000154646 001__ 154646
000154646 005__ 20250513101703.0
000154646 037__ $$aTAZ-TFG-2023-3081
000154646 041__ $$aspa
000154646 1001_ $$aZegarra Cayo, Yanara
000154646 24200 $$aMAPPING AND CHARACTERIZATION OF THE VILLAFRANCA DEL EBRO LANDSLIDE, EBRO VALLEY, ZARAGOZA.
000154646 24500 $$aCARTOGRAFÍA Y CARACTERIZACIÓN DEL DESLIZAMIENTO DE VILLAFRANCA DEL EBRO, VALLE DEL EBRO, ZARAGOZA.
000154646 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2023
000154646 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/
000154646 520__ $$aThe study area is located on the proximity of the village of Villafranca del Ebro, 20 km downstream of the city of Zaragoza. It comprises a section of the gypsum escarpment at the northern margin of the Ebro Valley. The main objective of the present work is to map and characterize the active Villafranca de Ebro landslide based on the observed geological and geomorphological features. To achieve this general objectives, it was necessary to identify the different landslide masses, determine the rupture mechanism, establish their relative chronology, infer the factors controlling the evolution of the landslides and evaluate the degree of activity. Using orthoimages and a Digital Elevation Model (DEM) a preliminary detailed mapping was produced. LIDAR data from 2010 and 2016 were utilized to produce higher resolution DEMs of different dates were generated. Using 274 zenithal drone photographs with longitudinal and transverse overlaps of 75%, a high-resolution DEM and orthomosaic were generated by photogrammetry. Detailed digital mapping on the drone-derived high-resolution data was carried out in which three main zones were recognized. The results obtained indicate that for zone 1 the volume of landslide is 486.846 m3, for zone 2 it is 2.395175 m3 and for zone 3 the volume is 4.273.375 m3, the sum of which gives a total volume of 7.155.596 m3. The development of rotational landslides is determined by three conditioning factors: (1) the lithostratigraphy, with the presence of clay sediments at the base of the escarpment which favors the development of listric failure planes; (2) the structure, characterized by a set of NW-SE-oriented joins which play a fundamental role in the development of the landslides and the evolution of the escarpment; and the topography. Among the triggering factors, precipitation is the most important because it can increase the moisture content of the clay level and favor lateral expansion. In addition, gypsum dissolution it is responsible for the widening of fissures, the development of collapses, and the loss of mechanical strength of the rock mass. Finally, fluvial erosion, which was relevant at the beginning of the evolutionary cycle, reduced the basal support by undermining inducing slope instability. Although slope movements do not pose a great risk, they can generate considerable economic losses. Therefore, detailed cartographic inventories help to identify unstable areas as an essential basis for risk mitigation by preventive planning.<br /><br />
000154646 521__ $$aGraduado en Geología
000154646 540__ $$aDerechos regulados por licencia Creative Commons
000154646 700__ $$aGutiérrez Santolalla, Francisco$$edir.
000154646 7102_ $$aUniversidad de Zaragoza$$bCiencias de la Tierra$$cGeodinámica Externa
000154646 8560_ $$f894663@unizar.es
000154646 8564_ $$s2002740$$uhttps://zaguan.unizar.es/record/154646/files/TAZ-TFG-2023-3081_ANE.pdf$$yAnexos (spa)
000154646 8564_ $$s2437720$$uhttps://zaguan.unizar.es/record/154646/files/TAZ-TFG-2023-3081.pdf$$yMemoria (spa)
000154646 909CO $$ooai:zaguan.unizar.es:154646$$pdriver$$ptrabajos-fin-grado
000154646 950__ $$a
000154646 951__ $$adeposita:2025-05-13
000154646 980__ $$aTAZ$$bTFG$$cCIEN
000154646 999__ $$a20230707112301.CREATION_DATE