A method predicting pumping-induced ground settlement using back-analysis and its application in the Karla region of Greece

Constantine Stamatopoulos (), Petros Petridis (), Issaak Parcharidis () and Michael Foumelis ()
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Constantine Stamatopoulos: Stamatopoulos and Associates Co, Hellenic Open University
Petros Petridis: Stamatopoulos and Associates Co
Issaak Parcharidis: Harokopio University
Michael Foumelis: Risk and Prevention Unit at the French Geological Survey (BRGM)

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2018, vol. 92, issue 3, No 23, 1733-1762

Abstract: Abstract In many arid planar regions of the world, ground subsidence induced by the lowering of the water table line due to pumping has recently caused damage to houses and other overlying structures. The depth of the water table lowering is usually tens of meters, the depth of the underlying soil layers may be hundreds of meters, and the region where the lowering is applied may extend tens of square kilometers. In this aspect, the problem under consideration differs drastically from other geotechnical engineering problems and the application of the physical models may have the serious deficiency that required geotechnical information may be incomplete and very costly to obtain: The change in water table variation and the depth of rock are usually known from results of pumping borings and geophysical investigations, but the location, width, compressibility and consolidation characteristics of the clay layers, are usually not known. New space technologies, such as the phase shifting interferometry radar method, provide cost-effective measurements of past displacement data. Based on past displacement measurements, an alternative approach is proposed to predict ground subsidence induced by the lowering of the water table. In particular, the work derives a simplified equation and corresponding methodology which predicts ground subsidence in terms of water table history, based primarily on data of past ground subsidence. This equation was derived and validated based on a state-of-the-art proposed model predicting one-dimensional ground subsidence induced by water level lowering in planar regions. Based on the derived simplified expression, a method predicting the risk at the built environment due to future ground subsidence induced by water level lowering was proposed and applied successfully in a well-documented case study of ground subsidence: the Niki village at Thessaly, Greece.

Keywords: Consolidation; Ground subsidence; Change in water table elevation; Pumping; Clays; Differential interferometry radar; Back-analysis; Thessaly plain Karla region (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s11069-018-3276-1

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