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| Registros recuperados: 30 | |
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| Bjorneberg, D.L.; Ippolito, J.A.; Koehn, A.C.. |
| Water, sediment and nutrients flowing into and out of the 82,000 ha Twin Falls,ID irrigation tract were measured from 2005 to 2008. Approximately 80% of the water flowing into the watershed was irrigation water diverted from the Snake River. About 40% of the watershed inflow returned to the Snake River. Much of this return flow was water from subsurface drain tiles and tunnels that drain shallow groundwater. Converting from furrow to sprinkler irrigation, improved irrigation management, and constructed sediment ponds have reduced sediment loss from 460 kg/ha in 1971 to <100 kg/ha in 2005. In 2007 and 2008, more sediment and phosphorus entered the watershed than returned to the Snake River. Diverting irrigation water into the watershed removed 6300 Mg of... |
| Tipo: Conference or Workshop Item |
Palavras-chave: Irrigation control; Runoff losses; Nutrient losses; Nutrients; Soil. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1571/1/1527.pdf |
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| Ippolito, J.A.; Spackman, R.; Entry, J.A.; Sojka, R.E.. |
| Phosphorus-containing sediment entering surface water may degrade water quality and promote eutrophication. Grass is sometimes planted as a vegetated filter strip buffer along vulnerable receiving water to trap sediment and reduce the severity of phosphorus nutrient loading. However, eutrophication is still a problem in some waterways due to dissolved phosphorus leaching from senesced vegetation in grassed areas, independent of trapped sediment. A rainfall simulator (96 mm/h) was used to study the vegetative conditions under which losses of total dissolved phosphorus and filterable reactive phosphorus leaching are likely. Boxes containing a Portneuf silt loam soil (Xeric Haplocalcid) were planted with annual ryegrass (Lolium perenne) and cut at two... |
| Tipo: Article |
Palavras-chave: Runoff losses; Phosphorous. |
| Ano: 2014 |
URL: http://eprints.nwisrl.ars.usda.gov/1545/1/1503.pdf |
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| King, B.A.; Bjorneberg, D.L.. |
| The operational characteristics of center pivot sprinklers are well documented but few studies have been conducted to evaluate the effects that operating characteristics of a particular sprinkler have on infiltration, runoff, and erosion for specific soil types. The objective of this study was to evaluate potential runoff and erosion from four commercial center pivot sprinklers on three widely distributed, south central Idaho soils. A modified commercial irrigation boom system was used to emulate center pivot irrigation on experimental runoff plots. Sprinklers used in the 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. Based on... |
| Tipo: Article |
Palavras-chave: Sprinkler irrigation; Erosion; Runoff losses; Center pivot. |
| Ano: 2011 |
URL: http://eprints.nwisrl.ars.usda.gov/1424/1/1394.pdf |
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| Registros recuperados: 30 | |
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