Výsledky vyhledávání - "Yogesh C. Agrawal"

Autor: Emlyn John Davies, Alejandro J. Souza, Yogesh C. Agrawal, W. Alex M. Nimmo-Smith

Publikováno v: Marine Geology. :117-122

Particles in the marine environment vary in size from sub-micron colloids to flocculated aggregates of the order of millimetres. The LISST-100 (laser in-situ scattering and transmissometer) range of instruments (Sequoia Scientific Inc.) determine the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04cc06e38018324aeda1c868c7c45c2a
https://doi.org/10.1016/j.margeo.2012.03.006

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Time-averaged near-bed suspended sediment concentrations under waves and currents: Comparison of measured and model estimates

Autor: Nicholas J. Nidzieko, David A. Cacchione, Yogesh C. Agrawal, Peter D. Thorne

Publikováno v: Continental Shelf Research. 28:470-484

Profiles of suspended sediment concentration and velocity were measured over a 15-day period at a near-shore site off Santa Cruz, CA in Monterey Bay. The concentration and velocity data were collected with an Acoustic Backscattering System (ABS) and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c286a7099d6508cc28083ffa44257ffe
https://doi.org/10.1016/j.csr.2007.10.006

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Particle Characterization and Settling Velocities for a Water Supply Reservoir during a Turbidity Event

Autor: Feng Peng, Yogesh C. Agrawal, David G. Smith, Steven W. Effler, MaryGail Perkins, Donald C. Pierson

Publikováno v: Journal of Environmental Engineering. 133:800-808

Characterization of the particle population for a location in a water supply reservoir, Kensico Reservoir, N.Y., is documented for a high turbidity event, from its onset, through alum treatment and its waning. Supporting in situ measurements included

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::93a4a55d52d9383f2cfd67ae09d6a370
https://doi.org/10.1061/(asce)0733-9372(2007)133:8(800)

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A Comparison of Near-Bed Acoustic Backscatter and Laser Diffraction Measurements of Suspended Sediments

Autor: Peter D. Thorne, David A. Cacchione, Yogesh C. Agrawal

Publikováno v: IEEE Journal of Oceanic Engineering. 32:225-235

As part of the U.S. Office of Naval Research (ONR, Arlington, VA) mine burial program, an experiment was conducted off the pier at Santa Cruz, CA, to measure the near-bed suspended sediment reference concentration under waves and currents. Two tripod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2407aa1ef42ab0674044f75f11ef4bd8
https://doi.org/10.1109/joe.2007.890978

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The optical volume scattering function: Temporal and vertical variability in the water column off the New Jersey coast

Autor: Yogesh C. Agrawal

Publikováno v: Limnology and Oceanography. 50:1787-1794

I present optical data collected offshore of the New Jersey coast at the Long Term Ecological Observatory LEO15 during the summer of 2001. The data were collected by using a LISST-100 instrument, which measured the volume scattering function (VSF) ov

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c5bf242e4704808e23dbd35232bc830f
https://doi.org/10.4319/lo.2005.50.6.1787

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Measuring sediments: Backscatter optics, laser diffraction, acoustics, and combined optics and acoustics

Autor: Yogesh C. Agrawal

Publikováno v: The Journal of the Acoustical Society of America. 141:3670-3670

Over the last 3-plus decades, point measurements of sediment concentrations in water have mostly been made using optical backscatter. Physics tells us that this signal correlates with particle area concentration so that while measuring volume concent

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c0f2b90f0e85c82903e2c715bf90e24c
https://doi.org/10.1121/1.4987959

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Determining suspended sediment particle size information from acoustical and optical backscatter measurements

Autor: James F. Lynch, Christopher R. Sherwood, Yogesh C. Agrawal, James D. Irish

Publikováno v: Continental Shelf Research. 14:1139-1165

During the winter of 1990–1991 an Acoustic BackScatter System (ABSS), five Optical Backscatterance Sensors (OBSs) and a Laser In Situ Settling Tube (LISST) were deployed in 90 m of water off the California coast for 3 months as part of the Sediment

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::024f2fdbe65d0bd9dd04c2dffde0b370
https://doi.org/10.1016/0278-4343(94)90032-9

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Directional pedestal-free laser Doppler velocimetry without frequency biasing. Part 1

Autor: Yogesh C. Agrawal, J. R. McCullough

Publikováno v: Applied optics. 20(9)

The spatial structure of the optical field on the detector of a laser Doppler velocimeter is examined. It is shown that for sufficiently small scatterers, the optical field is a traveling wave of shape determined by the detector optics alone. The dir

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a31946e1394515490c58c8b07a6fe255
https://pubmed.ncbi.nlm.nih.gov/20309349

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Reference Concentration for Shelf Sediment Transport Models

Autor: Yogesh C Agrawal

My long-term goals are to advance understanding of sediment transport processes. In this context, the long-term goal of this project is to advance understanding of the reference concentration, i.e. concentration of suspended sediments at a small dist

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14fccab107568cc6f39ecce29fe048f6
https://doi.org/10.21236/ada627799

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