Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.clay.2024.107530 |
Licence  |
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| Title (Primary) | Modeling unsaturated hydraulic conductivity of compacted bentonite using a constrained CatBoost with bootstrap analysis |
| Author | Taherdangkoo, R.; Nagel, T.; Chen, C.-F.
; Mollaali, M.; Ghasabeh, M.; Cuisinier, O.; Abdallah, A.; Butscher, C. |
| Source Titel | Applied Clay Science |
| Year | 2024 |
| Department | ENVINF |
| Volume | 260 |
| Page From | art. 107530 |
| Language | englisch |
| Topic | T8 Georesources |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0169131724002783-mmc1.pdf |
| Keywords | Hydraulic conductivity; Bentonite; Categorial boosting; Bootstrap resampling; Constrained machine learning; Sobol indices |
| Abstract | Accurately determining the hydraulic conductivity of unsaturated bentonite is important for modeling subsurface thermo-hydro-mechanical and chemical processes. This study introduced a new hybrid model that employs a constrained categorial boosting (CatBoost) algorithm, combined with a genetic algorithm for hyperparameter tuning, to estimate the hydraulic conductivity of unsaturated compacted bentonite The performance of the constrained CatBoost model was benchmarked against a diverse set of data-driven baseline regression models, including lasso, elastic net, polynomial, k-nearest neighbors, decision tree, bagging tree, random forest, and CatBoost. The results indicated that the constrained CatBoost model offers a superior balance between model robustness and predictive accuracy in estimating the hydraulic conductivity of compacted bentonite-based materials during the wetting phase. The model effectively captured the U-shape relationship between hydraulic conductivity and suction, a key characteristic of bentonite behavior. Additionally, bootstrapping analyses confirmed the model's reliability under data variability, further validating its applicability in environmental and geotechnical applications. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=29650 |
| Taherdangkoo, R., Nagel, T., Chen, C.-F., Mollaali, M., Ghasabeh, M., Cuisinier, O., Abdallah, A., Butscher, C. (2024): Modeling unsaturated hydraulic conductivity of compacted bentonite using a constrained CatBoost with bootstrap analysis Appl. Clay Sci. 260 , art. 107530 10.1016/j.clay.2024.107530 |
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