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Assessing Water Erosion Processes in Degraded Area Using Unmanned Aerial Vehicle Imagery

Siqueira Junior, Paulo and Naves Silva, Marx Leandro and Candido, Bernardo Moreira and Pomar Avalos, Fabio Arnaldo and Gomes Batista, Pedro Velloso and Curi, Nilton and de Lima, Wellington and Quinton, John Norman. (2019) Assessing Water Erosion Processes in Degraded Area Using Unmanned Aerial Vehicle Imagery. Revista Brasileira de Ciência do Solo, 43. e0190051.

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Official URL: https://edoc.unibas.ch/79592/

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Abstract

The use of Unmanned Aerial Vehicles (UAVs) and Structure from Motion (SfM) techniques can contribute to increase the accessibility, accuracy, and resolution of Digital Elevation Models (DEMs) used for soil erosion monitoring. This study aimed to evaluate the use of four DEMs obtained over a year to monitor erosion processes in an erosion-degraded area, with occurrence of rill and gully erosions, and its correlation with accumulated rainfall during the studied period. The DEMs of Geomorphic Change Detection (GCD) of horizontal and vertical resolutions of 0.10 and 0.06 m were obtained. It was possible to detect events of erosion and deposition volumes of the order of 2 m(3), with a volumetric error of similar to 50 %, in rills and gullies in the initial stage denominated R and GS-I, respectively. Events of the order of 100 m(3), with a volumetric error around 14 % were found for advanced gullies, a segment denominated GS-II. In the three studied erosion situations, the deposition volume increased with the accumulated rainfall. The segments R and GS-I presented an inverse relationship between erosion volume and accumulated rainfall during the studied period. This behaviour can be explained by the dynamics of the deposition and erosion volumes during the erosion process. In the GS-II segment, erosion and deposition volumes were proportional and a direct relation with the cumulative rainfall over the studied period and a low percentage of volumetric error were found.
Faculties and Departments:05 Faculty of Science
05 Faculty of Science > Departement Umweltwissenschaften
05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften
05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Umweltgeowissenschaften (Alewell)
UniBasel Contributors:Batista, Pedro
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Sociedade Brasileira de Ciência do Solo
ISSN:0100-0683
e-ISSN:1806-9657
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:16 Dec 2020 15:22
Deposited On:16 Dec 2020 15:22

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