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This article in JEQ

  1. Vol. 30 No. 5, p. 1528-1532
     
    Received: Dec 4, 2000


    * Corresponding author(s): kbarbari@agsci.colostate.edu
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doi:10.2134/jeq2001.3051528x

Biosolids Applications Affect Runoff Water Quality following Forest Fire

  1. V. F. Meyera,
  2. E. F. Redentea,
  3. K. A. Barbarick *b and
  4. R. Brobstc
  1. a Dep. of Rangeland Ecosystem Science, Colorado State Univ., Fort Collins, CO 80523
    b Dep. of Soil and Crop Sciences, Colorado State Univ., Fort Collins, CO 80523
    c U.S. Environmental Protection Agency Region 8, Denver, CO 80202

Abstract

Soil erosion and nutrient losses are great concerns following forest wildfires. Biosolids application might enhance revegetation efforts while reducing soil erodibility. Consequently, we applied Denver Metro Wastewater District composted biosolids at rates of 0, 40, and 80 Mg ha−1 to a severely burned, previously forested site near Buffalo Creek, CO to increase plant cover and growth. Soils were classified as Ustorthents, Ustochrepts, and Haploborols. Simulated rainfall was applied for 30 min at a rate of 100 mm h−1 to 3- × 10-m paired plots. Biosolids application rates did not significantly affect mean total runoff (p < 0.05). Sediment concentrations were significantly greater (p < 0.05) from the control plots compared with the plots that had received the 80 Mg biosolids ha−1 rate. Biosolids application rate had mixed effects on water-quality constituents; however, concentrations of all runoff constituents for all treatment rates were below levels recommended for drinking water standards, except Pb. Biosolids application to this site increased plant cover, which should provide erosion control.

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Copyright © 2001. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyPublished in J. Environ. Qual.30:1528–1532.