Submitted to: ASABE Annual International Meeting
Publication Type: Abstract Only
Publication Acceptance Date: May 23, 2006
Publication Date: June 9, 2006
Citation: Sadeghi, A.M., Sefton, K.A., Faucette, B. 2006. Evaluation of compost filter socks in sediment and nutrient reduction from runoff [abstract]. ASABE Annual International Meeting. Paper No. 062059.
Compost Filter Socks, used in a variety of sediment control and storm water management applications, are being used primarily to filter sediment and other potential pollutants in storm water runoff. The objective of this study was to evaluate flow through rates and sediment and nutrient removal or loss capability of these newly developed sediment control devices. Five experimental treatments were replicated in triplicate: three filter sock treatments, silt fence (24 in.) and control (no sediment control). The treatments were installed in large chambers (110 cm x 35 cm x 25 cm), to roughly simulate the field conditions, with 2 to 3 inches of silt loam soil. Chambers were adjusted on the rain simulated table to have a 10% slope. A rainfall simulation system was used to provide 3 inches/hour of rainfall intensity for 0.5 hr duration on the respective chamber treatments. Runoff samples were taken at the base of the soil chamber immediately after overland flow runoff passing through the treatment. Samples were quantified for turbidity, total solids, total N, ammonium N, nitrate + nitrite N, and total P and dissolved reactive P concentrations. Direct water balance measurements included total rainfall and total runoff. Flow rates from the filter socks averaged 50% greater than that of silt fence while total sediment concentrations in runoff were not diminished. Compost filter socks reduced total phosphorus in runoff relative to the bare soil, while one compost filter sock treatment reduced soluble reactive P by 50%.