Modeling Water Demands of Irrigation Projects
Publication: Journal of Irrigation and Drainage Engineering
Volume 109, Issue 4
Abstract
A simulation model for assessing the water demands of large irrigation areas is developed and applied to the mid‐Canterbury region of New Zealand. Observations from historical water use patterns provide a basis for demand modeling using simplified irrigation watering strategies, highlighting climatic time variability as the single most important influencing factor. Per unit area irrigation demands are first estimated for each identified unique combination of soil, crop type and irrigation strategy using daily soil moisture balance simulation over a number of seasons of recorded climate data. These are then combined using crop areas and efficiency weights to give time patterns of areallyaggregated water demand. The model is checked against field trial data, calibrated against water use in an existing irrigation scheme, and applied to demand estimation for a large proposed future project.
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References
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 109 • Issue 4 • December 1983
Pages: 405 - 418
Copyright
Copyright © 1983 ASCE.
History
Published online: Dec 1, 1983
Published in print: Dec 1983
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