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Soil Column Experiment to Evaluate Removal of Nutrients in Stormwater Runoff by Soil of Riparian Protection Zone  

Yoon, Seok-Pyo (Department of Environmental Engineering, Semyung University)
Choi, Ji-Yong (Korea Environment Institute)
Publication Information
Journal of Korean Society on Water Environment / v.20, no.3, 2004 , pp. 231-235 More about this Journal
Abstract
To investigate removal effects of nutrients in stormwater runoff by soil of riparian protection zone, soil column experiment was conducted for 20 months. Artificial stormwater runoff containing phosphate and nitrate was applied on the surface of soil column twice a week, and phosphate and nitrate concentrations were measured from the leached water. Soil of riparian protection zone reduced the released amount of infiltrated water to the surrounding water. After infiltration of 1m depth of soil column, average removal rates of phosphate and nitrate were 97.7 % and 74.7 %, respectively. As main mechanisms of phosphate are adsorption to soil particle and utilization by plants, periodical replacement of soil and harvesting of plant at the end of growing season are required. For the removal of nutrients in stormwater runoff by the soil layer, soil of riparian protection zone has higher hydraulic conductivity to infiltrate stormwater. Sandy soil having hydraulic conductivity of about $1{\times}10^{-2}cm/s$ range might be appropriate for this purpose.
Keywords
Soil column; Riparian protection zone; Phosphate; Nitrate; Adsorption; Stormwater runoff;
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