Development and simulation of sensor-based irrigation control strategies for cotton using the VARIwise simulation framework

McCarthy, Alison C. and Hancock, Nigel H. and Raine, Steven R. (2014) Development and simulation of sensor-based irrigation control strategies for cotton using the VARIwise simulation framework. Computers and Electronics in Agriculture, 101. pp. 148-162. ISSN 0168-1699

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Feedback control systems offer opportunities to accommodate spatial and temporal differences in crop water requirement and to improve the automated irrigation of field crops via real-time data from in-field plant, soil-water and evaporation sensing. This paper describes two sensor-based strategies applied to irrigation control, 'Iterative Learning Control' (ILC) and custom-designed 'Iterative Hill Climbing Control' (IHCC), implemented in the control simulation and evaluation framework 'VARIwise'. Simulation of an irrigated cotton crop using soils and merged 1999-2004 weather data of SE Queensland, Australia, and represented by the performance of the well-validated cotton growth and production model OZCOT, permitted the relative performance of differing sensor data types and availability to be evaluated (both as alternatives and in combination) in meeting the requirement to optimise either crop yield or water use efficiency. These simulations indicated that ILC would perform better at maintaining soil-water deficit, whilst IHCC would be better at maximising crop yield when plant and soil sensors were utilised in combination. This work demonstrates that the optimal choice of field sensor(s) and control strategy will be a function of the irrigation objective and the spatial and temporal availability and type of field measurements.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 Elsevier B.V. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 16 Feb 2014 01:51
Last Modified: 01 Feb 2017 04:27
Uncontrolled Keywords: variable-rate irrigation; centre pivot; lateral move; scheduling; automation; OZCOT; VARIwise
Fields of Research : 07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070103 Agricultural Production Systems Simulation
09 Engineering > 0906 Electrical and Electronic Engineering > 090602 Control Systems, Robotics and Automation
07 Agricultural and Veterinary Sciences > 0799 Other Agricultural and Veterinary Sciences > 079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8203 Industrial Crops > 820301 Cotton
Identification Number or DOI: 10.1016/j.compag.2013.12.014

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