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Theoretical Study on the Groundwater Flow Induced by Artificial Recharge in Confined Aquifer Considering Permeability Degradation
Clogging is ubiquitous and inevitable in long-term recharge and has significant influence on the groundwater flow. In this study, a mathematical model of groundwater flow is established to estimate the seepage field induced by single-well recharge. In this model, well clogging is considered under the assumption that the permeability coefficient is exponentially decayed. Moreover, the variable recharge rate and hydraulic head are assumed to be exponentially increasing and are implemented by setting dynamic hydraulic head and flux boundary. The model is solved using integral-transform method. Furtherly, the influences of the permeability degradation, recharge flux, and applied pressure on the groundwater flow and recharge ability are analyzed. Results show that the permeability degradation has considerable influence on the operation capacity of the recharge well and the distribution of seepage field. The influence tends to be more significant with the increase of the operation time. The adverse effect of permeability degradation on recharge can be eliminated to a certain extent by improving the recharge flow and pressure.
Theoretical Study on the Groundwater Flow Induced by Artificial Recharge in Confined Aquifer Considering Permeability Degradation
Clogging is ubiquitous and inevitable in long-term recharge and has significant influence on the groundwater flow. In this study, a mathematical model of groundwater flow is established to estimate the seepage field induced by single-well recharge. In this model, well clogging is considered under the assumption that the permeability coefficient is exponentially decayed. Moreover, the variable recharge rate and hydraulic head are assumed to be exponentially increasing and are implemented by setting dynamic hydraulic head and flux boundary. The model is solved using integral-transform method. Furtherly, the influences of the permeability degradation, recharge flux, and applied pressure on the groundwater flow and recharge ability are analyzed. Results show that the permeability degradation has considerable influence on the operation capacity of the recharge well and the distribution of seepage field. The influence tends to be more significant with the increase of the operation time. The adverse effect of permeability degradation on recharge can be eliminated to a certain extent by improving the recharge flow and pressure.
Theoretical Study on the Groundwater Flow Induced by Artificial Recharge in Confined Aquifer Considering Permeability Degradation
Li, Jiong (author) / Chen, Jin-Jian (author) / Li, Ming-Guang (author)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 1-12
2019-03-21
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2019
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| Online Contents | 2013