Results 11 to 20 of about 17,244 (283)

Quantifying small‐magnitude soil erosion: Geomorphic change detection at plot scale [PDF]

open access: yesLand Degradation & Development, 2017
AbstractSoil erosion is a big concern in bare soils from burnt areas and agricultural lands that lack a vegetation cover. In those unprotected soils, intense rain episodes, typical in Mediterranean climate, cause severe soil erosion processes that have been well studied previously using a number of procedures, such as the geomorphic change detection ...
Matilde Balaguer‐Puig   +3 more
openaire   +3 more sources

Volumetric change analysis of the Cauvery delta topography using radar remote sensing

open access: yesEgyptian Journal of Remote Sensing and Space Sciences, 2022
Geomorphology refers to the study of the Earth’s physical land surface features. Digital Elevation Model (DEM) is a digital imagery where each pixel represents elevation value above or below mean sea level.
Sambandan Rajakumari   +3 more
doaj   +1 more source

Using UAS-Aided Photogrammetry to Monitor and Quantify the Geomorphic Effects of Extreme Weather Events in Tectonically Active Mass Waste-Prone Areas: The Case of Medicane Ianos

open access: yesApplied Sciences, 2023
Extreme weather events can trigger various hydrogeomorphic phenomena and processes including slope failures. These shallow instabilities are difficult to monitor and measure due to the spatial and temporal scales in which they occur.
Evelina Kotsi   +7 more
doaj   +1 more source

Remotely sensed mid-channel bar dynamics in downstream of the Three Gorges Dam, China [PDF]

open access: yes, 2020
The downstream reach of the Three Gorges Dam (TGD) along the Yangtze River (1560 km) hosts numerous mid-channel bars (MCBs). MCBs dynamics are crucial to the river’s hydrological processes and local ecological function.
Shao, Guofan   +4 more
core   +1 more source

Evaluating Elevation Change Thresholds between Structure-from-Motion DEMs Derived from Historical Aerial Photos and 3DEP LiDAR Data

open access: yesRemote Sensing, 2020
This study created digital terrain models (DTMs) from historical aerial images using Structure from Motion (SfM) for a variety of image dates, resolutions, and photo scales.
Peter Chirico   +2 more
doaj   +1 more source

A comparison of structure from motion photogrammetry and the traversing micro-erosion meter for measuring erosion on shore platforms [PDF]

open access: yesEarth Surface Dynamics, 2018
For decades researchers have used the micro-erosion meter and its successor the traversing micro-erosion meter to measure micro-scale rates of vertical erosion (downwearing) on shore platforms.
N. D. Cullen, A. K. Verma, M. C. Bourke
doaj   +1 more source

Monitoring Geomorphic Change and Catchment Sediment Production to Understand the Erosive Dynamics in a Gullied Channel by Means of High-Resolution DEMs

open access: yesProceedings, 2020
Gully erosion in valley bottoms is a frequent process with negative consequences in the dehesa environment. Soil loss, decrease of soil and descend in biomass are among the negative aftereffect of gully erosion processes.
Alberto Alfonso-Torreño   +5 more
doaj   +1 more source

The Impact of Acoustic Imaging Geometry on the Fidelity of Seabed Bathymetric Models [PDF]

open access: yes, 2018
Attributes derived from digital bathymetric models (DBM) are a powerful means of analyzing seabed characteristics. Those models however are inherently constrained by the method of seabed sampling. Most bathymetric models are derived by collating a number
Hughes Clarke, John E.
core   +4 more sources

Mapping the topographic fingerprints of humanity across Earth [PDF]

open access: yes, 2017
If increasingly globalized societies are to make better land management decisions, the geosciences must globally evaluate how humans are reshaping Earth 's ...
Ellis, E. C., Sofia, G., Tarolli, P.
core   +1 more source

Short Communication: A simple workflow for robust low-cost UAV-derived change detection without ground control points [PDF]

open access: yesEarth Surface Dynamics, 2019
High-quality 3-D point clouds generated from repeat camera-equipped unmanned aerial vehicle (UAV) surveys are increasingly being used to investigate landscape changes and geomorphic processes.
K. L. Cook, M. Dietze
doaj   +1 more source

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