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Agricultural Practices Influence Flow Regimes of Headwater Streams in Western Iowa

Dates

Year
2004

Citation

Tomer, M. D., Meek, D. W., and Kramer, L. A., 2004, Agricultural Practices Influence Flow Regimes of Headwater Streams in Western Iowa: J. Environ. Qual., v. 34, no. 5, p. 1547-1558.

Summary

Agricultural tillage influences runoff and infiltration, but consequent effects on watershed hydrology are poorly documented. This study evaluated 25 yr (1971–1995) hydrologic records from four first-order watersheds in Iowa's loess hills. Two watersheds were under conventional tillage and two were under conservation (ridge) tillage, one of which was terraced. All four watersheds grew corn (Zea mays L.) every year. Flow-frequency statistics and autoregressive modeling were used to determine how conservation treatments influenced stream hydrology. The autoregressive modeling characterized variations in discharge, baseflow, and runoff at multi-year, annual, and shorter time scales. The ridge-tilled watershed (nonterraced) had 47% less [...]

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  • National and Regional Climate Adaptation Science Centers
  • Northeast CASC

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Type Scheme Key
DOI http://sciencebase.gov/vocab/identifierScheme 10.2134/jeq2004.0199

Citation Extension

citationTypeJournal Article
journalJ. Environ. Qual.
parts
typePages
value1547-1558
typeVolume
value34
typeNumber
value5

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