Infiltration parameters from optimisation on furrow irrigation advance data |
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Authors: | D J McClymont R J Smith |
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Institution: | (1) National Centre for Engineering in Agriculture, University of Southern Queensland, Toowoomba, Queensland, 4350, Australia, AU |
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Abstract: | Knowledge of the soil infiltration parameters is necessary for efficient furrow irrigation. A method is proposed for the
determination of the parameters in the Kostiakov-Lewis infiltration equation from measurements of the furrow irrigation advance
and inflow. The method employs a volume balance model using optimisation to minimise the error between the predicted and measured
advance and differs from existing approaches in that only advance data and inflow rates are required. The average cross sectional
area of the furrow and the final infiltration rate are treated as fitted parameters and need not be measured. A simple but
effective optimisation algorithm is developed which allows for the solution of the four parameters without user input. The
speed and simplicity of the optimisation may lead to application in real-time control of furrow irrigation.
Received: 16 August 1995 |
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