Results 81 to 90 of about 88,236 (205)

Whole System Ecohydrological Change Following Natural Flood Management and a Five‐Year Beaver Reintroduction Trial

Ecohydrology, Volume 19, Issue 4, June 2026.
ABSTRACT Once‐common beavers have been absent from the British landscape for centuries, but wild beaver populations have returned in recent years as part of reintroduction schemes, including releases into monitored enclosures. In North Yorkshire, such a release of Eurasian beavers took place in 2019.
Mark W. Smith, Alan Puttock, Megan J. Klaar, Huw Thomas, Lori Lawson Handley, Richard Brazier, Gareth Bradbury, Ambroise Baker, Ann Hanson, Nicholas Gibbons, Keith Gittens, Tom Spencer, Cath Bashforth   +12 more
wiley   +1 more source

Inversion of Side Scan Sonar Motion and Posture in Seabed Geomorphology

Polish Maritime Research, 2017
Side scan sonar measurement platform, affected by underwater environment and its own motion precision, inevitably has posture and motion disturbance, which greatly affects accuracy of geomorphic image formation.
Tao Weiliang, Liu Yan, Hu Wenbin
doaj   +1 more source

Autonomous Navigation in Large‐Scale Underground Environments Based on a Purely Topological Understanding of Tunnel Networks

Journal of Field Robotics, Volume 43, Issue 4, Page 2671-2692, June 2026.
ABSTRACT This work presents a non‐geometrical navigation approach based on a purely topological understanding of underground environments. By conceptualizing subterranean scenarios as a set of tunnels that intersect with each other, and taking a navigation approach based on topological instructions, we simplify the navigation problem to the sequential ...
Lorenzo Cano, Danilo Tardioli, Alejandro R. Mosteo   +2 more
wiley   +1 more source

Development of a 2 MHz Sonar Sensor for Inspection of Bridge Substructures

Sensors, 2018
Hydraulic factors account for a large part of the causes of bridge collapse. Due to the nature of the underwater environment, quick and accurate inspection is required when damage occurs.
Chul Park, Youngseok Kim, Heungsu Lee, Sangsik Choi, Haewook Jung   +4 more
doaj   +1 more source

Comparison of Conventional, Rake, and Sonar‐Based Biophysical Habitat Measurements in a Shallow Ontario River

River Research and Applications, Volume 42, Issue 5, Page 1011-1021, June 2026.
ABSTRACT Knowledge of habitat availability is critically important for the management and recovery of freshwater species. Quantifying habitat availability often requires fine‐scale sampling at point‐based locations across a large geographic extent, which can be laboursome.
Karl A. Lamothe, Jason Barnucz, D. Andrew R. Drake   +2 more
wiley   +1 more source

Three-dimentional reconstruction of underwater side-scan sonar images based on shape-from-shading and monocular depth fusion

Intelligent Marine Technology and Systems
Modern marine research requires high-precision three-dimensional (3D) underwater data. Underwater environments experience severe visible light attenuation, which leads to inferior imaging compared with air.
Yakun Ju, Jingchun Zhou, Shitong Zhou, Hao Xie, Cong Zhang, Jun Xiao, Cuixin Yang, Jian Sun   +7 more
semanticscholar   +1 more source

Incorporating environmental DNA metabarcoding for improved benthic biodiversity and habitat mapping

Remote Sensing in Ecology and Conservation, Volume 12, Issue 3, Page 444-461, June 2026.
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

Side‐Scan Sonar as a Tool For Measuring Fish Populations: Current State of the Science and Future Directions

Fisheries
Side‐scan sonar (SSS) is a powerful tool that can be used to address many key questions in fisheries science. In principle, SSS uses dual transducers to transmit a narrow‐beam, wide‐angle acoustic signal as the survey vessel transits an area.
J. Ridgway, John A. Madsen, Jesse R. Fischer, Robin D. Calfee, M. Acre, D. Kazyak   +5 more
semanticscholar   +1 more source

Computer vision methods for side scan sonar imagery

Measurement science and technology
Side-scan sonar (SSS) data presents a significant challenge to analysts due to the size of the material that requires processing. Automatic recognition systems can help in the interpretation and filtration of the data, reducing the time needed for ...
Michal Motylinski, A. Plater, J. E. Higham   +2 more
semanticscholar   +1 more source

A Multi-Scale Fusion Strategy for Side Scan Sonar Image Correction to Improve Low Contrast and Noise Interference

Remote Sensing
Side scan sonar images have great application prospects in underwater surveys, target detection, and engineering activities. However, the acquired sonar images exhibit low illumination, scattered noise, distorted outlines, and unclear edge textures due ...
Ping Zhou, Jifa Chen, Pu Tang, Jianjun Gan, Hongmei Zhang   +4 more
semanticscholar   +1 more source