Abstract
The acoustic Doppler current profiler (ADCP) has become an important tool in the study of river processes. When measurements are obtained at a fixed location within the river channel, time-averaged velocity profiles can be calculated. These profiles have the potential to quantify flow properties such as secondary currents and boundary shear stress. Velocity profiles from ADCP measurements obtained on the lower Roanoke River in the USA are used to estimate local mean boundary shear stress. The procedure combines the well known log-law with visually establishing the region within the flow depth where this law is valid. Additionally, methods are presented to (i) determine if movement of the ADCP adversely affects the measured velocity profile, (ii) test whether the recorded data is stationary, and (iii) calculate the depth-averaged velocity.
| Original language | American English |
|---|---|
| Title of host publication | Proceedings of the International Fluvial Hydraulics River Flow |
| State | Published - Sep 8 2010 |
Keywords
- ADCP
- Local boundary
- Shear stress
- Velocity
- Velocity profiles
DC Disciplines
- Civil Engineering
- Construction Engineering and Management