Model to support the evaluation of the impact of the use and management of the soil on the water balance

Model to support the evaluation of the impact of the use and management of the soil on the water balance

The purpose of this work was to develop a hydrological model for the simulation of the water balance in agricultural areas. The model uses a double exponential equation to represent the rainfall profile and uses the Green-Ampt-Mein-Larson equation to estimate the soil water infiltration rate. To eva...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy Vol. 34; no. 4; pp. 359 - 368
Main Authors: Mello, E.L. de, Pruski, F.F, Bertol, I, Costa, L.M, Menezes, G.G, Rodrigues, N.C
Format: Journal Article
Language:English
Published: Editora da Universidade Estadual de Maringá - EDUEM 01-10-2012
Subjects:
AEROSION HYDRIQUE
AGRONOMY
CULTIVO DO SOLO
ENGENHARIA HIDRÁULICA
EROSIA³N POR EL AGUA
EROSÃO HÍDRICA
GA©NIE HYDRAULIQUE
http://www.fao.org/aos/agrovoc#c_26789
http://www.fao.org/aos/agrovoc#c_3713
http://www.fao.org/aos/agrovoc#c_7771
http://www.fao.org/aos/agrovoc#c_8318
HYDRAULIC ENGINEERING
INFILTRACIA³N
INFILTRATION
INFILTRAÇÃO
INGENIERA­A HIDRAIULICA
LABRANZA
TILLAGE
TRAVAIL DU SOL
WATER EROSION
infiltração
hydrological modeling
modelo hidrológico
runoff
escoamento superficial
erosão hídrica
infiltration
water erosion
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Summary:The purpose of this work was to develop a hydrological model for the simulation of the water balance in agricultural areas. The model uses a double exponential equation to represent the rainfall profile and uses the Green-Ampt-Mein-Larson equation to estimate the soil water infiltration rate. To evaluate the model, monthly and yearly rainfall and runoff data were obtained from four experimental plots located at the State University of Santa Catarina, UDESC, in the period from 2003 to 2008. The four treatments were bare soil (BS), conventional tillage (CT), minimum tillage (MT) and no-tillage (NT). The simulation was carried out using two synthetic rainfall series, one adjusted on a monthly basis (SAMB) and the other adjusted on a daily basis (SADB). The parameters for the Green-Amp equation modified by Mein-Larson (GAML) were adjusted, and the best combination was found to be the replacement of the saturated hydraulic conductivity (K) by the constant infiltration rate (fc) and the estimation of the wetting front head pressure as a function of the hydraulic conductivity in the saturation zone (ψ(Kw)). There was not a significant difference between the observed annual mean runoff and the annual mean runoff estimated by the model.
Bibliography:F07
2013001839
N01
ISSN:1679-9275
1807-8621
1807-8621
DOI:10.4025/actasciagron.v34i4.14733