Phosphorus loss with surface irrigation

Bjorneberg, D.L. and Leytem, A.B. (2005) Phosphorus loss with surface irrigation. In: Walker, F. and Russell, W. and Dagnan, G. and Dalton, A. (eds.) Phosphorus Best Management Practices: Protecting Water Quality. USDA-NRCS Fact Sheet. Available: http://www.sera17.ext.vt.edu/SERA_17_Publications....

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Abstract

Definition:
Surface irrigation uses
gravity to deliver water
across the field, contrary
to sprinkler or drip irrigation
that uses pipe or tubing
as the conveyance system.
Water flows across the field
in small streams for furrow
irrigation or in a sheet for
border and basin irrigation.
Problem:
In some surface irrigation
systems, runoff is desirable
to improve the uniformity
of water infiltration between
the upper and lower
ends of the field. Containing
all runoff from sloping fields
(>1 percent) is also impractical.
During the irrigation
event, water flowing over
soil detaches, transports and
deposits sediment and nutrients
that are often attached
to sediment. Phosphorus (P)
can also desorb from the
soil and transported sediment,
increasing soluble P
in surface irrigation runoff.
Therefore, there are two
main mechanisms that influence
P transport in these
systems: erosion and desorption
of P into runoff water.

Item Type:	Technical Bulletin
NWISRL Publication Number:	1156
Subjects:	Irrigation > Furrow irrigation > Runoff losses > Nutrients Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:58
Last Modified:	25 Oct 2016 18:10
Item ID:	1203
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/1203