Using infiltration enhancement and soil water management to reduce diazinon in runoff.
Joyce-BA; Wallender-WW; Angermann-T; Wilson-BW; Werner-I; Oliver-MN; Zalom-FG; Henderson-JD
J Am Water Resourc Assoc 2004 Aug; 40(4):1063-1070
Pesticide runoff from dormant sprayed orchards is a major water quality problem in California's Central Valley. During the past several years, diazinon levels in the Sacramento and San Joaquin Rivers have exceeded water quality criteria for aquatic organisms. Orchard water management, via post-application irrigation, and infiltration enhancement, through the use of a vegetative ground cover, are management practices that are believed to reduce pesticide loading to surface waters. Field experiments were conducted in Davis, California, to measure the effectiveness of these management practices in reducing the toxicity of storm water runoff. Treatments using a vegetative ground cover significantly reduced peak concentrations and cumulative pesticide mass in runoff for first flush experiments compared with bare soil treatments. Post-application irrigation was found to be an effective means of reducing peak concentrations and cumulative mass in runoff from bare soil treatments, but showed no significant effect on vegetated treatments.
Agricultural-chemicals; Agriculture; Pesticides; Pesticides-and-agricultural-chemicals; Vegetation; Crop-spraying; Water-analysis; Water-sampling; Toxic-effects; Toxic-vapors; Toxins; Trace-analysis; Soil-analysis; Soil-sampling
BA Joyce, Department of Animal Science; University of California-Davis, 1 Shields Avenue, Davis, CA 95616
Agriculture; Cooperative Agreement
Journal of the American Water Resources Association
University of California - Davis