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dc.contributor.authorPeña-Sancho, Carolinaes_ES
dc.contributor.authorGhezzehei, Teamrat A.es_ES
dc.contributor.authorLatorre Garcés, Borjaes_ES
dc.contributor.authorMoret-Fernández, Davides_ES
dc.identifier.citationEGU General Assembly (2015)es_ES
dc.identifier.citationGeophysical Research Abstracts 17: EGU2015-6145 (2015)es_ES
dc.description.abstractThe determination of the water retention curve (WRC) parameters and the hydraulic conductivity (K) is of paramount importance in many scientific fields such as hydrology or environmental science. Their direct characterization, however, is typically cumbersome and time consuming. This work analyze the viability to estimate the α and n Van Genuchten (VG) WRC parameters and K from following processes: a capillary wetting process at saturation, an evaporation process and a capillary wetting at saturation followed by an evaporation process. The theoretical analysis was carried out on a 5 cm high and 5 cm diameter cylinder filled with loam soil using numerically generated data with the HYDRUS 2D code. The error maps for the above mentioned processes and the n-K, α-n and K-α planes were generated from the RMSE calculated between the original and the simulated cumulative curves. The deviation (%) between the optimal and original hydraulic parameters was also calculated. Results showed that the capillary plus evaporation method applied on the n-K and α-n planes was the unique process that allowed a unique and well defined minimum. For this last case, the deviation for the α and n parameter were 6’67 and 0’88%, respectively. Taking into account that K can be easy measured from the same soil cylinder by means of Darcy’s law, we conclude the capillary + evaporation process can be a simple and effective alternative to estimate the WRC parameters. To this end, the hysteresis phenomena due to the wetting-evaporation process should be taking into account.es_ES
dc.description.sponsorshipThis research was supported by the Ministerio de Ciencia e Innovación of Spain (Grant AGL2010-22050-C03-02).es_ES
dc.titleA theoretical analysis to estimate the hydraulic properties of a loam soil from a capillary-overpressure-evaporation process employing the HYDRUS 2D modeles_ES
dc.typepóster de congresoes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderMinisterio de Ciencia e Innovación (España)es_ES
Appears in Collections:(EEAD) Comunicaciones congresos
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