Experimental study on the artificial recharge of semiconfined aquifers involved in deep excavation engineering

Zheng, Gang; Cao, Jianran; Cheng, Xuesong; Ha, Da; Wang, F.J.

doi:10.1016/j.jhydrol.2018.01.020

Cited by 34 publications

(6 citation statements)

References 19 publications

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“…This can be difficult to address when the unsaturated zone is very thick or when perched water tables capture a part of recharge flow (Horton, 2000; Woessner & Poeter, 2020). Since Watson et al (1978) developed a numerical solution for unsaturated flow through porous materials to study the infiltration from a perched water table, most approaches have relied either on analytical and numerical solutions or on a combination of these with other methods (Zheng et al, 2018). A large share of the literature pertains to the local scale.…”

Section: Introductionmentioning

confidence: 99%

Modelling regional effects of artificial groundwater recharge in a multilayer aquifer characterized by perched water tables

Gómez‐Escalonilla,

Heredia,

Martínez‐Santos

et al. 2024

Hydrological Processes

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This paper presents an approach to estimate the effects of a managed recharge experiment in a multilayer aquifer characterized by the presence of perched water tables in the Medina del Campo groundwater body, Douro basin, central Spain. A numerical model was developed to evaluate the effect of artificial recharge on the shallow sector of a regional‐scale aquifer and on formerly active wetlands. The model was developed in the Visual MODFLOW Pro v.2011.1 environment in order to represent and analyse the regional impact of this artificial recharge event. Results suggest that the assumption of a single perched system may prove useful in regional contexts where data is limited. From a study site perspective, managed recharge is observed to increase shallow storage along the riverbanks, which is considered valuable for environmental purposes. However, downstream wetlands are unlikely to experience a significant recovery. Furthermore, only a small percentage of artificial recharge is expected to reach the deep regional aquifer. This method can be exported to settings characterized by the presence of perched aquifers and associated groundwater dependent ecosystems.

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Section: Introductionmentioning

confidence: 99%

Modelling regional effects of artificial groundwater recharge in a multilayer aquifer characterized by perched water tables

Gómez‐Escalonilla,

Heredia,

Martínez‐Santos

et al. 2024

Hydrological Processes

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“…In surveys of clogging events in the disciplines of environmental engineering, geotechnical engineering, and biological engineering, clogging particles were mostly fine particles, such as sandy-silt [18], suspended solids [19][20][21][22], Advances in Civil Engineering clay [23], or even colloid deposits [24]. For filter media, particle size includes two types: fine media, such as sandy loam [25], fine sand [26,27], compost, and peat [19]; and coarse media, such as sand or mulch soil [20,21] and even gravel beds [28,29].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Occurrence of Clogging in Highly Permeable Coarse Soils of Dam Foundations

Han

et al. 2020

Advances in Civil Engineering

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Leakage through the permeable coarse soils of dam foundations in Tibet, China, lessened over time without any additional antiseepage measures. In fact, clogging generated during the infiltration process is recognized as the major factor in reducing leakage. A laboratory study was conducted to understand clogging in highly permeable coarse soil of a dam foundation with the primary aim of determining the clogging patterns and optimum clogging particle size (PS). Seven replicate experiments were constructed using soil media with PS ranges of 32–64 mm, 16–32 mm, 8–16 mm, 4–8 mm, 2–4 mm, 1-2 mm, and 0.5–1 mm to observe clogging after feeding the soil media with sediments of different PSs. The experimental results showed that four clogging patterns were formed in different PSs of the coarse foundation soil. The ratio of the effective aperture of the soil Dea and the equivalent clogging particle size dede/Dea had a dominant effect on the four clogging patterns (surface clogging, de/Dea>1; surface-internal clogging, 0.5<de/Dea≤1; internal partial pore blockage, 0.25<de/Dea≤0.5; and unclogging, de/Dea≤0.25). The assessment criterion of the optimum clogging pattern was determined by 0.5<de/Dea≤1, and from that, the optimum clogging PS do was calculated.

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“…In some projects, the depth of excavation reaches the top of MCA [15]. As excavation depth is increased, the remaining bottom soil is insufficient to counteract the artesian head underneath the excavation, leading to seepage and inrushing damage to the excavation [9,25,26]. This is particularly true for the excavations above the coastal MCA, for which the critical excavation depth is usually less than 10 m according to the Shanghai design specification for the requirement of surge resistance [14].…”

Section: Introductionmentioning

confidence: 99%

“…This is particularly true for the excavations above the coastal MCA, for which the critical excavation depth is usually less than 10 m according to the Shanghai design specification for the requirement of surge resistance [14]. Consequently, dewatering measurements should be adopted in excavations to reduce or even eliminate the adverse effects due to artesian groundwater [8,10,[26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Estimation of Groundwater Fluctuation and Ground Settlement due to Dewatering in a Coastal Shallow Confined Aquifer

Zhang

et al. 2019

JMSE

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The coastal micro-confined aquifer (MCA) in Shanghai is characterized by shallow burial depth, high artesian head, and discontinuous distribution. It has a significant influence on underground space development, especially where the MCA is directly connected with deep confined aquifers. In this paper, a series of pumping well tests were conducted in the MCA located in such area to investigate the dewatering-induced groundwater fluctuations and stratum deformation. In addition, a numerical method is proposed for the estimation of hydraulic parameter, and an empirical prediction method is developed for dewatering-induced ground settlement. Test results show that groundwater drawdowns and soil settlement can be observed not only in MCA but also in the aquifers underneath it. This indicates that there is a close hydraulic connection among each aquifer. Moreover, the distributions and development of soil settlement at various depths are parallel to those of groundwater drawdowns in most areas of the test site except the vicinity of pumping wells, where collapse-induced subsidence due to high-speed flow may occur. Furthermore, the largest deformation usually occurs at the top of the pumping aquifer instead of the ground surface, because the top layer is expanded due to the stress arch formed in it. Finally, the proposed methods are validated to be feasible according to the pumping well test results and can be employed to investigate the responses of groundwater fluctuations and stratum deformations due to dewatering in MCA.

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Experimental study on the artificial recharge of semiconfined aquifers involved in deep excavation engineering

Cited by 34 publications

References 19 publications

Modelling regional effects of artificial groundwater recharge in a multilayer aquifer characterized by perched water tables

Modelling regional effects of artificial groundwater recharge in a multilayer aquifer characterized by perched water tables

Exploring the Occurrence of Clogging in Highly Permeable Coarse Soils of Dam Foundations

Experimental Study and Estimation of Groundwater Fluctuation and Ground Settlement due to Dewatering in a Coastal Shallow Confined Aquifer

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