A Parametric Numerical Analysis of Factors Controlling Ground Ruptures Caused by Groundwater Pumping
Por:
Frigo, Matteo, Ferronato, Massimiliano, Yu, Jun, Ye, Shujun, Galloway, Devin, Carreon-Freyre, Dora, Teatini, Pietro
Publicada:
1 nov 2019
Ahead of Print:
1 nov 2019
Categoría:
Water science and technology
Resumen:
A modeling analysis is used to investigate the relative susceptibility
of various hydrogeologic configurations to aseismic rupture generation
due to deformation of aquifer systems accompanying groundwater pumping.
An advanced numerical model (GEPS3D) is used to simulate rupture
generation and propagation for three typical processes: (i) reactivation
of a preexisting fault, (ii) differential compaction due to variations
in thickness of aquifer/aquitard layers constituting the aquifer system,
and (iii) tensile fracturing above a bedrock ridge that forms the base
of the aquifer system. A sensitivity analysis is developed to address
the relative importance of various factors, including aquifer depletion,
aquifer thickness, the possible uneven distribution and depth below land
surface of the aquifer/aquitard layers susceptible to aquifer-system
compaction, and the height of bedrock ridges beneath the aquifer system
which contributes to thinning of the aquifer system. The rupture
evolution is classified in two occurrences. In one, the rupture develops
at either the top of the aquifer or at land surface and does not
propagate. In the other, the developed rupture propagates from the
aquifer top toward the land surface and/or from the land surface
downward. The aquifer depth is the most important factor controlling
rupture evolution. Specifically, the probability of a significant
rupture propagation is higher when the aquifer top is near land surface.
The numerical results are processed by a statistical regression analysis
to provide a general methodology for a preliminary evaluation of
possible ruptures development in exploited aquifer systems susceptible
to compaction and accompanying land subsidence. A comparison with a few
representative case studies in Arizona, USA, China, and Mexico supports
the study outcomes.
Filiaciones:
Frigo, Matteo:
Department of Civil, Architectural, and Environmental Engineering, University of Padova, Padova, Italy
Ferronato, Massimiliano:
Department of Civil, Architectural, and Environmental Engineering, University of Padova, Padova, Italy
Yu, Jun:
Key Laboratory of Earth Fissures Geological Disaster, Ministry of Land and Resources, Geological Survey of Jiangsu Province, Nanjing, China
Ye, Shujun:
School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
Galloway, Devin:
Earth Science Processes Division, Water Mission Area, United States Geological Survey, Indianapolis, IN, United States
Carreon-Freyre, Dora:
Centro de Geociencias, Universidad Nacional Autónoma de MéxicoQueretaro, Mexico
Teatini, Pietro:
Department of Civil, Architectural, and Environmental Engineering, University of Padova, Padova, Italy
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