[논문]대청호 조류경보제의 녹조현상 동태와 강우-수문학적 영향

신재기; 강복규; 황순진

doi:10.11614/ksl.2016.49.3.153

대청호 조류경보제의 녹조현상 동태와 강우-수문학적 영향
Water-Blooms (Green-Tide) Dynamics of Algae Alert System and Rainfall-Hydrological Effects in Daecheong Reservoir, Korea 원문보기

생태와 환경 = Korean journal of ecology and environment, v.49 no.3, 2016년, pp.153 - 175

신재기 (한국수자원공사 낙동강통합물관리센터) , 강복규 (환경부 수생태보전과) , 황순진 (건국대학교 보건환경과학과)

초록
AI-Helper

대청호는 담수 초기부터 부영양화와 녹조현상을 겪었고, 조류경보제는 1997년에 도입되었다. 본 연구의 목적은 강우와 수문학적 요인이 녹조현상의 증감 변동과 조류경보제의 장기화에 미치는 영향을 파악하기 위하여 대청호에서 19년 (1997년~2015년) 동안 운영되어 온 조류경보제의 현황을 조사하고 분석하였다. 조류경보제의 총 발령횟수는 46회였고 8월과 9월에 각각 22회 (752일), 16회 (431일)로써 82.6%를 차지하였다. 이 기간에 빈도와 일수가 많았던 것은 강우, 유량 및 수위와 관련성이 컸다. 강우 및 수문사상은 장마와 태풍과 연관되어 6월~9월에 집중되었고, 총강수량은 연강수량의 69.9%를 차지하였다. 유입량의 증가는 강우의 강도, 빈도 및 그 양에 의존적이었다. 연간 총 유입량의 68.4%를 차지하여 저수지에서 수문변화가 가장 급변하는 시기였다. 총방류량도 강우량과 밀접한 관련성이 있었고, 발전방류와 수문방류의 특성이 잘 나타났다. 또한, 상류 댐의 조절 방류로 인해 대청호의 상류수역은 녹조현상에 취약할 수 있었다. 조류경보 발령은 저수지의 수문-여수로 방류의 유무와 관련성이 컸다. 수문방류는 총 25회가 있었고, 연중 7월~9월에 17일로써 최대였다. 개방횟수와 기간은 각각 1회~4회와 3일~37일 범위였다. 수문을 개방하였을 때 경보를 울린 해는 13년이었다. 수문개방에 의한 수체 및 녹조의 이동은 비개방 때보다 약 5배 정도 빨랐고, 저수지 내 조류경보제 장기화에 지대한 영향을 주었다. 녹조현상에서 CHU (소옥천의 추소리 수역)는 여전히 심각한 상태에 있으나, JAN (본류의 장계 수역)이 더욱 중요한 것으로 지적되었다. 조류경보제는 수문-여수로 방류를 중심으로 한 강우와 수문학적 영향을 반드시 고려하여 운영되어야 하겠다. 무엇보다 녹조현상의 대응책에 우리나라의 유역과 저수지 특성에 적합한 육수학적 대책이 포함되어야 하겠으며, 이제부터라도 조류경보제 운영지점에 녹조가 도착하기를 기다리는 것보다 장마 전에 녹조현상의 촉발에 근본적 원인이 되는 저수지 내 우심수역의 체계적 관리와 가이드라인이 필요하겠다.

Abstract ▼ AI-Helper

Daecheong Reservoir has suffered eutrophication and water-blooms by blue-green algae from initial impoundment, and algae alert system (AAS) was introduced in 1997. The purpose of this study was to investigate the effect of rainfall and hydrological factors in increase or decrease variability of green-tide and prolonged AAS, studied and analyzed the current situation of AAS has been operating for 19 years (1997~2015) in Daecheong Reservoir. The total issued number of AAS was 46 times, the most frequent period in August and September were 22 times (752 days) and 16 times (431 days), respectively, it accounted for 82.6%. Many number and frequency during this period were significantly associated with rainfall, various discharge and water level. Rainfall and hydrological events are associated with the rainy season of monsoon-Changma and the typhoon, it was concentrated in June~September, total rainfall in this period accounted for 69.9% of the annual rainfall. An increase in inflows was dependent on the intensity, frequency and the amount of rainfall. Accounted for 68.4% of the total annual inflow, it was a time when the most rapidly changing hydrological variability in the reservoir. The total outflow was closely related to rainfall, and compared the distinctive characteristics of hydropower generation and watergate-spillway discharge. In addition, the upreservoir zone of Daecheong Reservoir could be vulnerable to green-tide by regulating discharge of the upstream dam. The issue of AAS was strongly related to the with and without of watergate-spillway discharge. The watergate-spillway discharge had a total of 25 times, it was maximum 17 days from July to September in the year. And the opening times and each duration of the watergate were 1~4 times and the range of 3~37 days, respectively. When the watergate opened, the issue of AAS was maintained to 13 years and the movement of water bodies and green-tide was great about five times than that of non-open, had a profound effect on prolonged AAS within reservoir. In Daecheong Reservoir, Chusori (CHU) area of the So-ok Stream was still showing serious symptoms green-tide levels in the summer, but Janggye (JAN) waters of the main reservoir was pointed out that more important. AAS will be operated by an absolutely consider the rainfall and hydrological effects around the watergate-spillway discharge. The measures of green-tide will be included in the limnological studies more suited to the characteristics of the watershed and reservoir of the our country. Finally, from now on, we will prepare the systematic management and guidelines for vulnerable zone water-blooms that are the source within the reservoir before the monsoon rather than waiting for the arrival of green-tide on the operating stations of AAS.

주제어

질의응답

핵심어	질문	논문에서 추출한 답변
	저수지로 유입되는 오염물질에 대해 저감 노력이 시급한 이유는?	, 2003a). 저수지로 유입되는 오염물질은 각종 생활오수, 축산폐수 및 산업폐수가 시공간적으로 처리 후 또는 미처리된 상태로 연중 배출되고 있으며, 무엇보다도 조류 성장의 필수 영양염에 의한 수질악화 비중이 날로 증가하고 있어 이에 대한 저감 노력이 시급한 실정에 있다(Lee, 1998; Shin et al., 2003a).
	인(P)의 주요 공급원은?	, 1999; Shin and Cho, 2000). 인(P)의 주요 공급원은 하수처리장의 배출수를 포함한 유역으로부터 공급되는 외적 부하량과 저수지 내 수층의 빈산소(hypoxia)에 의한 저질토로부터 용출되는 내적 부하량이 대부분을 차지한다(Lee et al., 1993; Shin and Cho, 2001; Hur et al.
	우리나라의 하천과 저수지에서의 심각한 수질환경 문제 중 하나로 지목되는 것은?	육수의 부영양화와 녹조현상의 인과관계는 과거부터 오랫동안 전 세계적으로 많은 관심과 연구의 대상이었고(Reynolds and Walsby, 1975; OECD, 1982; Reynolds, 1987; Watanabe et al., 1994; WHO, 2003; Parel, 2014), 우리나라의 하천과 저수지에서도 심각한 수질환경 문제 중의 하나로써 현재까지 고심거리에 해당한다(MOE, 2012; Yoo et al.

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저자의 다른 논문 :

표제어: PCR

동의어: Packet Collision Rate

용어 설명 출처 목록 (6)

용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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