Nutrient losses in surface irrigation runoff

Pérdida de nutrientes en deslave de irrigación superficial

Bjorneberg, D.L. and Westermann, D.T. and Aase, J.K. (2002) Nutrient losses in surface irrigation runoff. Journal of Soil and Water Conservation. 57:524-529.

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Abstract

Runoff from surface-irrigated fields is typically managed to improve infiltration
uniformity by reducing differences in infiltration opportunity times between the upper and lower
ends of fields. Runoff water not used on other fields within an irrigation tract is discharged to
streams or rivers, along with sediment and nutrients. Return flow nutrient and sediment
concentrations may be greater than in the diverted water, but the total sediment and nutrient
mass returned may be less if most of the diverted water infiltrates within the irrigation tract.
Controlling erosion reduces total phosphorus loss, because total phosphorus concentration
relates directly to sediment concentration. On-farm management practices, such as
polyacrylamide (PAM) application and conservation tillage, reduce erosion from fields, while
sediment ponds in the field or on return-flow streams trap suspended sediment that is not
controlled by on-farm practices. Surface irrigation return-flow water quality can be improved with
an organized effort using a combination of practices.

Item Type:	Article
NWISRL Publication Number:	1088
Subjects:	Irrigation > Furrow irrigation > Runoff losses > Nutrients Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:50
Last Modified:	09 Nov 2016 18:16
Item ID:	146
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/146