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Impact of Thickness of Sand Capping on Phosphorus Release Rate from Sediment  

Jeong, Woo-Hyeok (Department of Civil and Environmental Engineering, Hannam University)
Kim, Geon-Ha (Department of Civil and Environmental Engineering, Hannam University)
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Abstract
This research was carried out to understand the impacts of thickness of sand capping to control phosphorus release from sediment into overlying water. As capping effectively retards release flux, phosphorus concentration in water body can be maintained if phosphorus release rate was kept under microbial degradation rate. With capping thickness increases, deaeration rate become less, while reaeration coefficient become higher. Phosphorus release rate and capping thickness were linearly correlated. The results of regression analysis indicated that phosphorus release can be controlled effectively by sand capping of least 20${\sim}$40 mm thickness.
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