Ambiguity resolution using dual frequency transducer for acoustic Doppler current profiler applications

2019 ◽  
Vol 146 (4) ◽  
pp. 2997-2997
Author(s):  
Sairajan Sarangapani
Keyword(s):  
Ambiguity Resolution ◽  
Acoustic Doppler Current Profiler ◽  
Dual Frequency ◽  
Frequency Transducer ◽  
Current Profiler

scholarly journals Morphodynamic change analysis of bedforms in the Lower Orinoco River, Venezuela

2018 ◽  
Vol 377 ◽  
pp. 41-50 ◽  
Author(s):  
Santiago Paul Yepez ◽  
Alain Laraque ◽  
Carlo Gualtieri ◽  
Frédéric Christophoul ◽  
Claudio Marchan ◽  
...  
Keyword(s):  
Time Series ◽  
Hydrological Regime ◽  
Acoustic Doppler Current Profiler ◽  
Dual Frequency ◽  
Mean Flow ◽  
Change Analysis ◽  
Sand Waves ◽  
Orinoco River ◽  
Current Profiler ◽  
The Right

Abstract. The Orinoco River has the third largest discharge in the world, with an annual mean flow of 37 600 m3 s−1 at its outlet to the Atlantic Ocean. Due to the presence of the Guiana Shield on the right bank, the lower reach of the Orinoco has a plan form characterized by contraction and expansion zones. Typical 1–1.5 km wide narrow reaches are followed by 7–8 km wide reaches. A complex pattern of bed aggradation and degradation processes takes place during the annual hydrological regime. A series of Acoustic Doppler Current Profiler (ADCP) transects were collected on an expansion channel in the Orinoco River, specifically over a fluvial island, representative of the lower Orinoco. In this study, temporal series of bathymetric cartography obtained by ADCP profiles combined with Differential Global Position System (DGPS) measurements (with dual-frequency), were used to recover the local displacement of bed forms in this island. The principal aims of this analysis were: (1) to understand the dynamics and evolution of sand waves and bars at this section and (2) to quantify the volume (erosion vs. accretion) of a mid-channel bar with dunes by applying DEM of Difference (DoD) maps on time series of bathymetric data. This required sampling with ADCP transects during the months of: May 2016; November 2016 and April 2017. Each bathymetric transect was measured twice, 1 day apart and on the same trajectory obtained by a GPS receptor. The spatial analysis of these ADCP transects is presented as a novel tool in the acquisition of time series of bathymetry for a relatively deep section (∼20 m) and under variable flow conditions.

Klamath River Water Quality and Acoustic Doppler Current Profiler Data from Link River Dam to Keno Dam, 2007

2008 ◽  
Author(s):  
Annett B. Sullivan ◽  
Michael L. Deas ◽  
Jessica Asbill ◽  
Julie D. Kirshtein ◽  
Kenna D. Butler ◽  
...  
Keyword(s):  
Water Quality ◽  
River Water ◽  
Acoustic Doppler Current Profiler ◽  
River Water Quality ◽  
Klamath River ◽  
Current Profiler ◽  
Profiler Data
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