Results 21 to 30 of about 5,637,270 (277)

Mapping bathymetry and shallow water benthic habitats in inland and coastal waters with Sentinel-2

open access: yesJournal of Limnology, 2023
Accurate determination of the water depth and benthic macroalgae composition in coastal and inland water bodies is important due to the high commercial and ecological value of these regions.
Laura Argus   +6 more
doaj   +1 more source

Wave Effects of the Fractional Shallow Water Equation and the Fractional Optical Fiber Equation

open access: yesFrontiers in Applied Mathematics and Statistics, 2022
The non-linear space-time fractional Estevez-Mansfield-Clarkson (EMC) equation and the non-linear space-time fractional Ablowitz-Kaup-Newell-Segur (AKNS) equation showed the motion of waves in the shallow water equation and the optical fiber equation, respectively.
Sirasrete Phoosree, Weerachai Thadee
openaire   +3 more sources

Bio-optical properties of the Brazilian Abrolhos Bank’s shallow coral-reef waters

open access: yesFrontiers in Remote Sensing, 2022
The Abrolhos Bank harbors the richest coral reef ecosystem in the South Atlantic Ocean. It exhibits unique geomorphologic structures, is localized in shallow depths, and is divided into two reef regions with an inner arc close to the coast (3–20 m depth) and an outer deeper arc (5–30 m depth).
Medeiros   +10 more
openaire   +3 more sources

Modified Green's Functions for Shallow Water Acoustic Wave Propagation [PDF]

open access: yes, 2004
This article presents an assessment of alternative forms of the Green’s function for boundary element simulations of acoustic wave propagation in shallow water. It is assumed that the problem is two-dimensional, the source of acoustic disturbance is time-
Santiago, J A F S, Wrobel, L C
core   +1 more source

Dependence of Attenuation Coefficients on Optical Condition of Shallow Water

open access: yesJournal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering), 2009
Radiative transfer of visible light in optically shallow water is an important process for remote sensing and environmental research. It has been modeled using various attenuation coefficients. Although these coefficients are apparent optical properties (AOPs) of water, which are supposed to be dependent not only on the water quality but on other ...
KANNO, Ariyo   +2 more
openaire   +2 more sources

Underwater acoustic signal acquisition based on optical interferometry in shallow water

open access: yesAUT Journal of Electrical Engineering, 2023
Here, it is investigated the results of the implementation of an interferometric optical fiber acoustic sensor based on fiber Bragg grating (FBG). It is investigated the importance of different types of interferometer configurations as Michelson or Mach-Zehnder interferometers on the signal to noise ratio.
Abniki, Aliasghar   +2 more
openaire   +2 more sources

Modelling rollers for shallow water flows [PDF]

open access: yes, 2013
Hydraulic jumps, roll waves or bores in open channel flows are often treated as singularities by hydraulicians while slowly varying shallow water flows are described by continuous solutions of the Saint-Venant equations. Richard & Gavrilyuk (J.
Thual, Olivier
core   +1 more source

Bottom Reflectance in Ocean Color Satellite Remote Sensing for Coral Reef Environments

open access: yesRemote Sensing, 2015
Most ocean color algorithms are designed for optically deep waters, where the seafloor has little or no effect on remote sensing reflectance. This can lead to inaccurate retrievals of inherent optical properties (IOPs) in optically shallow water ...
Martina Reichstetter   +5 more
doaj   +1 more source

Cloud‐native seascape mapping of Mozambique’s Quirimbas National Park with Sentinel‐2

open access: yesRemote Sensing in Ecology and Conservation, 2021
The lack of detailed spatial information on coastal resources, notably shallow water coral reefs and associated benthic habitats, impedes our ability to protect and manage them in the face of global climate change and anthropogenic impacts.
Dimitris Poursanidis   +4 more
doaj   +1 more source

Water Constituents and Water Depth Retrieval from Sentinel-2A—A First Evaluation in an Oligotrophic Lake

open access: yesRemote Sensing, 2016
Satellite remote sensing may assist in meeting the needs of lake monitoring. In this study, we aim to evaluate the potential of Sentinel-2 to assess and monitor water constituents and bottom characteristics of lakes at spatio-temporal synoptic scales. In
Katja Dörnhöfer   +4 more
doaj   +1 more source

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