Geophysical and geotechnical methods for fluvial levee investigation: A review

Dezert, Théo; Fargier, Yannick; Lopes, Sérgio Palma; Côté, Philippe

doi:10.1016/j.enggeo.2019.105206

Cited by 28 publications

(14 citation statements)

References 223 publications

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“…Consequently, non-destructive shallow geophysical methods, allowing a fast and continuous assessment of physical parameters, have widely been utilised recently (see, e.g. : Perri, et al, 2014;Rahimi et al, 2018;Dezert et al, 2019;Jodry et al, 2019;Tresoldi et al, 2019;Lee et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Assessing the structure and composition of artificial levees along the Lower Tisza River (Hungary)

Sheishah¹,

Sípos²,

Hegyi³

et al. 2022

Geographica Pannonica

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Levees are earth structures constructed along alluvial rivers and are considered to be one of the essential components of flood risk and natural hazard reduction. The preservation of their condition would require orderly monitoring. In Hungary, an over 4200 km long levee system was constructed from the 19th century on. Since then, many natural and anthropogenic processes, such as compaction, erosion, subsidence etc., could contribute to the slow but steady deformation of these structures. In the meantime , due to the lack of documentation, their structure and internal composition are still unclear in many sections. The present study uses different geophysical techniques to validate their efficiency in detecting the structure, composition and potential defects along a 3.6 km levee section of the Lower Tisza River, affected significantly by seepage and piping phenomena during floods. Measurements were made using Ground Penetrating Radar (GPR), Electrical Resistivity Tomography (ERT) and drillings. Information obtained by the different techniques was cross-checked and combined. This way, the potential of the applied survey strategy could be demonstrated, and the selected levee section could be assessed in terms of its structure and composition. Consequently, the major reasons for frequently occurring adverse flood phenomena at the site could be revealed. The survey approach outlined in the present paper can be applied extensively along lowland levee systems in the region and elsewhere.

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Section: Introductionmentioning

confidence: 99%

Assessing the structure and composition of artificial levees along the Lower Tisza River (Hungary)

Sheishah¹,

Sípos²,

Hegyi³

et al. 2022

Geographica Pannonica

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“… 2018 ), infrastructure, buildings or landfill monitoring (Dezert et al. 2019 ; Romero-Ruiz et al. 2018 ), groundwater-surface water interactions (Fan et al.…”

Section: Review Of Tl-ert Applications Over the Past 30 Yearsmentioning

confidence: 99%

A Review on Applications of Time-Lapse Electrical Resistivity Tomography Over the Last 30 Years : Perspectives for Mining Waste Monitoring

et al. 2022

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Mining operations generate large amounts of wastes which are usually stored into large-scale storage facilities which pose major environmental concerns and must be properly monitored to manage the risk of catastrophic failures and also to control the generation of contaminated mine drainage. In this context, non-invasive monitoring techniques such as time-lapse electrical resistivity tomography (TL-ERT) are promising since they provide large-scale subsurface information that complements surface observations (walkover, aerial photogrammetry or remote sensing) and traditional monitoring tools, which often sample a tiny proportion of the mining waste storage facilities. The purposes of this review are as follows: (i) to understand the current state of research on TL-ERT for various applications; (ii) to create a reference library for future research on TL-ERT and geoelectrical monitoring mining waste; and (iii) to identify promising areas of development and future research needs on this issue according to our experience. This review describes the theoretical basis of geoelectrical monitoring and provides an overview of TL-ERT applications and developments over the last 30 years from a database of over 650 case studies, not limited to mining operations (e.g., landslide, permafrost). In particular, the review focuses on the applications of ERT for mining waste characterization and monitoring and a database of 150 case studies is used to identify promising applications for long-term autonomous geoelectrical monitoring of the geotechnical and geochemical stability of mining wastes. Potential challenges that could emerge from a broader adoption of TL-ERT monitoring for mining wastes are discussed. The review also considers recent advances in instrumentation, data acquisition, processing and interpretation for long-term monitoring and draws future research perspectives and promising avenues which could help improve the design and accuracy of future geoelectric monitoring programs in mining wastes.

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“…In the Dutch Rhine-Meuse delta river embankments, including dikes to reinforce natural levees, form an essential part of the primary flood defence. One of several key mechanisms threatening the stability of dikes is piping [1][2][3][4][5][6]. For this process, the occurrence of pervious layers overlain by impervious cover layers is of concern [7].…”

Section: General Overviewmentioning

confidence: 99%

“…In areas with heterogeneous alluvial deposits, the occurrence of piping is, for a large part, dependent on the hydrogeological setting. On a regional scale, the subsurface heterogeneity and the resulting hydrological setting precondition the occurrence of piping and sand boils [6,14,[17][18][19][20]. On a local scale, the formation of pipes is directly linked to the particle size distribution, which in itself is linked to the larger scale heterogeneity defined by the channel belt architecture.…”

Section: Subsurface Parametersmentioning

confidence: 99%

The Influence of Grain Size Distribution on the Hydraulic Gradient for Initiating Backward Erosion

Dirkx

Beek

Bierkens

2020

Water

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Backward erosion by piping is one of the processes that threaten the stability of river embankments in the Netherlands. During high river stages, groundwater flow velocities underneath the embankment increase as a result of the steepened hydraulic gradient. If a single outflow point exists or forms, the concentrated flow can entrain soil particles, leading to the formation of a subsurface pipe. The processes controlling this phenomenon are still relatively unknown due to their limited occurrence and because piping is a subsurface phenomenon. To study the initiation of piping, we performed laboratory experiments in which we induced water flow through a porous medium with a vertically orientated outflow point. In these experiments, we explicitly considered grain size variations, thus adding to the existing database of experiments. Our experiments showed that the vertical velocity needed for the initiation of particle transport can be described well by Stokes’ law using the median grain size. We combine this with a novel method to relate bulk hydraulic conductivity to the grain size distribution. This shows that knowledge of the grain size distribution and the location of the outflow point are sufficient to estimate the hydraulic gradient needed to initiate pipe formation in the experiment box.

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Geophysical and geotechnical methods for fluvial levee investigation: A review

Cited by 28 publications

References 223 publications

Assessing the structure and composition of artificial levees along the Lower Tisza River (Hungary)

Assessing the structure and composition of artificial levees along the Lower Tisza River (Hungary)

A Review on Applications of Time-Lapse Electrical Resistivity Tomography Over the Last 30 Years : Perspectives for Mining Waste Monitoring

The Influence of Grain Size Distribution on the Hydraulic Gradient for Initiating Backward Erosion

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