Results 81 to 90 of about 29,659 (309)

Linear System Identification and Control of a Low‐Cost High‐Performance Omnidirectional Marine Surface Vehicle for Swarming Applications

Journal of Field Robotics, EarlyView.
ABSTRACT Marine operations traditionally rely on human intervention, a costly and disruptive method. Autonomous surface vehicles (ASVs) offer a powerful alternative, capable of operating autonomously, for extended periods, and with various sensors for various missions.
Ayman El Qemmah, Gianni Cario, Alessandro Casavola, Marco Lupia, Francesco Tedesco   +4 more
wiley   +1 more source

Bathymetry beneath ice shelves of western Dronning Maud Land, East Antarctica

, 2020
The lack of consistent and reliable estimates of the bathymetry beneath the ice shelves of western Dronning Maud Land is addressed by inverting airborne gravity data to model the underlying bathymetry.
Eisermann, Hannes, Ruppel, Antonia, Smith, Emma Clare, Jokat, Wilfried, Eagles, Graeme   +4 more
core   +1 more source

Strategies for Assessing Post‐Wildfire Geomorphic Resilience in Semiarid Rivers

River Research and Applications, EarlyView.
ABSTRACT We review and summarize diverse components of a catchment that can be monitored after wildfire to assess the geomorphic resilience of the river corridor in semiarid regions. We distinguish upland portions of river catchments from river corridors.
Ellen Wohl, Shayla Triantafillou, Alex Thornton‐Dunwoody, Connor Mertz, Katie Larkin, William Keenan, Steven Griffin, Dylan Davis, Lindsey Blehm   +8 more
wiley   +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

IODP Expedition 361 Bathymetry

, 2020
Operational bathymetry data were measured using 3.5 kHz and/or 12 kHz echo sounders. Raw data are available in ODEC/CSV and SEGY formats, and depth-corrected bathymetry is presented in SEGY format.
Hall, I.R., Caley, T., Yamane, M., Crespin, J.G., Simon, M.H., Lathika, N., Koutsodendris, A., Berke, M.A., Kubota, K., Han, X., Gruetzner, J., Hemming, S.R., Pereira dos Santos, T., Zhang, H., Coenen, J.J., Franzese, A.M., Hines, S.K.V., Just, J., Robinson, R., Tangunan, D., Jimenez-Espejo, F.J., Barker, S., Cartagena-Sierra, A., Charles, C.D., Rolinson, J.M., van der Lubbe, J.J.L., LeVay, L.J., Norris, R.D., Brentegani, L.   +28 more
core   +1 more source

Assessment of empirical algorithms for bathymetry extraction using Sentinel-2 data [PDF]

, 2018
Bathymetry estimated from optical satellite imagery has been increasingly implemented as an alternative to traditional bathymetric survey techniques. The availability of new sensors such as Sentinel-2 with improved spatial and temporal resolution, in ...
McCarthy, T., Cahalane, Conor, Monteys, Xavier, Hedley, J., McCarthy, Tim, Monteys, X., Cahalane, C., Hedley, John, Harris, P., Harris, Paul, Casal, G., Casal, Gema   +11 more
core   +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

Galveston Bay oyster maps. Texas City to Eagle Point; bathymetry and reefs

, 1992
1 map; 61 x 84 cmThe Galveston Bay Oyster Map series is a collection of maps corresponding to the report: The Status of Oyster Reefs in Galveston Bay, Texas by Eric N. Powell, Jungguen Song, and Matthew Ellis (refer to Accession #7014).
Simons, J.D., Powell, E.N., Lawrie, S., Song, J., Ellis, M.S.   +4 more
core   +1 more source

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

Validation of a Particle Image Velocimetry Algorithm Through Comparative Field and Laboratory Analysis

River Research and Applications, EarlyView.
ABSTRACT Flow velocity measurement is fundamental to hydrological and hydraulic studies, providing essential data for streamflow estimation and river dynamics analysis. Traditional in situ methods like propeller gauges and acoustic Doppler current profilers are accurate but intrusive and labour‐intensive, while non‐intrusive image processing methods ...
Ghazaleh Nassaji Matin, Gareth Bradbury, Alan Puttock, Kirsty Frith, Diego Panici   +4 more
wiley   +1 more source