| Форма представления | Статьи в зарубежных журналах и сборниках |
| Год публикации | 2024 |
| Язык | русский |
|
Обносов Юрий Викторович, автор
|
|
Al-Maktomi Ali , автор
Al-Yaqoubi Shahad , автор
Kacimov Anvar Rashidovich, автор
|
| Библиографическое описание на языке оригинала |
Shahad A Al-Yaqoubi, Ali Al-Maktoumi, Yurii Obnosov, Anvar Kacimov. Clogging of toe drain drastically affects phreatic seepage in earth dams. Advances in Water Resources (Elsevier), 190 (2024) 104737 (WoS IF=4.51, Q1) |
| Аннотация |
In aged levees, toe (blanket) drains get clogged with time due to seepage-induced suffusion and translocation of fine soil fractions from the upstream to the downstream part of the embankment. These particles deposit on the top of the drain (usually, Terzhagi's graded gravel) as a cake. Also, high hydraulic gradients in the vicinity of the drain move the fine particles into the body of the coarse filter material such that “internal colmation” takes place. In this paper 2-D seepage to a clogged drain is studied experimentally, analytically and numerically. In a sandbox, we illustrate the difference in the position of a phreatic surface and the seepage flow rate between an equipotential toe drain and a clogged one. In the analytical solution, a potential flow model is used and the Newmann (Kirkham-Brock) boundary condition on the clogged drain surface (horizontal segment) is imposed. A circular triangle is mapped conformally onto a reference half-plane, where Hilbert's boundary value problem for a holomorphic function is solved. For a given size of the levee, clogging causes a significant rise of the phreatic surface, although the seepage flow rate drops. In HYDRUS2-D simulations, a FEM-meshed Richards' equation for a saturated-unsaturated 2-D flow is used for solving in a composite polygon, which mimics a vertical cross-section of a rectangular levee and a clogged-colmated blanket drain. Numerical results are in rough agreement with the analytical model. |
| Ключевые слова |
earth dam, phreatic surface, 2-D seepage, clogged filter, sandbox experiments, analytical solution by complex potential-hodograph method, HYDRUS2-D simulations |
| Название журнала |
Advances in Water Resources
|
| URL |
https://doi.org/10.1016/j.advwatres.2024.104737 |
| Пожалуйста, используйте этот идентификатор, чтобы цитировать или ссылаться на эту карточку |
https://repository.kpfu.ru/?p_id=300904 |
Полная запись метаданных  |
| Поле DC |
Значение |
Язык |
| dc.contributor.author |
Обносов Юрий Викторович |
ru_RU |
| dc.contributor.author |
Al-Maktomi Ali |
ru_RU |
| dc.contributor.author |
Al-Yaqoubi Shahad |
ru_RU |
| dc.contributor.author |
Kacimov Anvar Rashidovich |
ru_RU |
| dc.date.accessioned |
2024-01-01T00:00:00Z |
ru_RU |
| dc.date.available |
2024-01-01T00:00:00Z |
ru_RU |
| dc.date.issued |
2024 |
ru_RU |
| dc.identifier.citation |
Shahad A Al-Yaqoubi, Ali Al-Maktoumi, Yurii Obnosov, Anvar Kacimov. Clogging of toe drain drastically affects phreatic seepage in earth dams. Advances in Water Resources (Elsevier), 190 (2024) 104737 (WoS IF=4.51, Q1) |
ru_RU |
| dc.identifier.uri |
https://repository.kpfu.ru/?p_id=300904 |
ru_RU |
| dc.description.abstract |
Advances in Water Resources |
ru_RU |
| dc.description.abstract |
In aged levees, toe (blanket) drains get clogged with time due to seepage-induced suffusion and translocation of fine soil fractions from the upstream to the downstream part of the embankment. These particles deposit on the top of the drain (usually, Terzhagi's graded gravel) as a cake. Also, high hydraulic gradients in the vicinity of the drain move the fine particles into the body of the coarse filter material such that “internal colmation” takes place. In this paper 2-D seepage to a clogged drain is studied experimentally, analytically and numerically. In a sandbox, we illustrate the difference in the position of a phreatic surface and the seepage flow rate between an equipotential toe drain and a clogged one. In the analytical solution, a potential flow model is used and the Newmann (Kirkham-Brock) boundary condition on the clogged drain surface (horizontal segment) is imposed. A circular triangle is mapped conformally onto a reference half-plane, where Hilbert's boundary value problem for a holomorphic function is solved. For a given size of the levee, clogging causes a significant rise of the phreatic surface, although the seepage flow rate drops. In HYDRUS2-D simulations, a FEM-meshed Richards' equation for a saturated-unsaturated 2-D flow is used for solving in a composite polygon, which mimics a vertical cross-section of a rectangular levee and a clogged-colmated blanket drain. Numerical results are in rough agreement with the analytical model. |
ru_RU |
| dc.language.iso |
ru |
ru_RU |
| dc.subject |
earth dam |
ru_RU |
| dc.subject |
phreatic surface |
ru_RU |
| dc.subject |
2-D seepage |
ru_RU |
| dc.subject |
clogged filter |
ru_RU |
| dc.subject |
sandbox experiments |
ru_RU |
| dc.subject |
analytical solution by complex potential-hodograph method |
ru_RU |
| dc.subject |
HYDRUS2-D simulations |
ru_RU |
| dc.title |
Clogging of toe drain drastically affects phreatic seepage in earth dams. |
ru_RU |
| dc.type |
Статьи в зарубежных журналах и сборниках |
ru_RU |
|
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