Three-dimensional numerical modeling of land subsidence in Shanghai, China

Ye, Shujun; Luo, Yang; Wu, Jichun; Yan, Xuesong; Wang, Hanmei; Jiao, Xue; Teatini, Pietro

doi:10.1007/s10040-016-1382-2

Cited by 59 publications

(27 citation statements)

References 21 publications

(33 reference statements)

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“…The aquitard between AqIV and AqV is AdV, which has a thickness of 20 to 40 m. Figure 4 illustrates the hydrogeological distribution feature of the shallow aquifers in the urban area. Table 1 shows the hydrogeological parameters of each aquifer [7,20]. The phreatic aquifer group is divided into two sub-layers.…”

Section: Case Studymentioning

confidence: 99%

Investigation of Groundwater Withdrawal and Recharge Affecting Underground Structures in the Shanghai Urban Area

Yang

et al. 2019

Sustainability

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In this paper, the hydrogeological features of Quaternary deposits in Shanghai as well as the characteristics of groundwater withdrawal and recharge in urban areas are investigated. One phreatic aquifer and five confined aquifers (AqI to AqV) are present in Shanghai, and these aquifers are separated by five aquitards. Groundwater withdrawal from confined aquifers has resulted in land subsidence in Shanghai. To control land subsidence, the groundwater withdrawal volume has been decreased, and the groundwater recharge volume has been increased since 1965. Correspondingly, the pressure head in confined aquifers has risen. The groundwater head increases in shallow aquifers may impact underground structures and lead to the following issues: i) an increased risk of water in-rushing hazards caused by confined water pressure during structural excavations and ii) an increased instability risk caused by groundwater buoyancy. Both excavation anti-uprush and underground structure anti-floating are discussed in this paper. Based on the risk possibilities, the anti-uprush of the excavation is divided into six regions, and the structural anti-floating is divided into five regions in urban areas. To avoid geohazards caused by the rise in groundwater head, real-time monitoring of the pressure head in AqII is recommended.

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Section: Case Studymentioning

confidence: 99%

Investigation of Groundwater Withdrawal and Recharge Affecting Underground Structures in the Shanghai Urban Area

Yang

et al. 2019

Sustainability

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“…Existing studies have primarily focused on two aspects: land subsidence monitoring using various techniques supplemented by characteristic analysis and the evaluation of soil layer deformations (Bonì et al 2015;Cigna et al 2012;Galloway and Burbey 2011;Hung et al 2009;Shi et al 2007;Tomás et al 2013;Zhang et al 2014), and the numerical simulation and prediction of land subsidence induced by groundwater extraction (Chen et al 2003;Hung et al 2012;Kim and Parizek 2005;Yang et al 2015;Ye et al 2016). Regarding the former aspect, various methods employing ground-based and remotely sensed geodetic surveys are used for measuring and mapping spatial gradients and the temporal rates of regional and local subsidence as well as horizontal ground motion.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the vertical deformation of aquifer soils under conditions of withdrawing and recharging of groundwater in Tongchuan region, China

2016

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Land subsidence due to aquifer-system compaction accompanying groundwater extraction is a global hazard. Rising urban construction and groundwater demand necessitate increased awareness and better understanding of the geological problem. Motivated by the lack of laboratory-scale studies on this issue, an experimental investigation on the newly developed Tongchuan region, China, is presented. The study addresses the deformation behaviors of three soil samples, with the lithology of silty clay, silt, and fine sand, under the conditions of groundwater withdrawal and recharge using the GDS Consolidation Testing System. Results indicate that all three samples were characterized by elastic-plastic deformation under the conditions of withdrawing and recharging. The vertical deformation of the silty clay in the aquitard above the first confined aquifer was larger than those of the other two samples, and its deformation is a gradual and long process; thus, considerable attention should be paid to deformation in this aquitard due to the apparent creep effect and tiny rebound deformation. However, the settlement of the fine sand in the second confined aquifer cannot be ignored due to the great thickness of the aquifer. For the same soil, as the pore-water pressure declined, the unit rate of vertical deformation decreased gradually, whereas the creep effect of deformation in the later declining stage of pore-water pressure was more apparent than that in the former declining stage. These observations are highly important to the local government, which is developing measures to prevent and control subsidence.

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“…Earth fissures accompanying anthropogenic land subsidence due to excessive aquifer exploitation create significant geohazards in China (Ye et al, 2016 and worldwide (Conway, 2016;Peng et al, 2016;Teatini et al, 2018). In China, there are more than 1000 earth fissures identified in densely urbanized regions, specifically Fenwei Basin, North China Plain, and Yangtze River delta (Ye et al, 2016). As an example, the direct and indirect economic loss in Guangming Village of Wuxi city was about USD 20 million in a 1 km 2 area crossed by two earth fissures .…”

Section: Introductionmentioning

confidence: 99%

“…Understanding the generation of earth fissures and modelling their occurrence and propagation are important issues to be addressed. Recently, Ye et al (2018) proposed a novel modelling approach to simulate earth fissure generation and propagation in 3D complex geological settings. A nested two-scale approach associated with an original non-linear elasto-plastic finite element/interface element simulator allows modeling the mechanics of earth fissures.…”

Section: Introductionmentioning

confidence: 99%

A New Software to Model Earth Fissure Caused by Extensive Aquifer Exploitation and its Application to the Guangming Village Case, China

Frigo

Zhang

et al. 2020

Proc. IAHS

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Earth fissures accompanying anthropogenic land subsidence due to excessive aquifer exploitation create significant geohazards in China. Numerical models represent a unique scientific approach to predict the generation and development of earth fissures. However, the common geomechanical simulators fail to reproduce fissure development because they cannot be effectively applied in discontinuous mechanics. An innovative modelling approach developed recently is applied to develop a software to simulate fissure development. The pressure changes are used as forcing factors in a 3D geomechanical model, which combines Finite Elements and Interface Elements to simulate the deformation of the continuous aquifer system and the generation and sliding/opening of earth fissures. The approach has been applied to simulate the earth fissures at Guangming Village in Wuxi, China with land subsidence of more than 1 m caused by the overexploitation of the second confined aquifer. The modelling results highlight that the earth fissures at Guangming Village have been caused by tension and shear stresses. Based on the developed modelling approach and the application case study, a software platform is developed to provide a fast preliminary evaluation of the risk of fissure occurrence associated to land subsidence. The software allows for the simulation of a simplified 2D conceptual geologic model of earth fissures, which can be used to investigate how the main factors controlling the geomechanical response of the aquifer system, such as pressure changes, geometry of aquifer system, geomechanical properties, and depth of bedrock/fault etc.

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Three-dimensional numerical modeling of land subsidence in Shanghai, China

Cited by 59 publications

References 21 publications

Investigation of Groundwater Withdrawal and Recharge Affecting Underground Structures in the Shanghai Urban Area

Investigation of Groundwater Withdrawal and Recharge Affecting Underground Structures in the Shanghai Urban Area

Experimental study on the vertical deformation of aquifer soils under conditions of withdrawing and recharging of groundwater in Tongchuan region, China

A New Software to Model Earth Fissure Caused by Extensive Aquifer Exploitation and its Application to the Guangming Village Case, China

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