완충대 설치에 의한 농업용 배수로에서 인유출 저감

Abstract

An artificial buffer zone was developed to reduce the phosphorus runoff through the agricultural drainage canals. The buffer zone was composed oyster shells, gravels, and an acrylic treatment box. Oyster shells have a high concentration of Ca, Fe, and Al compound and could be used as the treatment material to reduce phosphorus runoff from the drainage canal. Oyster shells placed into the acrylic treatment box and capped with gravel to protect from outer shocks. After the field monitoring procedure to find experimental site, Parallel buffer zones were installed in the interval of 1.0m into the agricultural drainage canal and observed the effect of phosphorus reduction after the passage of runoff through buffer zones. As a result of monitoring, average 26 % (max. 58%) of reduction was observed and the effect of second buffer zone was better than first buffer zone. Therefore it is expected that the treatment effect could be improved with the time and multi-buffer zone which is installed parallel pattern should be installed to effectively reduce the phosphorus runoff form the agricultural drainage canals.