Change in filtration gradients during head water drawdown
Changes in the water level in a reservoir lead to changes of filtration stream parameters in the soil structure. The position of the depression curve, value and direction of filtration gradients and speeds changes near the slope of the structure. Operation practice of waterworks in such conditions s...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
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| Series: | E3S Web of Conferences |
| Subjects: | |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/94/e3sconf_fci2023_02046.pdf |
| _version_ | 1797345308784459776 |
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| author | Aniskin Nikolay Stupivtsev Andrey |
| author_facet | Aniskin Nikolay Stupivtsev Andrey |
| author_sort | Aniskin Nikolay |
| collection | DOAJ |
| description | Changes in the water level in a reservoir lead to changes of filtration stream parameters in the soil structure. The position of the depression curve, value and direction of filtration gradients and speeds changes near the slope of the structure. Operation practice of waterworks in such conditions shows that emergencies are possible. Changes in filtration stream parameters can cause filtration deformations of soils and loss of slope stability of a soil dam. The article considers unsteady filtration in a homogeneous soil dam for five options of composing soils having various filtration coefficients. The reservoir drawdown rate is considered as an affecting factor. Using the numeric finite-element method and PLAXIS 2D software suite, filtration stream parameters were found for the considered options. Maximum filtration gradients near the upstream slope of the soil dam were found for various options of dam soil permeability and drawdown rate. As the reservoir draws down, directions and filtration gradients and rates change near the slope surface. Maximum gradients occur at various stages of drawdown depending on its speed and reservoir soil permeability. Maximum gradients are quite high, which shows the need for anti-filtration measures. |
| first_indexed | 2024-03-08T11:15:42Z |
| format | Article |
| id | doaj.art-ccc3cb1e3c5448e294a20f1e7e86945f |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-03-08T11:15:42Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-ccc3cb1e3c5448e294a20f1e7e86945f2024-01-26T10:35:45ZengEDP SciencesE3S Web of Conferences2267-12422023-01-014570204610.1051/e3sconf/202345702046e3sconf_fci2023_02046Change in filtration gradients during head water drawdownAniskin Nikolay0Stupivtsev Andrey1Moscow State University of Civil EngineeringMoscow State University of Civil EngineeringChanges in the water level in a reservoir lead to changes of filtration stream parameters in the soil structure. The position of the depression curve, value and direction of filtration gradients and speeds changes near the slope of the structure. Operation practice of waterworks in such conditions shows that emergencies are possible. Changes in filtration stream parameters can cause filtration deformations of soils and loss of slope stability of a soil dam. The article considers unsteady filtration in a homogeneous soil dam for five options of composing soils having various filtration coefficients. The reservoir drawdown rate is considered as an affecting factor. Using the numeric finite-element method and PLAXIS 2D software suite, filtration stream parameters were found for the considered options. Maximum filtration gradients near the upstream slope of the soil dam were found for various options of dam soil permeability and drawdown rate. As the reservoir draws down, directions and filtration gradients and rates change near the slope surface. Maximum gradients occur at various stages of drawdown depending on its speed and reservoir soil permeability. Maximum gradients are quite high, which shows the need for anti-filtration measures.https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/94/e3sconf_fci2023_02046.pdfearthen damfiltration coefficientreservoir drawdownunsteady filtrationfiltration gradient |
| spellingShingle | Aniskin Nikolay Stupivtsev Andrey Change in filtration gradients during head water drawdown E3S Web of Conferences earthen dam filtration coefficient reservoir drawdown unsteady filtration filtration gradient |
| title | Change in filtration gradients during head water drawdown |
| title_full | Change in filtration gradients during head water drawdown |
| title_fullStr | Change in filtration gradients during head water drawdown |
| title_full_unstemmed | Change in filtration gradients during head water drawdown |
| title_short | Change in filtration gradients during head water drawdown |
| title_sort | change in filtration gradients during head water drawdown |
| topic | earthen dam filtration coefficient reservoir drawdown unsteady filtration filtration gradient |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2023/94/e3sconf_fci2023_02046.pdf |
| work_keys_str_mv | AT aniskinnikolay changeinfiltrationgradientsduringheadwaterdrawdown AT stupivtsevandrey changeinfiltrationgradientsduringheadwaterdrawdown |