Ground Failure Due to Gypsum Dissolution

Poyiadji, Eleftheria; Nikolaou, N.; Karmis, P.

doi:10.12681/bgsg.11315

Cited by 2 publications

(4 citation statements)

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“…For this reason, detailed studies are needed depending on the potential hazards and engineering judgment should be the main criterion for hazard and risk assessment. An example of such methodology adjusted to local conditions and type of geohazard was presented by Poyiadji et al [21]. The geohazard under assessment was the presence of sinkholes in several places in Cyprus and the main targets of the project were to study the areas with known problems affecting urban environment and to define the sinkhole prone areas in order to recommend appropriate mitigation measures.…”

Section: Integration Of Geohazards Into Urban Planning and Managementmentioning

confidence: 99%

Integration of Geohazards in Urban Planning and Management

Poyiadji

Kontogianni

Nikolaou

2017

AEF

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Geological conditions capable of causing damage, or loss of property and life, are called geological hazards and commonly referred to as "geohazards". Geohazards are recognised as a major threat for the society leading the scientific community into introducing various methodologies for susceptibility, hazard and risk assessments.The integration of these assessments into Urban Planning and Management can significantly enlarge society resilience to geohazards. For an effective integration of geohazards into Urban Planning and Management specific actions are needed: common guidelines, legislation for planning policies.Specific methodologies for hazard assessment specially designed for Urban planning with selected case studies are presented together with a description of relevant Greek legislation.

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Section: Integration Of Geohazards Into Urban Planning and Managementmentioning

confidence: 99%

Integration of Geohazards in Urban Planning and Management

Poyiadji

Kontogianni

Nikolaou

2017

AEF

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“…ERT data were inverted using a 2D smoothness constrained inversion program (Kim and Yi ). The algorithm is based on a 2.5D finite‐element forward solver that takes into account topo‐graphical variations.…”

Section: Ert Surveymentioning

confidence: 99%

“…The underground water circulation causes the dissolution of gypsum and the creation of karstic phenomena (doline, shafts, sinkholes, etc.) in the wider area (Poyiadji, Nikolaou, and Karmis 2010). a result, the final survey line layout may be dense but quite irregular.…”

Section: Ert Surveymentioning

confidence: 99%

See 1 more Smart Citation

3D inversion of irregular gridded 2D electrical resistivity tomography lines: Application to sinkhole mapping at the Island of Corfu (West Greece)

Kim

Tsourlos

Karmis

et al. 2016

Near Surface Geophysics

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We study the case of the combined interpretation of irregularly gridded 2D electrical resistivity tomography lines. A 3D inversion algorithm was specially modified to accommodate the full 3D processing of such lines. The chosen approach uses a dense structured mesh and a flexible parameter design scheme. Tests with synthetic data show that full 3D inversion results are significantly improved when compared with the equivalent quasi‐3D imaging of the 2D inversion results. It is also shown that 3D inversion results can provide correct location and shape information about targets that are not directly located under the measured lines. The scheme was tested with real data from a site in the northern part of the Corfu Island (West Greece) where a large number of irregular gridded 2D electrical resistivity tomography lines were collected in order to map sinkholes related to gypsum. The 3D inverted images provide important information about the structure of the existing sinkholes and the potential sinkhole generation mechanism. Overall, the possibility of 3D interpretation of irregularly gridded lines is not only important for obtaining better subsurface images but also allows a more flexible and practical design of electrical resistivity tomography field surveys.

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Ground Failure Due to Gypsum Dissolution

Abstract: Gypsum in Hellas and Cyprus occurs in three different types: (a) bedded (mainly of Messinian age in Cyprus and

Cited by 2 publications

References 10 publications

Integration of Geohazards in Urban Planning and Management

Integration of Geohazards in Urban Planning and Management

3D inversion of irregular gridded 2D electrical resistivity tomography lines: Application to sinkhole mapping at the Island of Corfu (West Greece)

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