The SDA model was developed in order to attend the design and agricultural drainage system management in humid and subhumid climate regions based on the drainage criteria known as the total amount of exceeding water on soil above 30 cm (SEW30) and has showed efficient for those climate conditions. This study aimed at accomplishing sensitivity analysis of SDA model, in order to verify the effect of the input parameters on the results obtained by application of the model. Simulations accomplished with the model showed to be very sensible to input parameters, showing high response to total daily precipitation, installation depth of drains, hydraulic conductivity of saturated soil and the reference evapotranspiration values.
Agricultural drainage; simulation model
