Data evaluation for acoustic Doppler current profiler measurements obtained at fixed locations in a natural river

摘要: [1] Methodologies are presented to (1) evaluate the effect of acoustic Doppler current profiler (ADCP) motion on velocity measurements, (2) assess stationarity time series, and (3) ensure that a sample record is sufficient length for measurements taken with an ADCP at fixed location in natural river. occurring timescale ensemble investigated by comparing single-ping multiping obtained same under flow conditions. Large-scale over course entire measurement studied first examining set indicators determine if may have resulted measuring regions different characteristics then dividing into segments representing potentially comparison. If boat significant, edited accordingly. Stationarity assessed using statistical trend tests guidance provided selecting parameters based instrument physics Mean streamwise spanwise profiles can be calculated after confirming reliability measurement. A criteria appropriateness assumption law wall profiles. The methodology demonstrated 67 fixed-vessel two sites lower Roanoke River discharges. results indicate appropriate procedure was used securing channel records were provide both accurate mean quantities velocity.