An analytical solution for predicting the transient seepage from a subsurface drainage system

Xin, Pei; Dan, Han-Cheng; Zhou, Tianwei; Lu, Chunhui; Kong, Jun; Li, Ling

doi:10.1016/j.advwatres.2016.03.006

Cited by 22 publications

(16 citation statements)

References 37 publications

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“…They present results from experiments in a sand flume and report a water release of 12% of the volume between the initial and final water table. Using this value of 0.12 as storage coefficient in a 1-dimensional calculation based on the Dupuit Forchheimer assumption gives a result (figure below) which is very similar to the outcome of the analytical solution presented by Xin et al (2016) in their Figure 5a.…”

supporting

confidence: 71%

“…Note: Figure 5a of Xin et al (2016) shows the initial groundwater table erroneously at 0.4 m instead of the correct value of 0.45 m.…”

mentioning

confidence: 99%

“…Elsevier Editorial System(tm) for Advances in Water Resources Manuscript Draft Willem J. Zaadnoordijk, KWR Watercycle Research Institute, Nieuwegein, the Netherlands (until 1 July 2016), TNO-Geological Survey of the Netherlands, Utrecht, the Netherlands (starting 1 July 2016); also at: Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands wjz_rdam@yahoo.co.uk keywords: storage coefficient, specific yield, porosityXin et al (2016) present an approximate analytical solution to a variable saturated formulation of a drainage problem. They compared their solution to a saturated flow-based model and found a large discrepancy.…”

mentioning

confidence: 99%

“…They compared their solution to a saturated flow-based model and found a large discrepancy. However, the discrepancy is due to the value of the storage coefficient used and not to the model formulation Xin et al (2016). used the total porosity as the storage coefficient in the saturated flow-based model, while water table storage (often referred to as specific yield) usually is smaller (see a textbook such as…”

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Comment on ‘P. Xin et al., Advances in Water Resources 91 (2016) 1–10’

Zaadnoordijk

2016

Advances in Water Resources

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supporting

confidence: 71%

“…Note: Figure 5a of Xin et al (2016) shows the initial groundwater table erroneously at 0.4 m instead of the correct value of 0.45 m.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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confidence: 99%

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Comment on ‘P. Xin et al., Advances in Water Resources 91 (2016) 1–10’

Zaadnoordijk

2016

Advances in Water Resources

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“…Compared with the period of design, construction and operation of underground caverns, the excavation period is short but important, and excavation disasters caused by groundwater seepage are common [8,[21][22][23]. During excavation, the potential seepage boundary is formed immediately on the wall of the caverns and drainage system, but the descent of groundwater is a hysteretic result of the water retention capability of soil and rock mass [12,24,25]. Thus, the flow rate, hydraulic gradient and hydraulic pressure of caverns change dynamically [25,26], and these changes are influenced by the relation between the saturation and matric suction of soil and rock mass.…”

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confidence: 99%

Transient Seepage Analysis of Qingyuan Power Station Underground Caverns and Drainage Hole Arrays with Excavation Process

Cheng

Jaturapitakkul

2021

Arab J Sci Eng

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The disasters caused by groundwater during underground cavern excavation, are inevitable and difficult to predict. In this study, transient seepage analysis was performed during the excavation of Qingyuan power station's underground caverns and drainage hole arrays. The drainage hole arrays around the caverns were simulated using a new method, and the groundwater surface during transient seepage analysis was confirmed with the hydraulic conductivity adjustment method, by using ABAQUS user subroutines USDFLD and GETVRM. By simplifying the drainage hole into face geometry, the proposed drainage hole simulation method could reach the accuracy of the widely used substructure method with half nodes of the computational boundary, and reflect the influence of drainage hole diameter on seepage analysis results. Moreover, a sensibility analysis of the diameter and space of drainage hole arrays could be conducted using one simulation model with the proposed finite element mesh type. Transient seepage analysis showed the evolutions of the groundwater level, flow rate and maximum hydraulic gradient of drainage holes and underground caverns, during the construction of Qingyuan power station. Such results could provide a reference for the creation of design and construction schemes. The previous excavation of the drainage hole arrays could control the seepage field, and reduce the flow rate and maximum hydraulic gradient of the underground caverns. This study may provide valuable reference to the design and construction of similar projects.

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Water and salt replacement through soil salt leaching under brackish water conditions with subsurface pipe drainage

Zhao

et al. 2023

Irrigation and Drainage

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To explore the improvement effect of subsurface drainage and brackish water on saline alkali soil, an orthogonal experimental design was used to conduct soil column experiments under nine parameter combinations of the depth of the buried subsurface pipe, irrigation amount and salinity of brackish water.A numerical model of soil water and salt movement was established, and the physical parameters of the soil were verified by using the software HYDRUS-1D. The results indicated that the salinity of the brackish water only affected salt replacement. The salt replacement associated with subsurface drainage decreases with increasing water and salt replacement area at a constant irrigation volume. The salt replacement amount through subsurface pipe drainage increased with the irrigation amount in constant water and salt replacement areas. When the burial depths of the subsurface pipes were 140 and 160 cm and the irrigation amounts were >3180 and 3990 m 3 ha À1 , respectively, the salt discharge through the subsurface pipes was greater than the salt content carried by the brackish water, and the salt content of the soil in the root zone reached the critical salt tolerance value of cotton, which can simultaneously show that the soil salt content would not affect cotton growth.brackish water, irrigation amount, salt replacement amount, subsurface pipe drainage, water and salt replacement area RésuméEn vue d'explorer l'effet d'amélioration du drainage souterrain et de l'eau saumâtre sur le sol alcalin salin, un plan expérimental orthogonal a été utilisé pour mener des expériences sur des colonnes de sol sous neuf combinaisons de paramètres de profondeur d'enfouissement du tuyau souterrain, de quantité d'irrigation et de salinité de l'eau saumâtre. Un modèle numérique du Article title in French: Remplacement de l'eau et du sel par le lessivage du sel du sol dans des conditions d'eau saumatre avec un drainage souterrain par tuyaux.

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An analytical solution for predicting the transient seepage from a subsurface drainage system

Cited by 22 publications

References 37 publications

Comment on ‘P. Xin et al., Advances in Water Resources 91 (2016) 1–10’

Comment on ‘P. Xin et al., Advances in Water Resources 91 (2016) 1–10’

Transient Seepage Analysis of Qingyuan Power Station Underground Caverns and Drainage Hole Arrays with Excavation Process

Water and salt replacement through soil salt leaching under brackish water conditions with subsurface pipe drainage

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