구제역 가축매몰지 인근 지하수 관측정 수질 모니터링

Abstract

Objectives: The purpose of this study is to evaluate the characteristics of leachate discharged from livestockburial sites in Gangwondo resulting from foot-and-mouth disease by monitoring the water quality at the surveytube-wells installed near livestock burial sites in order to investigate the effect of the leachate on the quality ofnearby underground water and suggest a water pollution level in accordance with water quality evaluationcriteria. Methods: To minimize the secondary environmental pollution damage caused by leachate at burial sites oflivestock killed by foot-and-mouth disease, this study analyzed the leachate directly discharged from burial sitesand installed survey tube-wells within 300 meters of livestock burial sites and investigated water quality as ameans to ascertain the environmental effect of the leachate from the burial sites. In accordance withenvironmental management guidelines on livestock burial sites, this research investigated the water quality in thesurvey tube-wells in fifty five burial sites in Gangwondo. The elements investigated were NH3-N, Cl−, NO3-N,conductivity, and E. coli. Water quality was monitored from 2011 to 2013. Results: The water quality from the drain pipe at the location of leachate from livestock burial sites showedBOD 37,209 mg/L, COD 8,829 mg/L, NH3-N 3,633 mg/L, and Cl- 580 mg/L. According to the monitoringresults of water quality (Cl-, NH3-N, conductivity) at the survey tube-wells, there was suspicion that 13 out of55 burial sites discharged leachate, five sites discharged highly concentrated leachate (13%): one in Gangneung,one in Wonju, and three in Cheorwon. Conclusion: It was judged that out of thirteen observation wells which showed a possibility of dischargedleachate, three survey tube-wells have established the discharge effect of leachate at burial sites up to recently. Therefore, it is judged that it is necessary to continue monitoring them and devise additional measures.