Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 506085
Title A framework for sourcing of evaporation between saturated and unsaturated zone in bare soil condition
Author(s) Balugani, E.; Lubczynski, M.W.; Metselaar, Klaas
Source Hydrological Sciences Journal 61 (2016)11. - ISSN 0262-6667 - p. 1981 - 1995.
DOI https://doi.org/10.1080/02626667.2014.966718
Department(s) Soil Physics and Land Management
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) evaporation - ground water balance - HYDRUS - liquid and vapour flow - sourcing
Abstract

Sourcing subsurface evaporation (Ess) into groundwater (Eg) and unsaturated zone (Eu) components has received little scientific attention so far, despite its importance in water management and agriculture. We propose a novel sourcing framework, with its implementation in dedicated post-processing software called SOURCE (used along with the HYDRUS1D model), to study evaporation sourcing dynamics, define quantitatively “shallow” and “deep” water table conditions and test the applicability of water table fluctuation (WTF) and “bucket” methods for estimation of Eg and Eu separately. For the “shallow” and “deep” water table we propose Eg > 0.95Ess and Eg = 0 criteria, respectively. Assessment of the WTF method allowed sourcing of very small fluxes otherwise neglected by standard hydrological methods. Sourcing with SOURCE software was more accurate than the standard “bucket” method mainly because of greater flexibility in spatio-temporal discretization. This study emphasized the dry condition relevance of groundwater evaporation which should be analysed by applying coupled flow of heat, vapour and liquid water.

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