Campus Units

Agricultural and Biosystems Engineering

Document Type

Conference Proceeding

Conference

2nd International Symposium on Preferential Flow Water: Movement and Chemical Transport in the Environment

Publication Version

Published Version

Publication Date

1-3-2001

Journal or Book Title

Proceedings of the 2nd International Symposium on Preferential Flow Water: Movement and Chemical Transport in the Environment

First Page

89

Last Page

92

DOI

10.13031/2013.2108

Conference Title

2nd International Symposium on Preferential Flow Water: Movement and Chemical Transport in the Environment

Conference Date

January 3-5, 2001

City

Honolulu, HI

Abstract

We conducted a sequential tracer leaching study on a field plot to investigate the temporal behavior of preferential flow to a field tile during an irrigation and subsequent rainfall events over a 14-d period. Two herbicides, along with the conservative tracer Br, were applied to a strip adjacent to a tile drain immediately before a 4.2-mm hr-1 irrigation. Three additional conservative fluoridated benzoates (PF, TF, and PF) were applied to the strip at 2-hr intervals during the irrigation. Breakthrough of the conservative tracer Br and the two herbicides occurred within the first 2-hr of irrigation, indicating that a small fraction of the solute moved through preferential flow paths. The last tracer (PF), applied 6 hr after the start of irrigation, took only 15 min and 1 mm of irrigation water to travel the 1.2-m distance between the soil surface and the tile. Thus, flow along preferential flow paths was faster during later stages of the irrigation. This study demonstrates that solute transport rates in preferential flow pathways is not a constant during a leaching event.

Comments

This proceeding is published as Jaynes, D.B., King-Jau S. Kung, S.I. Ahmed, and Ramesh S. Kanwar. "Temporal Dynamics of Preferential Flow to a Field Tile." In Proceedings of the 2nd International Symposium on Preferential Flow Water: Movement and Chemical Transport in the Environment, ASAE Publication Number 701P0006 (David Bosch and Kevin King, eds.). (2001): 89-92. DOI: 10.13031/2013.2108.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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