Author(s): K. L. Khatri & R. J. Smith
A simple real-time control system for furrow irrigation is proposed that predicts
the infiltration characteristic of the soil in real time using data measured during
an irrigation event, simulates the irrigation and determines the optimum time to
cut-off for that irrigation.
The basis of the system is a new method for estimating
the soil infiltration characteristic under furrow irrigation, developed previously
by the authors, that uses a model infiltration curve, and a scaling process to
predict the infiltration characteristic for each furrow and each irrigation event.
Using this method, infiltration parameters were calculated for two different
The SIRMOD simulation model was then used to simulate irrigation
performance under different model strategies, framed to assess the feasibility of
the real time control strategy.
The simulation results showed that the system is
feasible and that the scaled infiltration is suitable for use in real-time control.
The results further indicated that under simple real time control the irrigation
performance for the two fields could be improved greatly with substantial
reductions in the total volume of water applied.
surface irrigation, real-time control, simulation, optimisation,
application efficiency, infiltration scaling.
The performance of surface irrigation is a function of the field design, infiltration
characteristic of the soil, and the irrigation management practice.
complexity of the interactions makes it difficult for irrigators to identify optimal
design or management practices.
The infiltration characteristic of the soil is the
Size: 354 kb
Paper DOI: 10.2495/SI060021
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This paper can be found in the following bookSustainable Irrigation Management, Technologies and PoliciesBuy