Landslide displacement estimation by archival digital photogrammetry

Abstract

Archival multi-temporal aerial photogrammetry allows to measure displacements of a landslide area when images are co-registered in the same reference system. In this paper we\ud investigated three photogrammetric surveys performed in 1998, 2004 and 2007 in an area of the northern Apennine (Bologna). The study of morphological changes was carried out measuring in stereoscopic vision twelve natural points as roof corner of buildings. Changes were estimated comparing the respective coordinates of the points. Our DEM shows the morphological features and the kinematic of this sliding area with an average grid resolution of 5 m and a maximum elevation error of about 10 cm. Results can improve the geomorphological studies of sliding areas and assist in reducing future hazard

Analysis of Landslide Evolution Affecting Olive Groves Using UAV and Photogrammetric Techniques

“…In reality, the ascent of terrain surface in these zones was not due to an uplift of the terrain surface but to an advance of the landslide mass in the accumulation area (body and toe). This type of evolution has been observed in other studies [6][7][8][10][11][12][13][14][15]31,[34][35][36][37][38][39][40][41]45] with different types of landslides and it is related to displacements of the terrain surface in both the vertical and in the horizontal direction.…”

“…The displacement vectors both in the vertical and the horizontal components allowed us to distinguish between mobilized and stable zones, as has been described in previous studies [6,8,15,34,35,[39][40][41]. In general terms, the largest vector modules and the maintenance of uniform directions are indicative of those zones where movements occur.…”

“…In the case of medium to high resolution studies, with landslides of a diachronic evolution in which processes of reactivation separated in time take place [4,5], aerial photogrammetric techniques are very suitable and therefore their use is increasingly widespread [5][6][7][8][9][10][11][12][13][14][15][16][17], sometimes combined with LiDAR [5,10,12,16] or global navigation satellite system (GNSS) techniques [8]. In these for the automatic detection of movements of the terrain surface from the orthoimages have been proposed, as well as techniques of image co-registration [30,37,38,42].…”

El deslizamiento del 8 de diciembre de 1994 en el volcán Irazú (Costa Rica): aspectos históricos y geomorfología con base en fotografías aéreas históricas y recientes

“…Estos análisis se realizan actualmente con imágenes digitales, sin embargo, la necesidad de ampliar el rango temporal a épocas históricas necesita de la utilización de fotografías aéreas de archivo, obtenidas mediante técnicas analógicas. Los estudios multitemporales han sido aplicados en grandes cadenas montaño-sas (Zanutta, Baldi, Bitelli, Cardinali y Carrara, 2006;Fabris, Menin y Achilli, 2011;Micheletti, Lane y Chandler, 2015), o en volcanes activos tanto para el estudio de procesos gravitacionales o bien deformación cortical producto de la actividad tectónica y volcánica (Zlotnicki, Ruegg, Bacheley y Blum, 1990;Baldi, Fabris, Marsella y Monticelli, 2005;Baldi, Fabris, Marsella, Monticelli y Achilli, 2006;Baldi, Cenni, Fabris y Zanutta, 2008).…”

Preliminary results from active landslide monitoring using multidisciplinary surveys

“…Airphotos or satellite data and image analysis techniques can be an alternative solution for landslide mapping and monitoring (Fabris, Menin, & Achill, 2011;Mondini et al, 2011;Nichol, Shaker, & Wong, 2006). They present the advantage of covering broader areas within one scene and the drawback of repeatability as the purchase of very high resolution satellite data and the airplane campaigns are quite expensive.…”