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NTIS 바로가기海洋環境安全學會誌 = Journal of the Korean society of marine environment & safety, v.21 no.6 = no.71, 2015년, pp.617 - 636
김영태 (국립수산과학원 갯벌연구소) , 최윤석 (국립수산과학원 갯벌연구소) , 조윤식 (국립수산과학원 갯벌연구소) , 최용현 (국립수산과학원 갯벌연구소) , 전승렬 (국립수산과학원 갯벌연구소)
The Mokpo coastal waters receive discharges from three artificial lakes(Youngsan, Youngam, Geumho) and other terrigenous freshwater inflows(streams, sewage treatment effluent, fresh groundwater), which exhibit very high concentrations of nutrients and/or organic matters. To understand spatial distri...
핵심어 | 질문 | 논문에서 추출한 답변 |
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우리나라 주요 강 하구에 방조제 설치로 인한 결과는 무엇인가? | 우리나라 주요 강 하구에는 방조제(하구둑)가 설치되어 있어, 인위적인 수문 조절을 통해 해수와 담수가 혼합 또는 유동되는 매우 제한된 순환 구조를 이루고 있다. 서해 남부 및 남해 서부 가장자리에 위치해 있는 영산강 하구역 및 목포항 주변해역은 크고 작은 섬들과 협수로 등으로 인해 폐쇄성이 강한 지리적 특성을 나타내고 있으며, 해안과 인접한 곳에 인공 호수 3곳이 조성되어 있다. | |
하구역에서의 담수 방류가 야기하는 변화에는 무엇이 있는가? | 이와 같이 방조제 운영에 따른 수문 개방이 빈번하게 이루어지고 있는 하구역에서, 담수 방류는 주변수역 내 염분 변동(Kim et al., 2013)뿐만 아니라, 조석의 비대칭성 증가(Ryu et al., 2000; Kang and Moon, 2001; Jung, 2011; Jung and Jeong, 2013)와 유체의 유동 패턴 변화(Byun et al., 2004; Jang and Kim, 2006), 연안 침·퇴적 변화(Bang et al., 2013), 동·식물 플랑크톤 및 저서생물 군집에 대한 생리적 스트레스 가중(Lim and Park, 1998; Yoon, 2001; Yoon et al., 2013), 영양염의 과다 공급 및 부영양화 심화(Jeong et al., 1999) 등 하구역 환경과 수생태계 전반에 직·간접적인 영향을 야기하고 있다. 이러한 인식 하에 영산강 하구역 및 주변의 해양 환경과 생태계에 대해 영향 조사와 변화 여부에 대한 연구가 꾸준히 진행되고 있다. | |
COD가 조사 시기 중 가장 높은 농도값을 타나낸 것은 언제인가? | COD는 수중의 유기물량과 유기오염 정도를 간접적으로 나타내는 지표 항목이다. 조사 시기 중 7월에 가장 높은 농도값을 나타냄으로써, 영산호 방조제와 영암호-금호호 방조제에서 담수 방류가 이루어진 시기와 현장 조사일 간 간격이 짧을수록 연안역 내 유기물질의 농도가 높은 것으로 나타났다. 반면, 11월에는 가장 낮은 농도 분포를 보였다(Table 3). |
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