Use of field and laboratory methods for estimating unsaturated hydraulic properties under different land-use

Autor: S. Siltecho, C. Hammecker, V. Sriboonlue, C. Clermont-Dauphin, V. Trelo-ges, A. C. D. Antonino, R. Angulo-Jaramillo
Přispěvatelé: Department of Plant Science and Land Resource, Faculty of Agriculture [Khon Kaen University], Khon Kaen University [Thailand] (KKU)-Khon Kaen University [Thailand] (KKU), Ground Water Research Center, Khon Kaen University [Thailand] (KKU), Land Development Regional Office no.5, Ministry of Agriculture, Ministry of Agriculture-Ministry of Agriculture, Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Faculty of Engineering, Centro de Tecnologias, Departamento de Energia Nuclear, Universiadade Federal do Pernambuco, Impacts des Polluants sur les Écosystèmes, Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS), Faculty of Agriculture, Khon Kaen University, Faculty of Agriculture, Khon Kaen University-Faculty of Agriculture, Khon Kaen University, Khon Kaen University, Institut de recherche pour le développement [IRD] : UMR210, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Hydrology and Earth System Sciences
Hydrology and Earth System Sciences, European Geosciences Union, 2014, 11, pp.6099-6137. ⟨10.5194/hessd-11-6099-2014⟩
ISSN: 1027-5606
1607-7938
DOI: 10.5194/hessd-11-6099-2014⟩
Popis: Adequate water management is required to improve the efficiency and sustainability of agricultural systems when water is scarce or over-abundant, especially in the case of land-use changes. In order to quantify, to predict and eventually to control water and solute transport into soil, soil hydraulic properties need to be determined precisely. As their determination is often tedious, expensive and time-consuming, many alternative field and laboratory techniques are now available. The aim of this study was to determine unsaturated soil hydraulic properties under different land-uses and to compare the results obtained with different measurement methods (Beerkan, Disk infiltrometer, Evaporation, pedotransfer function). The study has been realised on a tropical sandy soil in a mini watershed in NE Thailand. The experimental plots were positioned in a rubber tree plantation in different positions along a slope, in ruzi grass pasture and in an original forest site. Non parametric statistics demonstrated that van Genuchten unsaturated soil parameters (Ks, α and n), were significantly different according to the measurement methods employed whereas location was not a significant discriminating factor when all methods were considered together. However within each method, parameters n and α were statistically different according to the sites. These parameters were used with Hydrus1D for a one year simulation and computed pressure head did not show noticeable differences for the various sets of parameters, highlighting the fact that for modelling, any of these measurement method could be employed. The choice of the measurement method would therefore be motivated by the simplicity, robustness and its low cost.
Databáze: OpenAIRE
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