Abstract

대관령 고랭지 농업지대 인근 주요 하천과 도암호의 수질의 이화학성 및 식물성플라크톤의 발생 양상을 조사하여 남한강 상류 수계의 전반적인 수질특성을 파악하고자 하였다. 도암호의 화학적 산소 요구량 (COD)은 <TEX>$6.1mg\;L^{-1}$</TEX> 이고, 총 인 (Total phosphorous)의 함량은 0.26 으로 호소수 생활환경 기준 VI등급 보다 높았다. 부유물질은 평균 9.77 NTU로 호수수 생활기준 보다 높았다. 식물플랑크톤의 농도는 7월부터 9월까지 <TEX>$2.0{\times}10^3cells\;mL^{-1}$</TEX> 이상으로 확인되었는데 이는 여름철 고온과 강우에 의해 영양물질의 대량 유입으로 인해 남조류가 발생하였기 때문인 것으로 생각된다. 온타리오 퇴적물 기준과 비교해 보면, 도암호의 총 질소 및 총 인의 농도는 LEL과 SEL의 중간 정도 값을 보여 오염이 상당부분 진행되어 체계적인 관리로 오염원을 저감 및 차단할 수 있는 방안이 마련되어져야 할 것으로 생각된다. This study was surveyed that water physiochemical characteristics and phytoplankton incidence of main stream and Lake Doam near to Daegwallyeong agricultural area. Based on above results, it was conducted to get information overall water characteristics in south Han upstream river. COD value of Lake Doam was <TEX>$6.1mg\;L^{-1}$</TEX> and T-P (Total phosphorous) from there was <TEX>$0.26mg\;L^{-1}$</TEX> which was higher than the value of grade VI based on lake water living environment standard. Suspended solid was an average of 9.77 NTU which was higher than value of lake living standard. Concentration of phytoplankton was over <TEX>$2.0{\times}10^3Cell\;mL^{-1}$</TEX> from July to September. It was considered that cyanobacteria were occurred due to massive influx of nutrient material by high temperature and rainfall during this season. Compare to Ontario's sediment quality guidelines, T-N and T-P was middle value between LEL and SEL in Lake Doam. This value means that contamination in water is serious. Therefore, it is considered that systematic management was needed to reduce and block contamination source.

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