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| Bjorneberg, D.L.. |
| Water returning to a river from an irrigated watershed could increase the water temperature in the river. The objective of this study was to compare the temperature of irrigation return flow water with the temperature of the diverted irrigation water. Water temperature was measured weekly in the main irrigation canal, 24 return flow streams and one ephemeral stream from 2005 to 2008 in the Upper Snake Rock (USR) watershed. The USR is an 82,000 ha watershed in southern Idaho, USA with about 60% of the area surface irrigated and the remaining area sprinkler irrigated. Median annual water temperatures in irrigation return flow streams were not greater than the water diverted from the river, suggesting that water flowing through the canal system and furrow... |
| Tipo: Article |
Palavras-chave: Drainage water (see Percolation water); Water. |
| Ano: 2015 |
URL: http://eprints.nwisrl.ars.usda.gov/1594/1/1552.pdf |
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| Ippolito, J.A.; Nelson, N.O.. |
| Irrigation laterals transport irrigation return flow, including water, sediment, and dissolved nutrients, such as phosphorus (P), back to surface water bodies. Phosphorus transformations during transport can affect both P bioavailability and the best management practices selected to minimize P inputs to waters of the United States. The objective of this study was to determine P retention in three irrigation laterals. Soluble reactive P (SRP) concentrations in lateral waters were increased from 0.08 to 0.25 mg L -1 (0.08 to 0.25 ppm) by constantly injecting a phosphate (PO4) solution for 2.5 hours. Bromide (Br) was used as a conservative tracer to determine dilution effects. Water was sampled at 10-minute intervals, beginning 30... |
| Tipo: Article |
Palavras-chave: Drainage water (see Percolation water); Nutrients. |
| Ano: 2013 |
URL: http://eprints.nwisrl.ars.usda.gov/1513/1/1477.pdf |
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