KFU. Card publication. Minimal Evaporation by Optimal Layering of Topsoil: Revisitng Ovsinsky's Smart Mulching-Tillage Technology via Gardner-Warrick's Unsaturated Analytical Model and HYDRUS

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MINIMAL EVAPORATION BY OPTIMAL LAYERING OF TOPSOIL: REVISITNG OVSINSKY'S SMART MULCHING-TILLAGE TECHNOLOGY VIA GARDNER-WARRICK'S UNSATURATED ANALYTICAL MODEL AND HYDRUS

Form of presentation

Articles in international journals and collections

Year of publication

2019

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Authors, employees of KFU

Obnosov Yuriy Viktorovich, author

Other authors

Kacimov Anvar Rashidovich, author

Šimůnek Jirka , author

Bibliographic description in the original language

A. R. Kacimov, Yu. V. Obnosov and J. Šimůnek. Minimizing Evaporation by Optimal Layering of Topsoil: Revisiting Ovsinsky's Smart Mulching‐Tillage Technology Via Gardner‐Warrick's Unsaturated Analytical Model and HYDRUS. WRR (Wiley), 2019, 55(5), p. 3606-3618. DOI: 10.1029/2018WR024025

Annotation

Ovsinsky (1899) suggested and tested a water conserving soil no-till technology for rain-snow-fed field crops in a semi-arid environment in southern Russia. We model Ovsynsky's unsaturated flow fragment, in which 1-D steady evaporation and evapotranspiration through a two-layered soil from a horizontal static water table to a dry soil surface takes place. Gardner's exponential and algebraic functions are used for the unsaturated hydraulic conductivity–suction head relations. The vertical evaporation flux depends on the diads and triads (correspondingly) of the parameters of these functions, e.g., the saturated hydraulic conductivity and the sorptive number of the two layers. The flux, as a function of the relative thickness of the upper stratum, is analytically found from the solution of one or two nonlinear equations. This relation can be non-monotonic and exhibits either a minimum or maximum depending on whether this stratum is coarser or finer than the subjacent stratum fed from a horizontal isobar. HYDRUS-1D simulations confirm these extrema. This explains the experimental results from the literature on mulching/tillage/soil crusting-sealing, which can increase, decrease or have no impact on evaporation from a shallow water table. Alterations of the soil's homogeneity to reduce evaporation losses can improve the hydrological balance of soil profiles.

Keywords

Gardnerian unsaturated conductivity; steady evapotranspiration from a water table, two-layered soils; HYDRUS simulations

The name of the journal

WATER RESOUR RES

URL

http://doi.org/10.1029/2018WR024025

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

https://repository.kpfu.ru/eng/?p_id=198443&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Obnosov Yuriy Viktorovich	ru_RU
dc.contributor.author	Kacimov Anvar Rashidovich	ru_RU
dc.contributor.author	Šimůnek Jirka	ru_RU
dc.date.accessioned	2019-01-01T00:00:00Z	ru_RU
dc.date.available	2019-01-01T00:00:00Z	ru_RU
dc.date.issued	2019	ru_RU
dc.identifier.citation	A. R. Kacimov, Yu. V. Obnosov and J. Šimůnek. Minimizing Evaporation by Optimal Layering of Topsoil: Revisiting Ovsinsky's Smart Mulching‐Tillage Technology Via Gardner‐Warrick's Unsaturated Analytical Model and HYDRUS. WRR (Wiley), 2019, 55(5), p. 3606-3618. DOI: 10.1029/2018WR024025	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=198443&p_lang=2	ru_RU
dc.description.abstract	WATER RESOUR RES	ru_RU
dc.description.abstract	Ovsinsky (1899) suggested and tested a water conserving soil no-till technology for rain-snow-fed field crops in a semi-arid environment in southern Russia. We model Ovsynsky's unsaturated flow fragment, in which 1-D steady evaporation and evapotranspiration through a two-layered soil from a horizontal static water table to a dry soil surface takes place. Gardner's exponential and algebraic functions are used for the unsaturated hydraulic conductivity–suction head relations. The vertical evaporation flux depends on the diads and triads (correspondingly) of the parameters of these functions, e.g., the saturated hydraulic conductivity and the sorptive number of the two layers. The flux, as a function of the relative thickness of the upper stratum, is analytically found from the solution of one or two nonlinear equations. This relation can be non-monotonic and exhibits either a minimum or maximum depending on whether this stratum is coarser or finer than the subjacent stratum fed from a horizontal isobar. HYDRUS-1D simulations confirm these extrema. This explains the experimental results from the literature on mulching/tillage/soil crusting-sealing, which can increase, decrease or have no impact on evaporation from a shallow water table. Alterations of the soil's homogeneity to reduce evaporation losses can improve the hydrological balance of soil profiles.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Gardnerian unsaturated conductivity; steady evapotranspiration from a water table	ru_RU
dc.subject	two-layered soils; HYDRUS simulations	ru_RU
dc.title	Minimal Evaporation by Optimal Layering of Topsoil: Revisitng Ovsinsky's Smart Mulching-Tillage Technology via Gardner-Warrick's Unsaturated Analytical Model and HYDRUS	ru_RU
dc.type	Articles in international journals and collections	ru_RU