Test and calibration of soil moisture model for agricultural activities (MUSAG) [Ceara, semiarid region]
1998
Aguiar, Jose V. de (Universidad Federal do Ceara, Fortaleza (Brasil)) | Angelocci, Luiz Roberto | Folgatti, Marcos Vinicius | Silva P, Vital Pedro da
The objective of this paper was to determine the parameters of infiltration, percolation and evapotranspiration equations, of the Soil Moisture Model for Agricultural Activities', MUSAG, associated to the model. The maximum infiltration and the stabilized infiltration rate, were obtained as function of soil moisture and time. The soil water potential was determined using 8 batteries of tensiometers installed at 10, 30, 50, 70, 90 e 110 cm. The potential evapotranspiration was estimated by a Class A evaporation pan, and the parameters of evaporation equation as function of actual and saturated soil moisture. For all depths, except 40 cm, the t values were always below the tabulated values; thus, the MUSAG can be used to estimate soil water content, in soils and climate conditions similar to the experimental site
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