Titre :
|
Development and use of a database of hydraulic properties of European soils
|
Auteurs :
|
J. Wosten ;
A. Lilly ;
A. Nemes ;
C. Le Bas
|
Type de document :
|
article/chapitre/communication
|
Année de publication :
|
1999
|
Format :
|
p. 169-185
|
Langues:
|
= Anglais
|
Catégories :
|
SCIENCES FONDAMENTALES ET APPLIQUEES
|
Mots-clés:
|
EUROPE
;
PROPRIETE DU SOL
;
CARACTERISTIQUE HYDRODYNAMIQUE
;
BASE DE DONNEES
|
Résumé :
|
Many environmental studies on the protection of European soil and water resources make use of soil water simulation models. A major obstacle to the wider application of these models is the lack of easily accessible and representative soil hydraulic properties. In order to overcome this apparent lack of data, a project was initiated to bring together the available hydraulic data which resided within different institutions in Europe into one central database. This information was then used to derive a set of pedotransfer functions applicable to studies at a European scale. These pedotransfer functions predict the hydraulic properties from parameters collected during soil surveys and can be a good alternative for costly and time-consuming direct measurement of these properties. A total of 20 institutions from 12 European countries collaborated in establishing the database of HYdraulic PRoperties of European Soils (HYPRES). This database has a flexible relational structure capable of holding a wide diversity of both soil pedological and hydraulic data. As these data were contributed by 20 different institutions it was necessary to standardise both the particle-size and the hydraulic data. A novel similarity interpolation procedure was successfully used to achieve standardization of particle-sizes according to the FAO clay, silt and sand particle-size ranges. Standardization of hydraulic data was achieved by fitting the Mualem-van Genuchten model parameters to the individual theta(h) and K(h) hydraulic properties stored in HYPRES. The HYPRES database contains information on a total of 5521 soil horizons (including replicates).
|
Source :
|
Geoderma, vol.90
|