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Preprints
https://doi.org/10.5194/nhess-2021-32
https://doi.org/10.5194/nhess-2021-32
08 Feb 2021
 | 08 Feb 2021
Status: this preprint has been withdrawn by the authors.

GNSS and RPAS integration techniques for studying landslide dynamics: Application to the areas of Victoria and Colinas Lojanas, (Loja, Ecuador)

Belizario A. Zárate Torres, Rachid El Hamdouni, and Tomas Fernández del Castillo

Abstract. This research tests the application of GNSS and RPAS techniques to the spatiotemporal analysis of landslide dynamics. Our method began by establishing non-permanent GNSS networks on the slope surfaces to perform periodic measurements by differential GNSS. Similarly, RPAS flights were made to acquire high-resolution images, which were oriented and georeferenced using ground control points and structure-from-motion algorithms to obtain digital surface models and orthophotos ultimately. Based on GNSS measurements, the direction and velocity of displacements were accurately calculated, and orthophotos and DSMs were used to calculate horizontal and vertical displacements in a set of significant points throughout the study area, reaching accuracies higher than 0.035 m in the GNSS data and 0.10 m in the RPAS data. These values were within the accuracy required for such studies. Based on the field observations and the results from the photogrammetric studies, the two studied landslides were classified as very slow flows.

This preprint has been withdrawn.

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This preprint has been withdrawn.

Short summary
This study analyzes the dynamics of two landslides in the city of Loja – Ecuador using GNSS and...
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