Estimation of high-resolution sediment concentration profiles in bottom boundary layer using pulse-coherent acoustic Doppler current profilers

Ha, Ho Kyung; Maa, Jerome P.‐Y.; Park, K.; Kim, Y.H.

doi:10.1016/j.margeo.2010.11.002

Cited by 73 publications

(35 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model described by Thorne and Hanes (2002) and Thorne et al (2011) for marine sediment was chosen for use in this study because it is simpler to implement than some other, similar formulations (Carlson, 2002;Furlan et al, 2012;Ha et al, 2011) and has a firm theoretical basis (Hay, 1991;Kyt€ omaa, 1995;Richards et al, 1996). As a result, it has previously been employed by a number of groups (Admiraal and Garc ıa, 2000;Hunter et al, 2012a;Hurther et al, 2011).…”

Section: B a Model Of Acoustic Backscatter Strengthmentioning

confidence: 99%

Measuring particle concentration in multiphase pipe flow using acoustic backscatter: Generalization of the dual-frequency inversion method

Rice

Fairweather

Hunter

et al. 2014

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

A technique that is an extension of an earlier approach for marine sediments is presented for determining the acoustic attenuation and backscattering coefficients of suspensions of particles of arbitrary materials of general engineering interest. It is necessary to know these coefficients (published values of which exist for quartz sand only) in order to implement an ultrasonic dual-frequency inversion method, in which the backscattered signals received by transducers operating at two frequencies in the megahertz range are used to determine the concentration profile in suspensions of solid particles in a carrier fluid. To demonstrate the application of this dual-frequency method to engineering flows, particle concentration profiles are calculated in turbulent, horizontal pipe flow. The observed trends in the measured attenuation and backscatter coefficients, which are compared to estimates based on the available quartz sand data, and the resulting concentration profiles, demonstrate that this method has potential for measuring the settling and segregation behavior of real suspensions and slurries in a range of applications, such as the nuclear and minerals processing industries, and is able to distinguish between homogeneous, heterogeneous, and bed-forming flow regimes.

show abstract

Section: B a Model Of Acoustic Backscatter Strengthmentioning

confidence: 99%

Measuring particle concentration in multiphase pipe flow using acoustic backscatter: Generalization of the dual-frequency inversion method

Rice

Fairweather

Hunter

et al. 2014

The Journal of the Acoustical Society of America

View full text Add to dashboard Cite

show abstract

“…With the SPM sam measured at several levels corresponding to ADCP's bins, calibration coefficients were determined by linear regression, which were later used to calculate ADCP-derived SPM concentration (SPM adcp ) (Kim and Voulgaris 2003;Traykovski et al 2007). The detail algorithm for acoustic signal converting processes to the SPM is given in Ha et al (2011) and Ha and Park (2012).…”

Section: Spm Analysismentioning

confidence: 99%

Under-ice measurements of suspended particulate matters using ADCP and LISST-Holo

Kim

Lee

et al. 2015

Ocean Sci. J.

View full text Add to dashboard Cite

 Using a mooring package comprising an acoustic Doppler current profiler (ADCP) and holographic imaging system, a 1-day ice camp study was performed under the Arctic sea ice in the northern Chukchi Plateau to estimate vertical and temporal variations in total suspended particulate matter (SPM). In early August, the SPM in the upper mixed layer (~15 m and above) under sea ice reached up to about 100 mg l -1 even under the offshore regime. Results of both holographic and microscopic analyses showed that dominant constituents of this increased SPM were biogenic rather than lithogenic materials. Due to the highest melt and break-up rates of sea ice during the summertime, the export of particulate materials and ice algal communities embedded in the sea ice might significantly contribute to the increase in SPM. This study suggests that the combined effects of the increase in ice algal production and the decrease in ice and snow cover and multi-year sea ice extent could create favorable conditions for enhancing the concentration and flux of SPM during the summertime.

show abstract

“…Anecdotal evidence from prior studies supports this hypothesis. Sediment resuspension and intense vertical mixing have been observed during several storm events in CHB and MOB [81][82][83][84][85][86]. Akulichev and Bulanov [55] found that bubbles reached the seafloor during a storm in the shallow (10 m) Sea of Japan and Evans et al [87] showed that the elevated CO2 in the Columbia River Estuary, USA was almost entirely ventilated during a major storm event.…”

Section: Ambient Water Conditionsmentioning

confidence: 99%

Bubble Clouds in Coastal Waters and Their Role in Air-Water Gas Exchange of CO2

Crosswell

2015

JMSE

View full text Add to dashboard Cite

Abstract:Bubbles generated by breaking waves can drive significant gas exchange between the ocean and atmosphere, but the role of bubble-mediated gas transfer in estuaries is unknown. Here, backscatter data from 41 acoustic Doppler current profiler stations was analyzed to assess subsurface bubble distributions in nine estuaries along the U.S. East and Gulf Coast. Wind speed, wind direction, and current velocity were the dominant controls on bubble entrainment, but the relative importance of these physical drivers depended on local geomorphology. Bubble entrainment in high-current or shallow, long-fetch estuaries began at wind speeds <5 m s −1. In deep or fetch-limited estuaries, bubble entrainment was less frequent and generally began at higher wind speeds. Data observed during several storms suggests that episodic bubble-driven gas exchange may be an important component of annual CO2 fluxes in large, shallow estuaries but would be less significant in other coastal systems.

show abstract

Estimation of high-resolution sediment concentration profiles in bottom boundary layer using pulse-coherent acoustic Doppler current profilers

Cited by 73 publications

References 47 publications

Measuring particle concentration in multiphase pipe flow using acoustic backscatter: Generalization of the dual-frequency inversion method

Measuring particle concentration in multiphase pipe flow using acoustic backscatter: Generalization of the dual-frequency inversion method

Under-ice measurements of suspended particulate matters using ADCP and LISST-Holo

Bubble Clouds in Coastal Waters and Their Role in Air-Water Gas Exchange of CO2

Contact Info

Product

Resources

About