보 건설 이후 영산강 보 구간에서의 질소계열 영양염류 및 식물플랑크톤 동태 Characteristics of Nitro-nutrients and Phytoplankton Dynamics in the Yeongsan River after Weir Construction원문보기
Insomuch as it is important to manage water quality, from the perspective of water management, it is essential to understand the effect of the weirs on water quality and phytoplankton dynamics in various regions. The purpose of this study is to investigate the characteristics of nitro-nutrients, as ...
Insomuch as it is important to manage water quality, from the perspective of water management, it is essential to understand the effect of the weirs on water quality and phytoplankton dynamics in various regions. The purpose of this study is to investigate the characteristics of nitro-nutrients, as well as occurrences and succession patterns of phytoplankton, in the river sections of the two weirs in the Yeongsan River for the five years (from 2012 to 2016) after the weir construction. In respect to this data, the average water temperature measured at the representative point in the section of the Seungchon Weir ($17.1^{\circ}C$) was higher than that of the Juksan Weir ($16.6^{\circ}C$) by comparison. By way of an analysis of this data, it was found that the water quality variables such as, organic matter, nitrogen nutrients and phosphorus nutrients were improved gradually during the period, but the degree of the improvement differs as noted and measured between the weirs. Under the circumstances, it is especially noted that the $NH_3-N$ concentration was higher for the point of the Seungchon Weir (2.204 mg/L) than that of the Juksan Weir (1.157 mg/L). This indicates that effluent as seen from sewage treatment plants and hydrological feature near the densely population area, could be the main cause for the incidence of water pollution in the upstream section of the Seungchon Weir. Additionally, the phytoplankton analysis showed that a relative abundance of diatoms and green algae were 56.9 % and 25.8 % respectively. However, it is noted that the cyanobacteria was measured lower as 10.7 %. Also, in the study sites cell density and occurrence frequency of cyanobacteria were relatively lower than compared to the same measurements noted in other rivers.
Insomuch as it is important to manage water quality, from the perspective of water management, it is essential to understand the effect of the weirs on water quality and phytoplankton dynamics in various regions. The purpose of this study is to investigate the characteristics of nitro-nutrients, as well as occurrences and succession patterns of phytoplankton, in the river sections of the two weirs in the Yeongsan River for the five years (from 2012 to 2016) after the weir construction. In respect to this data, the average water temperature measured at the representative point in the section of the Seungchon Weir ($17.1^{\circ}C$) was higher than that of the Juksan Weir ($16.6^{\circ}C$) by comparison. By way of an analysis of this data, it was found that the water quality variables such as, organic matter, nitrogen nutrients and phosphorus nutrients were improved gradually during the period, but the degree of the improvement differs as noted and measured between the weirs. Under the circumstances, it is especially noted that the $NH_3-N$ concentration was higher for the point of the Seungchon Weir (2.204 mg/L) than that of the Juksan Weir (1.157 mg/L). This indicates that effluent as seen from sewage treatment plants and hydrological feature near the densely population area, could be the main cause for the incidence of water pollution in the upstream section of the Seungchon Weir. Additionally, the phytoplankton analysis showed that a relative abundance of diatoms and green algae were 56.9 % and 25.8 % respectively. However, it is noted that the cyanobacteria was measured lower as 10.7 %. Also, in the study sites cell density and occurrence frequency of cyanobacteria were relatively lower than compared to the same measurements noted in other rivers.
, 2016).이에 본 연구는 보 건설 이후 영산강 본류 보 구간에서 수질 및 식물플랑크톤 발생 양상을 5년간 모니터링하여 그 특성을 파악하고자 하였다. 본 연구 결과는 영산강 보 구간의 수질 관리를 위한 기초자료로 활용될 수 있을 것이다.
제안 방법
현장항목은 현장수질측정기(Hydrolab, SURVEYOR 4)를 이용하여 수온, pH, DO, 전기전도도를 측정하였으며, 수질분석을 위하여 채수한 시료는 4 °C의 냉암조건에서 실험실로 운반하였다. 운반된 시료는 수질오염공정시험기준(ME, 2011)에 준하여 BOD, COD, TOC, T-N, DTN, NO3-N, NH3-N, T-P, DTP, PO4-P, SS, Chl-a, 총대장균군, 분원성대장균군 등 14개 항목을 분석하였다. 식물플랑크톤 분석을 위한 시료는 최종 농도가 5%가 되도록 Lugol‘s solution으로 현장에서 고정하여 운반 하였으며, 24시간 이상 정치하여 침전시킨 다음 광학현미경(Nicon Eclipse Ni)으로 검경을 실시하였다.
유역면적은 1,977 km2 , 2,359 km2 과 저수용량 9백만m3 , 27백만m3 의 다기능 보이다. 조사는 2012년 5월부터 2016년 12월까지 매주 1회 승촌보와 죽산보 상류 500 m 구간에서 실시하였으며, 현장 측정 및 수질분석을 수행하였다(Fig. 1). 현장항목은 현장수질측정기(Hydrolab, SURVEYOR 4)를 이용하여 수온, pH, DO, 전기전도도를 측정하였으며, 수질분석을 위하여 채수한 시료는 4 °C의 냉암조건에서 실험실로 운반하였다.
대상 데이터
정량분석은 Sedwick-Rafter chamber를 사용하여 출현 종별로 계수한 후 mL당 세포수로 산정하여 실시하였다(ME, 2011). 연구대상 지역의 기상 관측자료는 기상청(KMA, 2018)에서 제공 받았다. 수질 및 환경인자, 식물플랑크톤과의 상관성을 파악하기 위하여 2012년도부터 2016년도까지의 5년간의 수질 데이터를 이용하여 SPSS(ver.
1). 현장항목은 현장수질측정기(Hydrolab, SURVEYOR 4)를 이용하여 수온, pH, DO, 전기전도도를 측정하였으며, 수질분석을 위하여 채수한 시료는 4 °C의 냉암조건에서 실험실로 운반하였다. 운반된 시료는 수질오염공정시험기준(ME, 2011)에 준하여 BOD, COD, TOC, T-N, DTN, NO3-N, NH3-N, T-P, DTP, PO4-P, SS, Chl-a, 총대장균군, 분원성대장균군 등 14개 항목을 분석하였다.
데이터처리
연구대상 지역의 기상 관측자료는 기상청(KMA, 2018)에서 제공 받았다. 수질 및 환경인자, 식물플랑크톤과의 상관성을 파악하기 위하여 2012년도부터 2016년도까지의 5년간의 수질 데이터를 이용하여 SPSS(ver. 17.0) 통계처리 프로그램으로 상관분석을 실시하였다. ;연구대상 지역의 기상 관측자료는 기상청(KMA, 2018)에서 제공받았다. 수질 및 환경인자, 식물플랑크톤과의 상관성을 파악하기 위하여 2012년도부터 2016년도까지의 5년간의 수질 데이터를 이용하여 SPSS(ver.
성능/효과
1) 영산강 보 구간의 조사기간 동안 평균 수온은 각각 17.1 °C와 16.6 °C로 상류의 승촌보가 죽산보에 비해 높았으며, 연도별로는 두 개 보 모두에서 점차 증가하였다.
2) 수질요인 중 유기물 및 영양염 항목은 수체가 안정될수록 연도별로 점차 개선되고 있었으나, 보 구간별로 개선효과는 상이하였다. 특히 NH3-N는 승촌보에서 평균 2.
3) 전체 조사기간 동안 규조류와 녹조류의 생물량 구성비는 82.7 %로 높은 비율을 차지하였으나, 상대적으로 남조류의 생물량 비율은 10.7 %로 낮게 나타났다. 한편, 분류군별 세포밀도는 유사한 위도에 위치한 낙동강 수계 보 구간의 결과와 차이를 보였다.
후속연구
이에 본 연구는 보 건설 이후 영산강 본류 보 구간에서 수질 및 식물플랑크톤 발생 양상을 5년간 모니터링하여 그 특성을 파악하고자 하였다. 본 연구 결과는 영산강 보 구간의 수질 관리를 위한 기초자료로 활용될 수 있을 것이다.
질의응답
핵심어
질문
논문에서 추출한 답변
4대강 사업의 일환으로 건설된 2개의 보는 무엇인가?
4대강 사업의 일환으로 영산강 본류에는 2개의 보가 건설되었으며, 새롭게 축조된 승촌보와 죽산보는 영산강 수계의 물리적 환경변화를 야기하게 되었다. 보의 건설로 보구간의 수량은 많아졌으나, 수심이 깊어지고 흐름이 지체되어 체류시간이 증가되었다(Jung and Kim, 2017).
수생태계의 진단 및 향후 관리방안을 위해 식물플랑크톤을 이용하는 이유는?
식물플랑크톤은 수생태계의 1차 생산자로서 수질 및 수리 수문학적 특성에 따라 현존량과 종조성의 변화가 뚜렷하기 때문에, 수환경의 변화를 파악하는데 중요한 생물학적 인자로 이용되고 있다. 따라서 보 건설 이후 수질 및 조류발생의 특성을 파악하는 것은 보 구간 수생태계의 진단 및 향후 관리방안을 마련하는 측면에서 중요하다고 할 수 있다(Tekile et al.
영산강의 특징은 무엇인가?
영산강은 타 수계에 비하여 수질오염도가 높은 것으로 알려져 있으며, 특히 광주광역시와 같은 인구밀집지역이 영산강 상류 구간에 위치하고 있어, 부영양화 및 저층 산소 고갈 등의 수질문제가 빈번하게 발생되어 왔다(Shin et al., 2016).
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