Flow velocity and wetted perimeter effects on furrow infiltration

Trout, T.J. (1992) Flow velocity and wetted perimeter effects on furrow infiltration. Transactions of the ASAE. 35(3):855-863.

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Abstract

Infiltration theory and previous studies show that furrow infiltration increases with wetted perimeter. This effect can strongly influence water distribution along furrows. Stagnant blocked-furrow measurements on Portneuf silt loam soil supported this relationship. However, both recirculating infiltrometer and field-scale measurements showed no consistent infiltration:wetted perimeter relationship. The infiltrometer data, collected using a wide range of flow rates on a wide range of slopes, did show infiltration inversely related to flow velocity. This relationship results from the effect of flow on soil aggregate breakdown, particle movement, and depositional seal formation. Because both velocity and wetted perimeter increase with flow rate, their opposing effects on infiltration can result in little apparent effect when flow rates change. These interactions strengthen the inverse relationship between infiltration and furrow slope.

Item Type: Article
NWISRL Publication Number: 0776
Subjects: Irrigation > Furrow irrigation > Infiltration
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:53
Last Modified: 01 Dec 2016 22:39
Item ID: 581
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/581

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