Numerical simulation of groundwater flow and land deformation due to groundwater pumping in cross-anisotropic layered aquifer system

Zhou, Xi‐Lang; Hu-a-ng, K. R. M.; Wang, Jianhua

doi:10.1016/j.jher.2016.08.001

Cited by 13 publications

(8 citation statements)

References 27 publications

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“…The fissure flow in the shaft that was observed within the highly weathered sandstone layer was thought to have provided a 'short circuit' leakage pathway to the upper organic soil layer via the relatively permeable medium dense sand layer that was sandwiched in between them. Zhou et al (2017) also reported that fissures could occur because groundwater discharge often induced hydraulic forces that might impel the aquifer matrix to move vertically and horizontally, thus creating the imbalance forces. This phenomenon was thought to have resulted in a 4.5m groundwater table drawdown, as shown in Fig.…”

Section: Challenges Faced During Excavation Workmentioning

confidence: 99%

“…The principles of evaluating groundwater drawdown and replenishment using recharging wells are somewhat similar to groundwater pumping activities. Therefore, past research endeavors related to the manipulation of groundwater table involving the (i) effective use of recharging well system (CIRIA C515, 2000), (ii) use of numerical methods for drawdown analyses (Zhou et al, 2017, Ren et al, 2015, Qubain et al, 2014 as well as Chenaf and Chapuis, 2007) and (iii) effect of anisotropic of layered aquifer system on ground settlement (Zhou et al, 2017 andKetheeswaravenayagan et al, 2006), are important references. Mesri et al (1997) evaluated the secondary compression behavior of Middleton peat with and without surcharging by conducting a series of oedometer tests on undisturbed samples.…”

Section: Introductionmentioning

confidence: 99%

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Ground and Groundwater Responses Due to Shaft Excavation in Organic Soils

Ong

Jong

Cheng

2022

J. Geotech. Geoenviron. Eng.

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Excavation of a 16 m deep shaft was suspended due to groundwater drawdown of about 4.5 m that led to nearby ground subsidence and settlement of infrastructure. As a remedial measure, a deep-ground recharge system comprising multi-point recharging wells was conceived and then designed to mitigate the detrimental effects caused by the groundwater drawdown on nearby infrastructure. In the three-dimensional finite element model, fully coupled flow-deformation analyses have been successfully developed and used. The results of the numerical analyses show that the predicted and measured ground and groundwater responses achieved reasonably good agreement due to (i) successful understanding of the anisotropy of underlying site condition, (ii) sound 3D modeling technique and (iii) sound engineering remedial design. The simulation of this case study evidenced the detrimental effect of anisotropy in permeability of organic soil during groundwater drawdown, where the soil permeability in the horizontal direction is on average 5 times higher than the permeability in the vertical direction.

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Section: Challenges Faced During Excavation Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ground and Groundwater Responses Due to Shaft Excavation in Organic Soils

Ong

Jong

Cheng

2022

J. Geotech. Geoenviron. Eng.

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“…Groundwater flow and land deformation was integrated in an anisotropic aquifer system. The model was applied to conduct pumping recovery tests under various conditions in order to design groundwater pumping projects for Shanghai, China [11]. Carmen et al proposed a hydro-economic model to balance the trade-off between sustainable management of groundwater resources and the cost of overexploited aquifers in the Segura basin, Southeast Spain [12].…”

Section: Related Workmentioning

confidence: 99%

Real-Time Management of Groundwater Resources Based on Wireless Sensors Networks

Zhou

Chen

Zhang

et al. 2018

JSAN

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Abstract:Groundwater plays a vital role in the arid inland river basins, in which the groundwater management is critical to the sustainable development of area economy and ecology. Traditional sustainable management approaches are to analyze different scenarios subject to assumptions or to construct simulation-optimization models to obtain optimal strategy. However, groundwater system is time-varying due to exogenous inputs. In this sense, the groundwater management based on static data is relatively outdated. As part of the Heihe River Basin (HRB), which is a typical arid river basin in Northwestern China, the Daman irrigation district was selected as the study area in this paper. First, a simulation-optimization model was constructed to optimize the pumping rates of the study area according to the groundwater level constraints. Three different groundwater level constraints were assigned to explore sustainable strategies for groundwater resources. The results indicated that the simulation-optimization model was capable of identifying the optimal pumping yields and satisfy the given constraints. Second, the simulation-optimization model was integrated with wireless sensors network (WSN) technology to provide real-time features for the management. The results showed time-varying feature for the groundwater management, which was capable of updating observations, constraints, and decision variables in real time. Furthermore, a web-based platform was developed to facilitate the decision-making process. This study combined simulation and optimization model with WSN techniques and meanwhile attempted to real-time monitor and manage the scarce groundwater resource, which could be used to support the decision-making related to sustainable management.

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“…The following step‐by‐step instructions in Figure describe the detailed process of establishing a numerical model .…”

Section: Teaching Modulementioning

confidence: 99%

Improvement of students’ understanding about the phenomena of groundwater pumping by using computer software

Zhou

Wang

2018

Comp Applic In Engineering

Self Cite

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A teaching‐learning methodology by using computational software in teaching groundwater pumping in aquifer system is presented. In order to ensure the students grasp the theory and method of groundwater flow, as well as land subsidence due to pumping groundwater. The computational software‐COMSOL is used to solve the fully coupling equilibrium equations and flow equation. The assessment of the instructor includes: homework, group discussions, and small projects, which help to figure out the degree of understanding of students’ knowledge points. In addition, the teachers prompt students to reflect on what they have learned and use the obtained responses to evaluate the effectiveness of the course. The survey finds that most students believe that they can understand the equilibrium equations and the fully coupled flow equation according to the teacher's instructs, and can perform computer operations independently. The final test results show that this teaching‐learning methodology by using computational software has a very good teaching effect.

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Numerical simulation of groundwater flow and land deformation due to groundwater pumping in cross-anisotropic layered aquifer system

Cited by 13 publications

References 27 publications

Ground and Groundwater Responses Due to Shaft Excavation in Organic Soils

Ground and Groundwater Responses Due to Shaft Excavation in Organic Soils

Real-Time Management of Groundwater Resources Based on Wireless Sensors Networks

Improvement of students’ understanding about the phenomena of groundwater pumping by using computer software

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