Results 21 to 30 of about 518 (86)

Recent Evolution (1956–2017) of Rodas Beach on the Cíes Islands, Galicia, NW Spain

Journal of Marine Science and Engineering, 2019
Sedimentary coastal areas change rapidly and are economically and environmentally important. This research focuses on determining the extent to which natural dynamics and human activity have contributed to visible changes on Rodas, Cíes Islands in ...
Alejandro Gómez-Pazo, Augusto Pérez-Alberti, Xose Lois Otero Pérez   +2 more
doaj   +1 more source

Mitigating systematic error in topographic models for geomorphic change detection: accuracy, precision and considerations beyond off‐nadir imagery

Earth Surface Processes and Landforms, 2020
Unmanned aerial vehicles (UAVs) and structure‐from‐motion photogrammetry enable detailed quantification of geomorphic change. However, rigorous precision‐based change detection can be compromised by survey accuracy problems producing systematic ...
M. James, Gilles Antoniazza, S. Robson, S. Lane   +3 more
semanticscholar   +1 more source

Comment on “Assessing gully erosion and rehabilitation using multi temporal LiDAR DEMs: Case study from the Great Barrier Reef catchments, Australia” by Khan et al., 2023

International Soil and Water Conservation Research
Geomorphic change detection (GCD) using high resolution topographic data can provide important insights into geomorphological systems. However, considerations must first be given to the mechanisms and dynamics producing landscape change when considering ...
James S. Daley, Andrew P. Brooks, John R. Spencer   +2 more
doaj   +1 more source

Quantifying river morphological changes using multi‐satellite observations and in situ measurements

Earth Surface Processes and Landforms, Volume 51, Issue 3, March 2026.
This study integrates optical, radar and altimetry satellite data with river gauge measurements to estimate periodically submerged riverbed topography and quantify morphological change. By linking how often water covers the riverbed with water‐level variations, erosion and deposition patterns are mapped across a reach of Jamuna River.
Tek Narayan Bhattarai, Antonio Moreno‐Rodenas, Sanjay Giri, Maarten Bakker, Amgad Omer, Allen Bateman   +5 more
wiley   +1 more source

Using LiDAR‐Based DEM Elevation Difference Calculations to Estimate Net Streambank Erosion in an Iowa River, USA

River Research and Applications, Volume 41, Issue 7, Page 1418-1426, September 2025.
ABSTRACT Streambank erosion is an important source of sediment to river systems but is difficult to quantify at watershed scales. In this study, high‐resolution Light Detection and Ranging (LiDAR) measurements collected from 2009 and 2020 were used to quantify the difference in land surface elevation that occurred along the fourth and fifth‐order ...
Calvin F. Wolter, Keith E. Schilling, Matthew T. Streeter, Elliot S. Anderson   +3 more
wiley   +1 more source

Geomorphic Change Detection Using Cost-Effective Structure-from-Motion Photogrammetry: Evaluation of Direct Georeferencing from Consumer-Grade UAS at Orewa Beach (New Zealand)

, 2020
Unmanned aerial systems (UAS) and structure-from-motion photogrammetry are transforming the way we produce topo- graphic data, with applications covering many disciplines in the geosciences, including coastal studies.
S. Bertin, B. Levy, Trevor Gee, P. Delmas   +3 more
semanticscholar   +1 more source

The impact of riparian vegetation on bank erosion during extreme weather events

Earth Surface Processes and Landforms, Volume 50, Issue 10, August 2025.
This study uses lidar and aerial imagery to investigate relationships between riparian vegetation cover and bank erosion during extreme weather events. Bank erosion was related to riparian vegetation cover/removal and river geomorphology (notably radius of curvature and inner/outer bends).
Hamish Biggs, Arman Haddadchi, James Brasington, Jochen Bind, Justin Stout   +4 more
wiley   +1 more source

Quantifying streambank erosion: A comparison of physical surveys, aerial imagery and UAS LiDAR surveys

Earth Surface Processes and Landforms, Volume 50, Issue 6, May 2025.
Four methods were used to quantify short‐term (1–2 years) reach‐wide streambank erosion rates along three low‐order streams in western Virginia: (1) bank height and cross‐section (XS) surveys, (2) bank height and top of bank (TOB) surveys, (3) bank height survey and aerial imagery analysis and (4) DEM of Difference (DoD) using UAS LiDAR with channel ...
Layla El‐Khoury, Jack Kurki‐Fox, Barbara Doll   +2 more
wiley   +1 more source

UAV REMOTE SENSING APPLICATIONS IN BEACH-CLIFF SYSTEM MONITORING OF MORPHODYNAMIC PROCESSES

Mercator
This study aims to evaluate the morphodynamic changes in a beach-cliff system in northeastern Brazil using high resolution data collected by UAV-SfM techniques to understand the geomorphic changes of the coastal landscape.
M. Leisner, Davis Pereira de Paula, Y. Vasconcelos, Antônio Rodrigues Ximenes Neto, F. D. H. Bastos, Miguel da Guia Albuquerque, D. L. Alves, M. Façanha   +7 more
semanticscholar   +1 more source

The hydro‐geomorphic effects of wooden leaky barriers in a steep headwater stream

Earth Surface Processes and Landforms, Volume 50, Issue 6, May 2025.
The hydro‐geomorphic effects of 16 in‐stream wooden leaky barriers (LBs) were monitored over three years. The effects on velocities, inundation extent and celerity were limited. Localised backwater deposition initiated by LBs reduced velocities and increased inundation. A reach‐wide net deposition response of 3.49 ± 0.36 m3 was observed.
Stephen Addy, Mark Wilkinson, Paul Quinn
wiley   +1 more source