Determination of wetting soil water characteristics curve from disk infiltrometer measurements
A wetting soil water characteristic curve (SWCCw) is necessary for understanding and interpreting the re-distribution of infiltrated rainwater, percolation rate, and contaminant transport. Direct determination of SWCCw is tedious and needs destructive sampling and invasive sensor installation. This...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_25006.pdf |
| _version_ | 1797835299791831040 |
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| author | Naik Aparimita Priyadarshini Pekkat Sreeja |
| author_facet | Naik Aparimita Priyadarshini Pekkat Sreeja |
| author_sort | Naik Aparimita Priyadarshini |
| collection | DOAJ |
| description | A wetting soil water characteristic curve (SWCCw) is necessary for understanding and interpreting the re-distribution of infiltrated rainwater, percolation rate, and contaminant transport. Direct determination of SWCCw is tedious and needs destructive sampling and invasive sensor installation. This study demonstrates an indirect method for determining SWCCw based on infiltration measurements using a mini disc infiltrometer (MDI). Under controlled initial conditions, infiltration tests were conducted, coupled with real-time soil moisture and matric potential measurements using sensors. Sensor data facilitated assessment and cross-verification of SWCCw indirectly determined from MDI measurements. The indirect estimation involved inverse analysis and optimization of SWCCw parameters (α and n of the van Genuchten model) based on measured cumulative infiltration (CI) -versus-time response along with the knowledge of final volumetric water content (VWCf). The optimized SWCCw from MDI-infiltration matched the sensor-measured SWCCw reasonably well. The statistical tests using ANOVA proved that the CI measurements from MDI, together with VWCf information, are reliable input for inverse estimation of SWCCw and its parameters. Based on a realistic wetting process in the unsaturated zone beneath the disc infiltrometer, this study demonstrates the utility of a compact MDI for a quick, non-destructive measurement of SWCCw. |
| first_indexed | 2024-04-09T14:51:56Z |
| format | Article |
| id | doaj.art-5125c89b573140a4834edeacc03ec78a |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-04-09T14:51:56Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-5125c89b573140a4834edeacc03ec78a2023-05-02T09:28:20ZengEDP SciencesE3S Web of Conferences2267-12422023-01-013822500610.1051/e3sconf/202338225006e3sconf_unsat2023_25006Determination of wetting soil water characteristics curve from disk infiltrometer measurementsNaik Aparimita Priyadarshini0Pekkat Sreeja1Department of Civil Engineering, Indian Institute of TechnologyDepartment of Civil Engineering, Indian Institute of TechnologyA wetting soil water characteristic curve (SWCCw) is necessary for understanding and interpreting the re-distribution of infiltrated rainwater, percolation rate, and contaminant transport. Direct determination of SWCCw is tedious and needs destructive sampling and invasive sensor installation. This study demonstrates an indirect method for determining SWCCw based on infiltration measurements using a mini disc infiltrometer (MDI). Under controlled initial conditions, infiltration tests were conducted, coupled with real-time soil moisture and matric potential measurements using sensors. Sensor data facilitated assessment and cross-verification of SWCCw indirectly determined from MDI measurements. The indirect estimation involved inverse analysis and optimization of SWCCw parameters (α and n of the van Genuchten model) based on measured cumulative infiltration (CI) -versus-time response along with the knowledge of final volumetric water content (VWCf). The optimized SWCCw from MDI-infiltration matched the sensor-measured SWCCw reasonably well. The statistical tests using ANOVA proved that the CI measurements from MDI, together with VWCf information, are reliable input for inverse estimation of SWCCw and its parameters. Based on a realistic wetting process in the unsaturated zone beneath the disc infiltrometer, this study demonstrates the utility of a compact MDI for a quick, non-destructive measurement of SWCCw.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_25006.pdf |
| spellingShingle | Naik Aparimita Priyadarshini Pekkat Sreeja Determination of wetting soil water characteristics curve from disk infiltrometer measurements E3S Web of Conferences |
| title | Determination of wetting soil water characteristics curve from disk infiltrometer measurements |
| title_full | Determination of wetting soil water characteristics curve from disk infiltrometer measurements |
| title_fullStr | Determination of wetting soil water characteristics curve from disk infiltrometer measurements |
| title_full_unstemmed | Determination of wetting soil water characteristics curve from disk infiltrometer measurements |
| title_short | Determination of wetting soil water characteristics curve from disk infiltrometer measurements |
| title_sort | determination of wetting soil water characteristics curve from disk infiltrometer measurements |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/19/e3sconf_unsat2023_25006.pdf |
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