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Minimizing Evaporation by Optimal Layering of Topsoil: Revisiting Ovsinsky's Smart Mulching-Tillage Technology Via Gardner-Warrick's Unsaturated Analytical Model and HYDRUS

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dc.contributor.author Kacimov A.
dc.contributor.author Obnosov Y.
dc.contributor.author Šimůnek J.
dc.date.accessioned 2020-01-21T20:35:33Z
dc.date.available 2020-01-21T20:35:33Z
dc.date.issued 2019
dc.identifier.issn 0043-1397
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/157448
dc.description.abstract ©2019. American Geophysical Union. All Rights Reserved. Ovsinsky (1899, https://www.rulit.me/books/novaya-sistema-zemledeliya-read-193251-1.html) suggested and tested a water conserving soil no-till technology for rain-snow-fed field crops in a semiarid 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 dyads and triads (correspondingly) of the parameters of these functions, for example, 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 nonmonotonic 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.
dc.relation.ispartofseries Water Resources Research
dc.subject Gardnerian unsaturated conductivity
dc.subject HYDRUS simulations
dc.subject steady evapotranspiration from a water table
dc.subject two-layered soils
dc.title Minimizing Evaporation by Optimal Layering of Topsoil: Revisiting Ovsinsky's Smart Mulching-Tillage Technology Via Gardner-Warrick's Unsaturated Analytical Model and HYDRUS
dc.type Article
dc.relation.ispartofseries-issue 5
dc.relation.ispartofseries-volume 55
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 3606
dc.source.id SCOPUS00431397-2019-55-5-SID85065406220


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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