Geomorphological and geophysical analyses in a landslide area near Ebermannstadt, Northern Bavaria

Jäger, Daniel; Sandmeier, Christine; Schwindt, Daniel; Terhorst, Birgit

doi:10.3285/eg.62.2.06

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…This general pattern of the landslides from the Moldavian Plateau is very similar to other regions with monoclinal geological structures, like in Franconian and Svabian Alb, Germany [64,65,154] or Crimea [66].…”

Section: Resultssupporting

confidence: 75%

Using archaeological and geomorphological evidence for the establishment of a relative chronology and evolution pattern for Holocene landslides

2019

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Hilly regions around the world are one of the most vulnerable places for inhabitation, where landslides represent a permanent threat for their population. In some particular cases, in the past, due to their topographic features, areas affected by massive landslides served a real opportunity for the location of strategic and fortified settlements. In this study, we have extended a previous approach of correlation between landslides and archaeological heritage, adding 14 new representative case studies of landslided hillforts, a new period with landslided hillforts, and a new typology of relationship (landslided tumuli) for establishing relative chronologies for landslide inventories. The landslide mapping presented here supplements a previous inventory, which now has 1211 landslides, and it is based on the interpretation of high-resolution DEMs, geomorphometric derivatives, remote sensing images, and field validation. For one of the most characteristic sites (Băiceni settlement, Iaşi County), we used Electrical Resistivity Tomography (ERT) to assess the geometry of the compound and complex landslides. The current approach allowed us to acquire a more accurate relative chronology of landslide activity during the Holocene and Upper Pleistocene, and more importantly, to establish the pattern of landslides evolution in the Moldavian Plateau, North-Eastern Romania. The relict landslides are Lateglacial and Lower Holocene, the old landslides are post-Holocene Climatic Optimum and pre-Medieval, while the recent landslides are post-Medieval. The landslide magnitude decreased continuously, the new events being retrogressive reactivations of earlier events scarps and landslide bodies (as shown by the ERT data). Further studies on absolute dating will improve the relative chronology. Still, while not all the landslides can be dated, the methodology that we describe can be applied to increase the spatial density of the relative chronology. The presented approach can be used in other regions all over the world to establish the relative age of landslide inventories when archaeological topography can be related to landslide topography.

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Section: Resultssupporting

confidence: 75%

Using archaeological and geomorphological evidence for the establishment of a relative chronology and evolution pattern for Holocene landslides

2019

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“…Glade et al, 2017) or large landslides (e.g. Jäger et al, 2013) are abundant. In contrast, landsliding processes are characterized by cambering (Hutchinson, 1991), block gliding (Young, 1983), lateral spreading (Spreafico et al, 2017) or sliding processes (Pain, 1986;Schmidt and Beyer, 2003) at backscarps.…”

Section: Introductionmentioning

confidence: 99%

Geology and vegetation control landsliding on forest-managed slopes in scarplands

Draebing

Gebhard²,

Pheiffer³

2022

Preprint

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Abstract. Landslides are important agents of sediment transport, cause hazards and are key agents for the evolution of scarplands. To analyse geologic and vegetation control on landsliding, we investigated three landslides in the Franconian scarplands. We used geomorphic mapping, soil analysis, electrical resistivity and a mechanical stability model to quantify the stability state of the landslides. Furthermore, we mapped tree distribution, quantified rooted area and root tensile strength to assess the influence of vegetation on shallow landsliding. Our results show that landslides are deep-seated incorporating rotational and translational movement with sliding along a geologic boundary between permeable Rhätolias sandstone and impermeable Feuerletten clays. Despite low slope angles, landslides could be reactivated when high pore pressures could develop due to geologic conditions. In contrast, shallow landsliding is controlled by vegetation. Our results show that rooted area is more important than species dependent root tensile strength and limited to the upper 0.5 m of the surface due to geologically controlled unfavourable soil conditions. Due to low slope inclination, root cohesion can stabilize landslide toes or slopes undercut by forest roads, independent of potential soil cohesion, when tree density is sufficient dense. Forest management currently adapts forests to climate change by diversifying tree species and introducing European beech, which would increase slope stability when sufficient rooted area is reached. Forestry activities should aim to keep a certain tree density to enable sufficient root cohesion that prevent landslide activity between harvesting or adaption periods. In summary, geological conditions in scarplands favour landslide activity and influence vegetation control on landslide activity, which suggest a combined forest and hazard management should be applied to prevent future landsliding.

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“…Applied geophysics, through the employment of different methodologies, represents a useful tool to map subsurface features in a non-invasive way, and up to date, successful documented researches in rural settings dealing with different research objectives are available in the literature. Geological investigations for characterizing faults [1][2][3], landslides [4,5], paleo-morphologies [6,7], litho-stratigraphies [8,9], acquifers [10], sinkoles [11,12], and seepage detection [13] are generally carried out through electrical resistivity tomography (ERT) [1][2][3]5,7,9], ground penetrating radar (GPR) [8,10], seismic [2,[4][5][6], magnetic [14][15][16][17] and gravity [18] methods. Archae-geophysical prospections are particularly common in applications for the detection of buried structures, tombs, and channels through the application of electromagnetic methods [19,20], magnetometry [21], ERTs [22,23], GPR [24,25] or the combination of them.…”

Section: Introductionmentioning

confidence: 99%

Non-Destructive Techniques for Building Evaluation in Urban Areas: The Case Study of the Redesigning Project of Eleftheria Square (Nicosia, Cyprus)

et al. 2020

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This paper deals with the application of non-destructive geophysical techniques of investigation in the urban environment of the city of Nicosia (Cyprus). The main aim of the research was, in the frame of the Eleftheria Square redesign project, to image subsurface properties in order to reduce the impact of hazards on the old buildings (therefore preserving the cultural heritage of the place), and on the new infrastructure under construction. Since 2008, electrical resistivity tomography (ERT), ground penetrating radar (GPR) and induced electromagnetic method (EMI) were employed during the different phases of the project to provide an understanding of geological stratigraphy, the detection of buried objects (archaeological structures and underground utilities) and the solution of unexpected events (such as water infiltration in the course of works). The geophysical results proved the efficiency of the adopted methods, adding scientific value to the knowledge of the studied area. The new gathered information helped the public administration technicians to plan direct and targeted interventions and to modify the original design of the project according to the discovery of archaeological findings.

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Geomorphological and geophysical analyses in a landslide area near Ebermannstadt, Northern Bavaria

Cited by 11 publications

References 23 publications

Using archaeological and geomorphological evidence for the establishment of a relative chronology and evolution pattern for Holocene landslides

Using archaeological and geomorphological evidence for the establishment of a relative chronology and evolution pattern for Holocene landslides

Geology and vegetation control landsliding on forest-managed slopes in scarplands

Non-Destructive Techniques for Building Evaluation in Urban Areas: The Case Study of the Redesigning Project of Eleftheria Square (Nicosia, Cyprus)

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