Skip to main content
Article
Contributing Area and Concentration Effects on Herbicide Removal by Vegetative Buffer Strips
Transactions of the ASAE
  • Akhilesh Kumar Misra, Iowa State University
  • James L. Baker, Iowa State University
  • Steven K. Mickelson, Iowa State University
  • Hulan Shang, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
1-1-1996
Abstract
Deteriorated water quality due to nonpoint source pollution from herbicides is one of the environmental problems receiving attention this decade. One off-site best management practice (BMP) being suggested to improve water quality is vegetative buffer strips. This study was conducted on a Storden loam soil, under simulated rainfall (6.35 cm/h), to determine the effects of nominal inflow concentration (0.1 and 1.0 mg/L) and the ratio of drainage area to vegetated buffer strip area (simulated to be 15:1 and 30:1) on the efficiency of vegetative buffer strips (12.2 m long) in removing herbicides dissolved in runoff water. Four treatments (2 ¥ 2 factorial) replicated three times were included in the study. Three inflow samples (each integrated over 15 min) and nine outflow samples (each integrated over 5 min) were collected from each plot and analyzed for three herbicides. Reductions of 41, 39, and 38% from plots having a relative area ratio of 15:1, and 37, 35, and 34% from plots having a relative area ratio of 30:1 were measured, respectively, for atrazine, metolachlor, and cyanazine. Although the percentage of removal decreased for the larger area ratios for each herbicide, the decreases were not significant. Reductions of 29, 30, and 28% from plots having 0.1 mg/L nominal inflow concentration, and 49, 44, and 45% from plots having 1.0 mg/L nominal inflow concentration were measured, respectively, for atrazine, metolachlor, and cyanazine. The differences between reductions for the nominal inflow concentrations were significant. Using a bromide tracer, it was determined that the major factor in reduction of herbicide transport was infiltration of inflow into the vegetative buffer strips.
Comments

This article is from Transactions of the ASAE, 39, no. 6 (1996): 2105–2111.

Journal Paper No. J-16319 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa, Project No. 2934. The mention of firm names or trade products does not imply that they are endorsed or recommended by Iowa State University over other firms or similar products not mentioned.

Copyright Owner
American Society of Agricultural and Biological Engineers
Language
en
File Format
application/pdf
Citation Information
Akhilesh Kumar Misra, James L. Baker, Steven K. Mickelson and Hulan Shang. "Contributing Area and Concentration Effects on Herbicide Removal by Vegetative Buffer Strips" Transactions of the ASAE Vol. 39 Iss. 6 (1996) p. 2105 - 2111
Available at: http://works.bepress.com/steven_mickelson/8/