Monitoring of pesticide residues in water and soil at the Bokpocheon watershed in Yangpyong

This study was carried out to indicate the status of agricultural environment in Yangpyong area which is special protection area for tap water in Han river during three years($1996{\sim}1998$). The main study was on pesticide monitoring, analysis of pesticides in Bokpocheon water and soil. Water in this small river for supplying to the rice was found nine pesticides residues, ranged from 0.1 to 22.7 ppb, similar patterns from survey conducted in National Institute of Agricultural Science and technology, Soil in rice paddy has also low levels of eleven pesticide residues, ranged from 0.002 to 0.55 ppm.

남한강지류 복포천유역의 농약잔류량 조사

남한강 지류인 복포천 하천수와 토양을 대상으로 3년간 잔류농약을 분석한 결과 하천수에서 벼농사용 농약인 butachlor, carbofuran, diazinot fenitrothion, fenobucarb, ipobenfos, isorothiolane, molinate, tricyclazole 등 9종이 $0.1{\sim}22.7\;ppb$ 수준으로 검출되었는데, 이는 전국 하천수를 대상으로 한 농업과학기술원의 농약잔류량 조사결과(1998년)와 비슷한 수준으로 나타났고, 농약사용기인 5, 6, 7, 8월에만 농약이 검출되었으며, 검출수준은 우리나라 먹는 물의 수질기준보다는 낮은 수준이었고, 이지역의 관정수에서는 농약이 전혀 검출되지 않았다. 논 토양에서는 butachlor, diazinon, dimeperate, dimethometryn, fenitrothion, iprobenfos, isoprothiolane, molinate, parathion, piperophos, thiobencarb 등 11종의 농약이 $0.002{\sim}0.55\;ppm$의 낮은 수준으로 검출되었다.