throughout reach, also perform moving-bed tests at six verticals along predefined cross-section. mechanical trap (Helley–Smith) collect samples same time positions where performed. Sediment calculated compared following different approaches: (1) ADCP-BT (Bottom Tracking); (2) modified ISSDOTv2 method (dune tracking); (3) HelleySmith trap; (4) five empirical equations. results showed good agreement methodologies, indicating potential using ADCPs for hydro sedimentological studies due advantages integrating bathymetry, velocity data.