Scientific Irrigation Scheduling for Salinity Control of Irrigation Return Flow

Jensen, Marvin E. (1977) Scientific Irrigation Scheduling for Salinity Control of Irrigation Return Flow. pp. 133-139. In: Proc. EPA Natl. Conf. Irrig. Return Flow Qual. Manage. USA-CO-Fort Collins, 1977/05/16-19.

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Abstract

Basic principles of irrigation water management
and irrigation scheduling are presented.
Commercial and agency groups expanded
rapidly in the 1970's providing field-by-field
scheduling services to over 600,000 acres in
1976.

The leaching fraction used on projects can
effect return flow quality. Most leaching fraction/return
flow models hypothetically assume
uniform water applications of exact quantities
to attain targeted leaching fractions. The
average or effective leaching fraction for a field
is dependent on the irrigation uniformity coefficient.
The effects of nonuniform water application
on average leaching fractions will be
presented, along with the probable effects of
expected improvements in irrigation efficiency
on return flow. Also, estimates of the accuracies
in estimating evapotranspiration and measuring
water will be presented. Substantial improvements
can be made in irrigation efficiencies
before minimum leaching fractions are
reached on most western irrigated projects.

Item Type:	Conference or Workshop Item (Paper)
NWISRL Publication Number:	0399
Additional Information:	Invited paper
Subjects:	Irrigation > Irrigation scheduling Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:56
Last Modified:	06 Feb 2017 17:14
Item ID:	1004
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1004