Multiple polyacrylamide applications for controlling sprinkler irrigation runoff and erosion

APLICACIONES MULTIPLES DE POLIACRILAMIDO PARA CONTROLAR EL DESLAVE Y LA EROSION POR IRRIGACION POR ASPERSION

Bjorneberg, D.L. and Aase, J.K. (2000) Multiple polyacrylamide applications for controlling sprinkler irrigation runoff and erosion. Applied Engineering in Agriculture. 16(5):501-504.

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Abstract

Runoff under sprinkler irrigation systems causes soil erosion and reduces water infiltration uniformity.
Previous studies have shown that applying polyacrylamide (PAM) with irrigation water can reduce runoff and soil loss.
We hypothesized that applying PAM with three consecutive irrigations would more effectively control runoff and erosion
than applying the same total amount of PAM with a single irrigation. This study was conducted in the laboratory with a
Rad silt loam (coarse silty, mixed, superactive mesic Durinodic Xeric Haplocambid) at 6.5% slope. Water was applied at
80 mm h- 1 (3.2 in. h-1 ) for 10 min [13 mm (0.5 in.) application depth] for four irrigations. PAM was applied at 3 kg ha-1
(2.7 lb a-1 ) with irrigation water during the initial irrigation (single) or at 1 kg ha- 1 (0.9 lb a-1 ) during the first three
irrigations (multiple). Both multiple and single PAM treatments caused significantly less runoff than the control for all
four irrigations. However, the multiple PAM treatment reduced runoff approximately 30% more than the single
application during the last two irrigations. Applying PAM at 3 kg ha-1 (2.7 lb a-1 ) with one irrigation reduced cumulative
soil loss by 60% compared to the control. Applying PAM at the same rate in three consecutive irrigations reduced
cumulative soil loss by 80%. Both single and multiple PAM applications reduced runoff and soil loss, but multiple
applications more effectively controlled runoff longer than a single application.

Item Type:	Article
NWISRL Publication Number:	1020
Subjects:	Irrigation > Furrow irrigation > Erosion > Polyacrylamide Irrigation > Furrow irrigation > Runoff losses Irrigation > Sprinkler irrigation Polyacrylamide (PAM) > Water-soluble PAM (WSPAM) > Application Strategies Polyacrylamide (PAM) > Water-soluble PAM (WSPAM) > Erosion control Polyacrylamide (PAM) > Water-soluble PAM (WSPAM) > Runoff Soil > Erosion Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:50
Last Modified:	15 Nov 2016 15:28
Item ID:	109
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/109