Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging
Abstract In situ chemical oxidation (ISCO) is widely used for soil and groundwater remediation. However, reagents often cause pore clogging due to metal ion precipitation, reducing hydraulic conductivity (K) and altering flow paths. This study investigates the impact of pore‐clogging on three‐dimens...
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| Format: | Article |
| Language: | English |
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Wiley
2025-03-01
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| Series: | Water Resources Research |
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| Online Access: | https://doi.org/10.1029/2023WR036786 |
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| author | Bing‐Shiun Ke Yo‐Jin Shiau Bo‐Tsen Wang Chia‐Hao Chang Tian‐Chyi Jim Yeh Jui‐Pin Tsai |
| author_facet | Bing‐Shiun Ke Yo‐Jin Shiau Bo‐Tsen Wang Chia‐Hao Chang Tian‐Chyi Jim Yeh Jui‐Pin Tsai |
| author_sort | Bing‐Shiun Ke |
| collection | DOAJ |
| description | Abstract In situ chemical oxidation (ISCO) is widely used for soil and groundwater remediation. However, reagents often cause pore clogging due to metal ion precipitation, reducing hydraulic conductivity (K) and altering flow paths. This study investigates the impact of pore‐clogging on three‐dimensional K and flow fields during Fenton's reagent injection in a sandbox experiment. Time‐lapsed, steady‐state hydraulic tomography (HT) was employed to quantify the spatial evolution of the K field. Soil cores from low‐K regions were analyzed using inductively coupled plasma‐optical emission spectrometry for total iron (TI) concentration. Experimental results reveal a negative correlation between K and TI, with a maximum 56.5% decrease in K corresponding to a 30.8% increase in TI. This finding supports the use of HT to monitor K evolution due to pore clogging. We also found that pore‐clogging primarily occurred in high‐K zones near injection points. Solute transport simulation results based on the original and pore‐clogged K fields indicate that pore‐clogging impedes reagent transport, as evidenced by a larger high‐concentration region in the original K field. These results demonstrate that pore‐clogging from Fenton's reagent injection significantly affects K and reagent transport. Therefore, time‐lapsed HT is essential for updating K and flow fields to optimize reagent injection strategies. These findings provide valuable insights for hydraulic–geochemical studies, particularly in contaminated site remediation. |
| format | Article |
| id | doaj-art-eaa82292b5e9454785aabc47395d348c |
| institution | Kabale University |
| issn | 0043-1397 1944-7973 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Water Resources Research |
| spelling | doaj-art-eaa82292b5e9454785aabc47395d348c2025-08-20T03:30:57ZengWileyWater Resources Research0043-13971944-79732025-03-01613n/an/a10.1029/2023WR036786Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐CloggingBing‐Shiun Ke0Yo‐Jin Shiau1Bo‐Tsen Wang2Chia‐Hao Chang3Tian‐Chyi Jim Yeh4Jui‐Pin Tsai5Department of Bioenvironmental Systems Engineering National Taiwan University Taipei TaiwanDepartment of Bioenvironmental Systems Engineering National Taiwan University Taipei TaiwanDepartment of Bioenvironmental Systems Engineering National Taiwan University Taipei TaiwanDepartment of Bioenvironmental Systems Engineering National Taiwan University Taipei TaiwanDepartment of Hydrology and Atmospheric Sciences University of Arizona Tucson AZ USADepartment of Bioenvironmental Systems Engineering National Taiwan University Taipei TaiwanAbstract In situ chemical oxidation (ISCO) is widely used for soil and groundwater remediation. However, reagents often cause pore clogging due to metal ion precipitation, reducing hydraulic conductivity (K) and altering flow paths. This study investigates the impact of pore‐clogging on three‐dimensional K and flow fields during Fenton's reagent injection in a sandbox experiment. Time‐lapsed, steady‐state hydraulic tomography (HT) was employed to quantify the spatial evolution of the K field. Soil cores from low‐K regions were analyzed using inductively coupled plasma‐optical emission spectrometry for total iron (TI) concentration. Experimental results reveal a negative correlation between K and TI, with a maximum 56.5% decrease in K corresponding to a 30.8% increase in TI. This finding supports the use of HT to monitor K evolution due to pore clogging. We also found that pore‐clogging primarily occurred in high‐K zones near injection points. Solute transport simulation results based on the original and pore‐clogged K fields indicate that pore‐clogging impedes reagent transport, as evidenced by a larger high‐concentration region in the original K field. These results demonstrate that pore‐clogging from Fenton's reagent injection significantly affects K and reagent transport. Therefore, time‐lapsed HT is essential for updating K and flow fields to optimize reagent injection strategies. These findings provide valuable insights for hydraulic–geochemical studies, particularly in contaminated site remediation.https://doi.org/10.1029/2023WR036786pore‐cloggingISCO remediationhydraulic tomographyICP‐OESevolution of K fieldevolution of transport paths |
| spellingShingle | Bing‐Shiun Ke Yo‐Jin Shiau Bo‐Tsen Wang Chia‐Hao Chang Tian‐Chyi Jim Yeh Jui‐Pin Tsai Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging Water Resources Research pore‐clogging ISCO remediation hydraulic tomography ICP‐OES evolution of K field evolution of transport paths |
| title | Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging |
| title_full | Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging |
| title_fullStr | Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging |
| title_full_unstemmed | Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging |
| title_short | Time‐Lapsed Hydraulic Tomography for Monitoring Hydraulic Conductivity Field Evolution Caused by Pore‐Clogging |
| title_sort | time lapsed hydraulic tomography for monitoring hydraulic conductivity field evolution caused by pore clogging |
| topic | pore‐clogging ISCO remediation hydraulic tomography ICP‐OES evolution of K field evolution of transport paths |
| url | https://doi.org/10.1029/2023WR036786 |
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