High Frequency Basin Irrigation Design for Upland Crops in Rice Lands
Publication: Journal of Irrigation and Drainage Engineering
Volume 118, Issue 4
Abstract
Rice soils are generally characterized by heavy textures, poor structures, low porosities and permeabilities, shallow traffic pans, and slow rates of drainage. Crop growth and yields of upland (i.e., nonrice) crops in these soils are adversely affected because of restricted root aeration and development. Under these conditions, irrigation of nonrice crops poses serious problems because of the low air porosity and the tendency of the soil to waterlog. A high‐frequency basin irrigation method for nonrice crops in rice soils is developed. It is based on a computer solution of the Lewis and Milne surface irrigation volume balance equation by numerically inverting the Laplace transform of the equation. The method provides an optimum design for the alleviation of the soil‐related adverse effects while enabling a high application efficiency and uniformity. The method is field‐tested in three different fields, in which 0.330, 0.326, and 0.374 m of water are applied in 8, 7, and 10 low‐volume irrigations, respectively. Overall application efficiencies of 90.9%, 92.3%, and 93.6% are achieved, routinely exceeding the design application efficiency.
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Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 118 • Issue 4 • July 1992
Pages: 564 - 583
Copyright
Copyright © 1992 ASCE.
History
Published online: Jul 1, 1992
Published in print: Jul 1992
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