KFU. Card publication. Two-dimensional Capillarity-Driven Seepage From a Lined Buried Ditch: the Kornev Subsurface Irrigation “Absorptional” Method Revisited

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TWO-DIMENSIONAL CAPILLARITY-DRIVEN SEEPAGE FROM A LINED BURIED DITCH: THE KORNEV SUBSURFACE IRRIGATION &LDQUO;ABSORPTIONAL&RDQUO; METHOD REVISITED

Form of presentation

Articles in international journals and collections

Year of publication

2025

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Authors, employees of KFU

Nikonenkova Tatyana Vladimirovna, author

Obnosov Yuriy Viktorovich, author

Other authors

Kacimov Anvar Rashidovich, author

Smagin Andrey Valentinvich, author

Bibliographic description in the original language

Two-dimensional Capillarity-Driven Seepage From a Lined Buried Ditch: the Kornev Subsurface Irrigation “Absorptional” Method Revisited. / Anvar Kacimov, Yurii Obnosov, Tatyana Nikonenkova, Andrey Smagin. // Advances in Water Resources. — Vol. 199. — 2025. — DOI:https://doi.org/10.1016/j.advwatres.2025.104917 (IF=4.0, Q1).

Annotation

Kornev's (1935, see e.g. p.74, Fig.34 - right panel) “open system” of capillarity-driven wetting of a fine-textured soil from a buried ditch filled by a coarse porous material is modeled analytically, using the methods of hodograph, and numerically, with the help of HYDRUS2D. Gravity, Darcian resistance of the soil at full saturation but negative pressure, and capillarity are three physical competing factors involved through the Vedernikov-Bouwer analytical model, which assumes 2-D, tension-saturated flow in a homogeneous soil sandwiched between the free surfaces (capillary fringe boundaries) and Kornev's impermeable liner of the ditch. Water seeps up from a line source, viz. a zero-pressure segment such that everywhere in the flow domain pressure remains negative. Lining minimizes deep percolation and facilitates upward and lateral spread of pore water by soil's capillarity. The free surfaces are streamlines, along which the pressure head is a negative constant (the air entrance pressure head, soil's property). For a small-depth ditch the hodograph domain is either a circular trigone, tetragon or sextagon, that determines three different flow topologies (with J.R.Philip's “dry shadow”, “dry bulb” and no dry zone at all on the leeward side of the liner and “wet lobes” hanging on the edge of the liner). The flow domain makes a capillary “fountain”. The complex potential domain is a half-strip such that the inversion method and conformal mappings are used. Transient, 2-D seepage in subsurface irrigation of a soil composite (“constructozem”), which consists of an ambient fine-textured soil and a buried Kornev's ditch (backfilled by a sand or peat), is numerically modeled by HYDRUS2D. Evapotranspiration is the fourth moisture-driving factor, which uplifts vadose zone moisture, combatting Pluto's gravity. The seepage flow rates, isobars, isohumes, isotachs, flow nets, vector-fields of Darcian velocity and other kinematic-dynamic seepage descriptors are found for various combinations of the physical properties of two contrasting porous materials and geometrical sizes (the width and depth of Kornev's ditch, depth of its burial, distance between neighbouring emitting ditches in a periodic irrigation system).

Keywords

: capillary fringe, tension-saturated seepage, complex potential, hodograph, conformal mappings, HYDRUS2D modeling of buried ditches as subsurface irrigators of constructozems

The name of the journal

Advances in Water Resources

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/185101/F_ADWR_25.pdf?sequence=1&isAllowed=y

URL

https://doi.org/10.1016/j.advwatres.2025.104917

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=310844&p_lang=2

Resource files

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Full metadata record

Field DC	Value	Language
dc.contributor.author	Nikonenkova Tatyana Vladimirovna	ru_RU
dc.contributor.author	Obnosov Yuriy Viktorovich	ru_RU
dc.contributor.author	Kacimov Anvar Rashidovich	ru_RU
dc.contributor.author	Smagin Andrey Valentinvich	ru_RU
dc.date.accessioned	2025-01-01T00:00:00Z	ru_RU
dc.date.available	2025-01-01T00:00:00Z	ru_RU
dc.date.issued	2025	ru_RU
dc.identifier.citation	Two-dimensional Capillarity-Driven Seepage From a Lined Buried Ditch: the Kornev Subsurface Irrigation “Absorptional” Method Revisited. / Anvar Kacimov, Yurii Obnosov, Tatyana Nikonenkova, Andrey Smagin. // Advances in Water Resources. — Vol. 199. — 2025. — DOI:https://doi.org/10.1016/j.advwatres.2025.104917 (IF=4.0, Q1).	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=310844&p_lang=2	ru_RU
dc.description.abstract	Advances in Water Resources	ru_RU
dc.description.abstract	Kornev's (1935, see e.g. p.74, Fig.34 - right panel) “open system” of capillarity-driven wetting of a fine-textured soil from a buried ditch filled by a coarse porous material is modeled analytically, using the methods of hodograph, and numerically, with the help of HYDRUS2D. Gravity, Darcian resistance of the soil at full saturation but negative pressure, and capillarity are three physical competing factors involved through the Vedernikov-Bouwer analytical model, which assumes 2-D, tension-saturated flow in a homogeneous soil sandwiched between the free surfaces (capillary fringe boundaries) and Kornev's impermeable liner of the ditch. Water seeps up from a line source, viz. a zero-pressure segment such that everywhere in the flow domain pressure remains negative. Lining minimizes deep percolation and facilitates upward and lateral spread of pore water by soil's capillarity. The free surfaces are streamlines, along which the pressure head is a negative constant (the air entrance pressure head, soil's property). For a small-depth ditch the hodograph domain is either a circular trigone, tetragon or sextagon, that determines three different flow topologies (with J.R.Philip's “dry shadow”, “dry bulb” and no dry zone at all on the leeward side of the liner and “wet lobes” hanging on the edge of the liner). The flow domain makes a capillary “fountain”. The complex potential domain is a half-strip such that the inversion method and conformal mappings are used. Transient, 2-D seepage in subsurface irrigation of a soil composite (“constructozem”), which consists of an ambient fine-textured soil and a buried Kornev's ditch (backfilled by a sand or peat), is numerically modeled by HYDRUS2D. Evapotranspiration is the fourth moisture-driving factor, which uplifts vadose zone moisture, combatting Pluto's gravity. The seepage flow rates, isobars, isohumes, isotachs, flow nets, vector-fields of Darcian velocity and other kinematic-dynamic seepage descriptors are found for various combinations of the physical properties of two contrasting porous materials and geometrical sizes (the width and depth of Kornev's ditch, depth of its burial, distance between neighbouring emitting ditches in a periodic irrigation system).	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	: capillary fringe	ru_RU
dc.subject	tension-saturated seepage	ru_RU
dc.subject	complex potential	ru_RU
dc.subject	hodograph	ru_RU
dc.subject	conformal mappings	ru_RU
dc.subject	HYDRUS2D modeling of buried ditches as subsurface irrigators of constructozems	ru_RU
dc.title	Two-dimensional Capillarity-Driven Seepage From a Lined Buried Ditch: the Kornev Subsurface Irrigation “Absorptional” Method Revisited	ru_RU
dc.type	Articles in international journals and collections	ru_RU