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NTIS 바로가기한국농공학회논문집 = Journal of the Korean Society of Agricultural Engineers, v.59 no.2, 2017년, pp.91 - 99
이정범 (Department of Road Construction, Uiwang City Hall) , 이재용 (Department of Agricultural and Rural Engineering, Chungbuk National University) , 김진수 (Department of Agricultural and Rural Engineering, Chungbuk National University)
The objective of this research was to investigate runoff characteristics of suspended solid (SS) and chemical oxygen demand (COD) from a paddy field watershed during storm events in the growing and non-growing seasons. Average of event mean concentration (EMC) of pollutants were 56.9 mg/L for SS and...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
초기세척현상은 무엇인가? | 초기세척현상 (first flush)은 유출수의 최대농도가 첨두유량 앞에서 나타나는 현상을 말하는 데, 여러 개의 강우사상 (1, 3, 4, 5)에서 초기세척현상을 보였으나, 큰 선행강우가 있었던 강우사상 6에서는 초기세척 현상을 보이지 않았다. 선행강우가 적은 경우에 SS의 초기세척현상이 발생하는 것은 바닥에 쌓여있던 토사가 초기 유출수에 의하여 일시에 유출되기 때문으로 생각된다. | |
한국에서 농사를 짓지 않는 시기보다 농사짓는 시기가 평균유출률이 높은 이유는 무엇인가? | 평균유출률은 영농기가 비영농기 보다 높게 나타났는데. 이는 영농기에는 계속된 강우로 표층토가 포화상태에 가깝기 때문으로 사료된다. 일본에서는 경운 전 비영농기 필지 논에서 27~57 %의 유출률을 보였고(Kunimatsu et al. | |
한국의 2015년 현재의 논 면적은 어떠한가? | 비점원 오염물질은 점원 오염물질과는 달리 강우에 의한 유출과 밀접한 관련이 있는 것으로 알려져 있다 (Wolfe, 2001). 최근 논면적은 감소하고 있으나, 2015년 현재의 논 면적은 약 90만 ha (Ministry of Agriculture, Food and Rural Affairs, 2016)로 우리나라 농경지 면적의 54 %를 차지하여 논으로부터의 배출되는 비점원 오염부하는 상당히 클 것으로 생각된다. 논은 평평한 지형, 담수조건, 식생 등으로 습지와 유사하나, 작물 생산을 위한 시비 (施肥)가 이루어지고, 관개배수가 이루어지고 있는 점이 다르다. |
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