Results 91 to 100 of about 28,768 (293)

An X-Band Radar System for Bathymetry and Wave Field Analysis in a Harbour Area

Sensors, 2015
Marine X-band radar based systems are well tested to provide information about sea state and bathymetry. It is also well known that complex geometries and non-uniform bathymetries provide a much bigger challenge than offshore scenarios.
Giovanni Ludeno, Ferdinando Reale, Fabio Dentale, Eugenio Pugliese Carratelli, Antonio Natale, Francesco Soldovieri, Francesco Serafino   +6 more
doaj   +1 more source

Monitoring Near-Shore Bathymetry Using a Multi-Image Satellite-Derived Bathymetry Approach [PDF]

, 2015
Two advanced survey systems for hydrographic surveying are multi-beam echsounder (MBES) and airborne lidar bathymetry (ALB). Compared to more traditional hydrographic surveying methods, these systems provide both highly accurate and a dense coverage of ...
Alexander, Lee, Freire, Ricardo, Lippmann, Thomas C., Madore, Brian, Parrish, Christopher, Pe\u27eri, Shachak, Rzhanov, Yuri   +6 more
core   +1 more source

Lessons Learnt From Long‐Term Monitoring of River Restoration in an English Chalk Stream

River Research and Applications, EarlyView.
ABSTRACT River restoration can be difficult to evaluate due to insufficient monitoring over timescales too short to adequately capture physical and ecological response. To better understand restoration outcomes, this study quantified changes in physical habitat (depth, velocity, substrate composition) and macroinvertebrates at two restoration projects ...
Lewis A. Dolman, Andrew S. Vowles, Paul S. Kemp   +2 more
wiley   +1 more source

A Novel Method for Estimating Wave Energy Converter Performance in Variable Bathymetry Regions and Applications

Energies, 2018
A numerical model is presented for the estimation of Wave Energy Converter (WEC) performance in variable bathymetry regions, taking into account the interaction of the floating units with the bottom topography.
Kostas Belibassakis, Markos Bonovas, Eugen Rusu   +2 more
doaj   +1 more source

Meander‐Bend Erosion Dynamics Along a Gravel‐Bed River: Insights From Short‐Term UAV Monitoring

River Research and Applications, EarlyView.
ABSTRACT Riverbank erosion is a natural process in meandering rivers that contributes to sediment supply and geomorphic diversity, yet it can threaten infrastructure and human activities within the floodplain. Recently, many studies have used high‐resolution remote sensing technologies to measure bank erosion, but they often focus on technical aspects ...
Katarina Pavlek, Mateo Gašparović, Tomáš Galia   +2 more
wiley   +1 more source

On the contribution of the horizontal sea-bed displacements into the tsunami generation process [PDF]

, 2012
The main reason for the generation of tsunamis is the deformation of the bottom of the ocean caused by an underwater earthquake. Usually, only the vertical bottom motion is taken into account while the horizontal co-seismic displacements are neglected in
Ammon, Ammon, Baba, Bardet, Bassin, Beisel, Bilham, Clamond, Coifman, Craig, Craig, Das, Delis, Denys Dutykh, Dias, Dias, Dimitrios Mitsotakis, Dormand, Dutykh, Dutykh, Dutykh, Dutykh, Dutykh, Dutykh, Fritz, Fructus, Fructus, Fuhrman, Fujii, Geist, Geist, Guyenne, Hammack, Harbitz, Ichinose, Ichinose, Imamura, Ji, Johnson, Kajiura, Kajiura, Kanamori, Kanamori, Kanamori, Kervella, Kim, Lamb, Lander, Lay, Lay, Leonid B. Chubarov, Løvholt, Mansinha, Mansinha, McCloskey, Mei, Mindlin, Mitsotakis, Ohmachi, Okada, Okada, Okal, Okal, Piatanesi, Pires, Press, Rabinovich, Rhie, Saito, Satake, Song, Song, Steketee, Stevenson, Stoker, Synolakis, Tanioka, Todorovska, Todorovska, Tsuji, Velichko, Venkataraman, Vennard, Volterra, Walker, Wang, Ward, Whitham, Yagi, Yuri I. Shokin, Zakharov   +90 more
core   +3 more sources

Fundamental Hydraulic Geometry Relations as an Accessible Tool for Identifying Channel Instability Over National Scales

River Research and Applications, EarlyView.
ABSTRACT The geometry of alluvial river channels can give insight into their stability, which can inform predictions of morphological change, flood risk and ecological degradation. Fundamental hydraulic geometry relations can be used to estimate the equilibrium dimensions of stable river channels by evaluating the balance between the erodibility of bed
David Whitfield, Edwin Baynes, Stephen Rice, Richard Jeffries   +3 more
wiley   +1 more source

MINS: Tightly coupled MultiBeam EchoSounder Inertial Navigation System for 3D bathymetric underwater inspection

Journal of Ocean Engineering and Science
By fusing a MultiBeam EchoSounder (MBES) with an Inertial Measurement Unit (IMU) and a Doppler Velocity Log (DVL) we present MINS: a graph-based, tightly coupled, and featureless MBES-Inertial Navigation System that enables accurate and real-time robot ...
Pau Vial, Roger Pi, Narcís Palomeras, Marc Carreras   +3 more
doaj   +1 more source

The role of Internal Solitary Waves on deep-water sedimentary processes. The case of up-slope migrating sediment waves off the Messina Strait [PDF]

, 2016
Subaqueous, asymmetric sand waves are typically observed in marine channel/canyon systems, tidal environments, and continental slopes exposed to strong currents, where they are formed by current shear resulting from a dominant unidirectional flow ...
Casalbore, Daniele, Chiocci, Francesco, Droghei, Riccardo, Falcini, Federico, Martorelli, Eleonora, Mosetti, Renzo, Salusti, Ettore, Sannino, Gianmaria, Santoleri, Rosalia   +8 more
core   +2 more sources

Incorporating environmental DNA metabarcoding for improved benthic biodiversity and habitat mapping

Remote Sensing in Ecology and Conservation, EarlyView.
Seafloor imagery is commonly used to collect information about the distribution of benthic organisms in order to generate habitat and biodiversity maps. Recent advances in genomics (e.g., environmental DNA; eDNA) show potential to complement video surveys for habitat mapping, but there have been few examples testing this.
Rylan J. Command, Shreya Nemani, Benjamin Misiuk, Mehrdad Hajibabaei, Nicole Fahner, Emily Porter, Greg Singer, Beverly McClenaghan, Katleen Robert   +8 more
wiley   +1 more source