KFU. Card publication. Analytical and HYDRUS2D Modeling for Buried Peat-filled Trapezoidal Ditches as Subsurface Capillarity-Driven Irrigating Units

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ANALYTICAL AND HYDRUS2D MODELING FOR BURIED PEAT-FILLED TRAPEZOIDAL DITCHES AS SUBSURFACE CAPILLARITY-DRIVEN IRRIGATING UNITS

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

Analytical and HYDRUS2D Modeling for Buried Peat-filled Trapezoidal Ditches as Subsurface Capillarity-Driven Irrigating Units. / Anvar Kacimov, Yurii Obnosov, Tatyana Nikonenkova, Andrey Smagin. // Modeling Earth Systems and Environment 11(2). — DOI: 10.1007/s40808-025-02301-6 (IF=4.27, Q1-Q2).

Annotation

Intelligent design and construction of urban and agricultural soils (“constructozems”), as porous substrates on which strips of green vegetation are cultivated, aims at optimizing the plants' soil moisture consumption (high WUE). A lens (or double-periodic cluster of lenses) made of peat or other relatively coarse material is buried under the ground surface. This lens(es) is surrounded by a fine-textured indigenous soil. The pore water motion to/from the lens, acting intermittently as a draining entity (collecting pore water from the ambient soil) and a subsurface irrigator (emitting water to this soil), in such an engineered smartly-heterogenized vadose zone becomes essentially 2-D. Kornev (1935) experimented with backfilled ditches generating capillarity-maintained “wet bulbs”. The emitter-emanated “bulbes” targeted the roots of row crops in arid/semiarid regions. In the context of Kornev's subirrigation we complete Vedernikov's (1940) analytical solution for steady 2-D seepage from a trapezoidal ditch having a zero-depth water level. The free boundaries of the capillary fringe are found as streamlines and special isobars (the Vedernikov-Bouwer model). The deep percolation flow rate is evaluated by considering an analytical element (Strack, 1989) with a line source (ditch bed) and sink at infinity, i.e. a generalized “dipole”. For this purpose, the complex potential half-strip is conformally mapped onto a circular polygon in the hodograph plane. The isohumes, isotachs, isobars and other kinematic/dynamic descriptors of seepage are determined from the integral representation for characteristic holomorphic functions. With the help of HYDRUS2D, we also model a transient seepage in a homogeneous natural soil, as well as in “constructozems” made of such soil with a buried engineered coarse-texture lens. Free drainage (deep percolation) versus evaporation (ascending flux) from a dry soil surface are concatenated via a separatrix (with a stagnation point on the mid-segment between two neighbouring ditches) inside a polygonal HYDRUS flow domain where the Richards-Richardson equation is solved.

Keywords

subsurface capillarity-driven irrigation by ditch with coarse backfilling, complex potential and hodograph domains, conformal mappings, HYDRUS2D modeling

The name of the journal

Modeling Earth Systems and Environment

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/185099/KacObNikSm.pdf?sequence=1&isAllowed=y

URL

https://doi.org/ 10.1007/s40808-025-02301-6

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

https://repository.kpfu.ru/eng/?p_id=310622&p_lang=2

Resource files

File name	Size (MB)	Format
KacObNikSm.pdf	0,89	pdf	show / download

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	Analytical and HYDRUS2D Modeling for Buried Peat-filled Trapezoidal Ditches as Subsurface Capillarity-Driven Irrigating Units. / Anvar Kacimov, Yurii Obnosov, Tatyana Nikonenkova, Andrey Smagin. // Modeling Earth Systems and Environment 11(2). — DOI: 10.1007/s40808-025-02301-6 (IF=4.27, Q1-Q2).	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=310622&p_lang=2	ru_RU
dc.description.abstract	Modeling Earth Systems and Environment	ru_RU
dc.description.abstract	Intelligent design and construction of urban and agricultural soils (“constructozems”), as porous substrates on which strips of green vegetation are cultivated, aims at optimizing the plants' soil moisture consumption (high WUE). A lens (or double-periodic cluster of lenses) made of peat or other relatively coarse material is buried under the ground surface. This lens(es) is surrounded by a fine-textured indigenous soil. The pore water motion to/from the lens, acting intermittently as a draining entity (collecting pore water from the ambient soil) and a subsurface irrigator (emitting water to this soil), in such an engineered smartly-heterogenized vadose zone becomes essentially 2-D. Kornev (1935) experimented with backfilled ditches generating capillarity-maintained “wet bulbs”. The emitter-emanated “bulbes” targeted the roots of row crops in arid/semiarid regions. In the context of Kornev's subirrigation we complete Vedernikov's (1940) analytical solution for steady 2-D seepage from a trapezoidal ditch having a zero-depth water level. The free boundaries of the capillary fringe are found as streamlines and special isobars (the Vedernikov-Bouwer model). The deep percolation flow rate is evaluated by considering an analytical element (Strack, 1989) with a line source (ditch bed) and sink at infinity, i.e. a generalized “dipole”. For this purpose, the complex potential half-strip is conformally mapped onto a circular polygon in the hodograph plane. The isohumes, isotachs, isobars and other kinematic/dynamic descriptors of seepage are determined from the integral representation for characteristic holomorphic functions. With the help of HYDRUS2D, we also model a transient seepage in a homogeneous natural soil, as well as in “constructozems” made of such soil with a buried engineered coarse-texture lens. Free drainage (deep percolation) versus evaporation (ascending flux) from a dry soil surface are concatenated via a separatrix (with a stagnation point on the mid-segment between two neighbouring ditches) inside a polygonal HYDRUS flow domain where the Richards-Richardson equation is solved.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	subsurface capillarity-driven irrigation by ditch with coarse backfilling	ru_RU
dc.subject	complex potential and hodograph domains	ru_RU
dc.subject	conformal mappings	ru_RU
dc.subject	HYDRUS2D modeling	ru_RU
dc.title	Analytical and HYDRUS2D Modeling for Buried Peat-filled Trapezoidal Ditches as Subsurface Capillarity-Driven Irrigating Units	ru_RU
dc.type	Articles in international journals and collections	ru_RU