Modelling percolation of water. Calibration and validation of CREAMS and LEACHW codes in differents soils and forage crops [Piedmont - Sardinia - Tuscany]

Acutis, M.; Cavallero, A.; Ducco, G.; Grignani, C.; Pardini, A. . Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio; Argenti, G.; Talamucci, P.; Zanchi, C. . Dipartimento di Agronomia e Produzioni Erbacee; Caredda, S. . Istituto di Agronomia Generale e Coltivazioni Erbacee; Fara, G.; Porqueddu, C.; Sulas, L. . Centro di Studio sui Pascoli Mediterranei

Modelling percolation of water. Calibration and validation of CREAMS and LEACHW codes in differents soils and forage crops [Piedmont - Sardinia - Tuscany]

1997

CREAMS (capacitance type approach) and LEACHW (Richard's equation approach) codes have been validated and calibrated in three Italian environments (Piedmont, Tuscany and Sardinia), using 4 types of soil ranging from sandy-loam to clay-loam. A set of large drainage lysimeters has been used to obtain percolation data. In all sites one lysimeter was cropped with lucerne, while the others were cropped with widespread crops in the area (maize for silage in Piedmont, double cropping (italian ryegrass-maize for grain) in Sardinia and permanent pasture in Tuscany and Sardinia). Measured percolation ranged from 100 to 300 mm y** (-1). Lysimeters cropped with lucerne were used for calibration and the others for validation. The parameters used for calibrating the models have been the field capacity for the CREAMS model and the values of a and b of the Campbell moisture-pressure relation for LEACHW. CREAMS model showed good performance only in calibration (RMSE 50 mm), but not in validation, LEACHW showed better performance in calibration as well as in validation (RMSE 30 mm). Using parameters estimated from other data more easily available (particle distribution size, bulk density and organic matter content), an acceptable simulation has been obtained only in Tuscany

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AGROVOC Keywords

agua del suelo eau du sol granulometria grosseur des particules lisimetri llanuras lolium multiflorum lysimeters mathematical models medicago sativa modelli matematici organic matter particle size piamonte pianure piedmont piemont piemonte plaine plains sardaigne sardegna sardinia soil micromorphological features soil types soil water sostanza organica tipi di suolo tipos de suelos toscana toscane trait micromorphologique du sol tuscany type de sol zea mays

Bibliographic information

Published in

Rivista di Agronomia (Italy)

Volume 31 Issue 1 ISSN 0035-6034

Pagination

pp. 33-41

Other Subjects

Matiere organique; Modele mathematique; Cerdena; Acqua del terreno; Modelos matematicos; Materia organica; Lisimetros; Tamano de la particula; Lysimetre; Caract micromorfologicas del suelo; Caratteri micromorfologici suolo

Language

Italian

Note

Summaries (En, It)

2 tables; 4 graphs; 25 ref.

Translated Title

Modellizzazione della percolazione profonda dell'acqua nel terreno. Calibrazione e validazione dei codici CREAMS e LEACHW in diversi suoli e colture foraggere [Piemonte - Sardegna - Toscana]

Type

Summary

In AGRIS since: 1998-08-15

Format: AGRIS AP

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Modelling percolation of water. Calibration and validation of CREAMS and LEACHW codes in differents soils and forage crops [Piedmont - Sardinia - Tuscany]

1997

AGROVOC Keywords

Bibliographic information