Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes
Reinjection of the discharged groundwater at construction site into a nearby aquifer is considered as a beneficial approach. However, the suspended particles contained in the discharged groundwater might reduce the permeability of subsurface porous media, resulting in a rapid decrease in the reinjec...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
|
| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025024132 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850072624017702912 |
|---|---|
| author | Chinhoo Jung Sang Hyun Kim Yeon Gyoung Chu Jaesang Lee Jin-O Choi Jaeshik Chung Seunghak Lee |
| author_facet | Chinhoo Jung Sang Hyun Kim Yeon Gyoung Chu Jaesang Lee Jin-O Choi Jaeshik Chung Seunghak Lee |
| author_sort | Chinhoo Jung |
| collection | DOAJ |
| description | Reinjection of the discharged groundwater at construction site into a nearby aquifer is considered as a beneficial approach. However, the suspended particles contained in the discharged groundwater might reduce the permeability of subsurface porous media, resulting in a rapid decrease in the reinjection efficiency. Therefore, to understand and predict the potential pore clogging during this particular process, we simulated the discharged groundwater recharging system and assessed the variation in hydraulic conductivities therein. The changes in relative hydraulic conductivities (K/K0) were observed in digital manometers-attached soil columns under various injection flux (Qsp) conditions. The relative hydraulic conductivities decreased more rapidly at a higher injection flux of suspended particles: K/K0 reached 0.1 in 13 h of injection when Qsp was 252 mg/h, while it took 550 h at the Qsp of 0.9 mg/h to attain the same K/K0. A critical time point, T0.1, at which the hydraulic conductivity decreased tenfold with respect to the initial, was estimated. Notably, two distinct patterns were observed in the transient variation in hydraulic conductivity depending on Qsp, an exponential reduction at higher Qsp and irregular pattern (e.g., temporary increases or plateaus) at relatively lower Qsp. A micro-computed tomography analysis revealed that the irregular patterns at lower Qsp were attributed to the seepage flow, which relocated the indigenous fine particles, changing the local porosity. However, at higher Qsp (e.g., 252 mg/h), pore clogging by the particles from the recharging water dominated this effect and resulted in a rapid and clear reduction in hydraulic conductivity. |
| format | Article |
| id | doaj-art-c6b490d9ab67426bb6236bd9c96ce876 |
| institution | DOAJ |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-c6b490d9ab67426bb6236bd9c96ce8762025-08-20T02:47:03ZengElsevierResults in Engineering2590-12302025-09-012710634110.1016/j.rineng.2025.106341Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxesChinhoo Jung0Sang Hyun Kim1Yeon Gyoung Chu2Jaesang Lee3Jin-O Choi4Jaeshik Chung5Seunghak Lee6Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea; Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL), Korea University, Seoul 02841, South KoreaWater Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea; Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, South KoreaWater Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea; Department of Civil, Environmental, and Architectural Engineering, Korea University, Seoul 02841, South KoreaDepartment of Civil, Environmental, and Architectural Engineering, Korea University, Seoul 02841, South KoreaEPS Engineering Co. Ltd., Gyeonggi-do 13930, South KoreaWater Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea; Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, South Korea; Corresponding authors at: Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea.Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea; Graduate School of Energy and Environment (KU-KIST GREEN SCHOOL), Korea University, Seoul 02841, South Korea; Division of Energy and Environment Technology, KIST School, Korea University of Science and Technology, Seoul 02792, South Korea; Corresponding authors at: Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, South Korea.Reinjection of the discharged groundwater at construction site into a nearby aquifer is considered as a beneficial approach. However, the suspended particles contained in the discharged groundwater might reduce the permeability of subsurface porous media, resulting in a rapid decrease in the reinjection efficiency. Therefore, to understand and predict the potential pore clogging during this particular process, we simulated the discharged groundwater recharging system and assessed the variation in hydraulic conductivities therein. The changes in relative hydraulic conductivities (K/K0) were observed in digital manometers-attached soil columns under various injection flux (Qsp) conditions. The relative hydraulic conductivities decreased more rapidly at a higher injection flux of suspended particles: K/K0 reached 0.1 in 13 h of injection when Qsp was 252 mg/h, while it took 550 h at the Qsp of 0.9 mg/h to attain the same K/K0. A critical time point, T0.1, at which the hydraulic conductivity decreased tenfold with respect to the initial, was estimated. Notably, two distinct patterns were observed in the transient variation in hydraulic conductivity depending on Qsp, an exponential reduction at higher Qsp and irregular pattern (e.g., temporary increases or plateaus) at relatively lower Qsp. A micro-computed tomography analysis revealed that the irregular patterns at lower Qsp were attributed to the seepage flow, which relocated the indigenous fine particles, changing the local porosity. However, at higher Qsp (e.g., 252 mg/h), pore clogging by the particles from the recharging water dominated this effect and resulted in a rapid and clear reduction in hydraulic conductivity.http://www.sciencedirect.com/science/article/pii/S2590123025024132Discharged groundwaterAquifer rechargePore cloggingHydraulic conductivity |
| spellingShingle | Chinhoo Jung Sang Hyun Kim Yeon Gyoung Chu Jaesang Lee Jin-O Choi Jaeshik Chung Seunghak Lee Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes Results in Engineering Discharged groundwater Aquifer recharge Pore clogging Hydraulic conductivity |
| title | Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes |
| title_full | Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes |
| title_fullStr | Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes |
| title_full_unstemmed | Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes |
| title_short | Hydraulic conductivity reduction during the recharge of the discharged groundwater: clogging pattern variation according to turbidity fluxes |
| title_sort | hydraulic conductivity reduction during the recharge of the discharged groundwater clogging pattern variation according to turbidity fluxes |
| topic | Discharged groundwater Aquifer recharge Pore clogging Hydraulic conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025024132 |
| work_keys_str_mv | AT chinhoojung hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes AT sanghyunkim hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes AT yeongyoungchu hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes AT jaesanglee hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes AT jinochoi hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes AT jaeshikchung hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes AT seunghaklee hydraulicconductivityreductionduringtherechargeofthedischargedgroundwatercloggingpatternvariationaccordingtoturbidityfluxes |