Studying the influence of livestock pressure on gully erosion in rangelands of SW Spain by means of the UAV SfM workflow

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Studying the influence of livestock pressure on gully erosion in rangelands of SW Spain by means of the UAV SfM workflow

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Title: Studying the influence of livestock pressure on gully erosion in rangelands of SW Spain by means of the UAV SfM workflow
Author: Gómez Gutiérrez, Álvaro; Schnabel, Susanne; Lavado Contador, Joaquín Francisco; Sanjosé Blasco, Juan José de; Atkinson Gordo, Alan David James; Pulido Fernández, Manuel; Sánchez Fernández, Manuel
Abstract: La erosión por cárcavas supone un proceso de degradación del suelo frecuente en los sistemas agrosilvopastoriles del SO español que ha sido poco estudiado. Se analizan aquí la viabilidad de uso de vehículos aéreos no tripulados (UAV) y la fotogrametría SfM para cartografiar cárcavas de fondo de valle en estos paisajes. Los resultados muestran precisión centimétrica. Se debaten las fortalezas y limitaciones de la metodología empleada. La cartografía resultante permitió cartografiar las formas erosivas a una escala excepcional. Todas las zonas de estudio mostraron evidencias de degradación.Gully erosion in agrosilvopastoral systems of SW Spain represents a common degradation process, but has been hardly analysed. The suitability of using the Unmanned Aerial Vehicles (UAV) and Structure from Motion photogrammetry (SfM) workflow to map small valley-bottom gullies in these landscapes was tested. The results showed centimetre-level accuracy. Observed strengths and limitations of the UAV+SfM workflow in the study areas are discussed. The resulting cartography allowed mapping soil erosion forms at outstanding spatial scales. All study areas showed evidences of degradation.
URI: http://hdl.handle.net/10662/9968
Date: 2018


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