Data/hora: 02/06/2024 07:07:30

Provedor de dados: 	18	
País: 	United Kingdom	
Título: 	Center pivot simulator for evaluating system design and management effects on infiltration and erosion	
Autores: 	King, B.A.; Bjorneberg, D.L.	
Data: 	2007	
Ano: 	2007	
Palavras-chave: 	Erosion; Infiltration; Center pivot; Erosion; Mass Import - autoclassified (may be erroneous).	
Resumo: 	A 4-wheeled commercial irrigation boom was modified for use in investigating center pivot design and  management effects on infiltration, runoff and erosion of specific soil types. The center pivot simulator  used a hydraulic winch attached to the front of a tractor for mobilization and controlled travel speed. A 3  inch diameter 300 ft drag hose is used to supply water to the center pivot simulator. The center pivot  simulator was used to conduct two studies to investigate infiltration, runoff and erosion differences of  common commercially available center pivot sprinkler types on a Portneuf silt loam soil. Sprinklers used  in the first study were: 1) Nelson R3000 with brown plate, 2) Nelson R3000 with red plate, 3) Nelson  S3000 with purple plate, and 4) Senninger I-Wob with standard 9-groove plate. Measured runoff was  highly variable despite the controlled experimental conditions. Runoff from all sprinkler types increased  with number of irrigations indicating that soil surface sealing continued to increase without reaching a  maximum after five irrigations. Measured runoff tended to be the highest for the S3000 and I-Wob  sprinklers. Sediment loss tended to be highest for these sprinklers as well. The second study investigated  differences in runoff and erosion related to kinetic energy of sprinkler droplets from commercial center  pivot sprinklers. The sprinklers used in the study were: 1) Senninger I-Wob with standard 9-groove  plate, 2) Nelson R3000 with brown plate, 3)Nelson D3000 spray with flat plate and 4) sprinkler 3 with the  runoff plot covered with 20-mesh nylon window screen suspended about 1 inch above the soil surface to  eliminate sprinkler droplet impact on the bare soil surface. Covering the plot with screen to eliminate  sprinkler droplet impact resulted in significantly (p?0.05) less runoff and sediment loss for all four  irrigation events. The D3000 and I-Wob sprinklers tended to have the greatest runoff and sediment  losses. Sprinkler type and configuration had a significant (p?0.05) effect on runoff and erosion of a  Portneuf silt loam soil.	
Tipo: 	Conference or Workshop Item	
Idioma: 	Inglês	
Identificador: 	http://eprints.nwisrl.ars.usda.gov/965/1/1236.pdf

King, B.A. and Bjorneberg, D.L.  (2007) Center pivot simulator for evaluating system design and management effects on infiltration and erosion.  pp. 166-175.  In:  Proceedings of 28th Annual Irrigation Show.     USA-CA-San Diego, 2007/12/09-11.	
Relação: 	http://eprints.nwisrl.ars.usda.gov/965/

1236	
Formato: 	application/pdf