Hydro-mechanical modeling of sinkhole occurrence processes in covered karst terrains during a flood

Luu, Li‐Hua; Noury, Gildas; Benseghier, Zeyd; Philippe, Pierre

doi:10.1016/j.enggeo.2019.105249

Cited by 20 publications

(11 citation statements)

References 24 publications

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“…It will be calibrated using the hydro-geo-data acquired above. The coupling of different techniques (computational fluid dynamics and discrete elements) has become increasingly used and most promising for hydromechanical collapse processes [89,90]. The model results will be upscaled to multichannel systems, and a conceptual model should be established for the region.…”

Section: Datasets and Methods For Field Campaigns And Geotouristic Tr...mentioning

confidence: 99%

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

Al-Halbouni

AlRabayah

Nakath

et al. 2022

Land

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This paper aims to identify and discuss the chances, solutions, and possible drawbacks related to the establishment of safe geotourism sites in subsidence-affected areas, exemplarily applied to the Ghor Al-Haditha sinkhole site at the southeastern shore of the Dead Sea. Such safe areas shall be established in the territory of the proposed future UNESCO Global Geopark (UGGp) in Jordan. The highlights of the geopark and the basis of its creation are the subsidence features and stream channels found along the SE shoreline of the Dead Sea, which form both a natural hazard and geological heritage of high international significance and have attracted many researchers so far. This recent and ongoing formation is related to the sharp regression of the lake, the specific geomechanical conditions, and the hydrogeologic and climatic background of the surroundings. Nearby communities have suffered in economic terms from these natural phenomena, including flash floods and droughts in this semi-arid to arid region. We here present a concept on how to integrate geoscientific research for hazard monitoring and early warning to maintain safety for inhabitants and visitors on the one hand and reach sustainable economic development through the establishment of geotourism sites on the other hand. This highlight area of the proposed UGGp serves as a starting example for delineating safe zones for walkways and infrastructure. This involves two-way knowledge transfer between spatial planning and hydrogeophysical monitoring, a network of community-supported geophysical surveillance, and regular maintenance and adaptation. The cross-cutting benefits for the territory involve the delineation of safe areas for agriculture and geotourism, the increase of sustainable tourism in the region with a shift towards alternative ways of income, more investment in infrastructure, a growth of international visibility of the region, enhanced environmental education with focus on responsible water usage, and involvement in international research and education projects.

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Section: Datasets and Methods For Field Campaigns And Geotouristic Tr...mentioning

confidence: 99%

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

Al-Halbouni

AlRabayah

Nakath

et al. 2022

Land

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“…The challenge, therefore, is to obtain insights into their dynamics-either short or long term-to evaluate their risk potential [15]. To do so, many analogue experiments [16][17][18][19][20][21][22][23][24][25] and numerical models [4,13,22,[25][26][27][28] have been proposed in the literature (see also [29] for a complementary review). However, these models mostly consider a homogeneous sedimentary bed and scarcely account for its complex structure.…”

Section: Introductionmentioning

confidence: 99%

Pipe Formation by Fluid Focalization in Bilayered Sediments

Gay,

Tangavelou,

Vidal

2024

Fluids

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Pipe structures are commonly encountered in the geophysical context, and in particular in sedimentary basins, where they are associated with fluid migration structures. We investigate pipe formation through laboratory experiments by injecting water locally at a constant flow rate at the base of water-saturated sands in a Hele–Shaw cell (30 cm high, 35 cm wide, gap 2.3 mm). The originality of this work is to quantify the effect of a discontinuity. More precisely, bilayered structures are considered, where a layer of fine grains overlaps a layer of coarser grains. Different invasion structures are reported, with fluidization of the bilayered sediment over its whole height or over the finer grains only. The height and area of the region affected by the fluidization display a non-monotonous evolution, which can be interpreted in terms of fluid focusing vs. scattering. Theoretical considerations can predict the critical coarse grains height for the invasion pattern transition, as well as the maximum topography at the sediment free surface in the regime in which only the overlapping finer grains fluidize. These results have crucial geophysical implications, as they demonstrate that invasion patterns and pipe formation dynamics may control the fluid expulsion extent and localization at the seafloor.

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“…In recent years, many methods for sinkhole risk mitigation have been developed, including: (i) methods that use subsurface sensors (e.g., conventional seismic stations, nano‐seismic monitoring, borehole extensometers and reflectometry techniques; Dahm et al, 2011; Gutiérrez et al, 2019; Land, 2013); (ii) remote sensing methodologies (e.g., radar interferometry for the evaluation of subsidence rates, airborne laser scanning and photogrammetry; Galve et al, 2011; Gutiérrez et al, 2019); (iii) methods that use apparatus in direct contact with the ground surface (e.g., trenching for the precise delimitation of specific sinkholes, ground‐based interferometric measures, high‐precision topographic profiling, Differential Global Navigation Satellite System or Differential Global Positioning System [DGNSS or DGPS], terrestrial laser scanning, measures with tiltmeters; Galve et al, 2011; Gutiérrez et al, 2019); (iv) geomorphological approaches and GIS‐based large‐scale mapping (Cahalan & Milewski, 2018; Nam et al, 2020; Perrin et al, 2015; Zumpano et al, 2019); (v) predictive stability charts developed on the basis of finite or discrete element modelling (FEM or DEM) or laboratory experiments based on equivalent physical models (Al‐Halbouni et al, 2019; Goodings & Abdulla, 2002; Jia et al, 2018; Luu et al, 2019; Perrotti et al, 2019; Xiao et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Geophysical surveys for non‐invasive characterization of sinkhole phenomena: A case study of Murisengo

Rita

Caselle

Comina

et al. 2023

Earth Surf Processes Landf

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The present research investigates the morphology and genetical mechanism of a sinkhole which occurred in 2019 in Murisengo (NW Italy). This landform is representative of several subsidence phenomena that often concern the Monferrato area (NW Italy). In concomitance with the appearance of the sinkhole at the surface, a cone of detrital material was found in the drifts of a nearby underground quarry. A geological survey was performed in the underground quarry in order to understand the interaction between the geological and geostructural features of the rock body and the generation of the sinkhole. Moreover, the underground sinkhole morphology was investigated through electrical resistivity tomography (ERT) surveys performed at the surface. The ERT outputs were combined to obtain a 3D image of the phenomenon and the 3D reconstruction was then compared with the geomorphological and structural setting of the area. Results suggest that a viscoplastic flow of clay‐rich sediments within a conduit in the gypsum bedrock (suffusion process) generated the sinkhole.

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Hydro-mechanical modeling of sinkhole occurrence processes in covered karst terrains during a flood

Cited by 20 publications

References 24 publications

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

A Vision on a UNESCO Global Geopark at the Southeastern Dead Sea in Jordan—How Natural Hazards May Offer Geotourism Opportunities

Pipe Formation by Fluid Focalization in Bilayered Sediments

Geophysical surveys for non‐invasive characterization of sinkhole phenomena: A case study of Murisengo

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