WASP5를 이용한 동복호 수질분석 = THMs Dongbok Lake Water Quality Analysis with WASP5

국문 초록 (Abstract)

人工湖水 수질의 효과적인 관리를 위해서는 호수의 수질현황 및 생태계, 유기퇴적물, 流域의 수질오염원 등에 대한 지속적인 조사가 필요하다. 또한 이러한 자료를 토대로 장래의 수질을 예측하며, 대상 호수에 가장 적절한 수질관리대책을 수립하여야 한다. 본 연구의 대상호수인 同福湖는 몇 차례의 확장을 거쳐 1985년에 완공되어 광주의 중요한 上水原으로 이용되고 있다. 본 硏究에서는 同福湖의 효율적인 수질관리를 위한 자료를 제공하기 위하여 同福湖의 수질현황을 분석하고, 호수 수질모델의 하나인 WASP5를 이용하여 중요 水質因子 分析値들의 變化와 差異를 조사하였다.

다국어 초록 (Multilingual Abstract)

The objective of this study is the analysis of Dongbok lake water quality with water quality model. The WASP5 model was used in two-dimensional water quality analysis.
The significant results of this study were summarized below :
Storage water volume changed up to 330% on the base of minimun storage water volume in 1997. According to temperature analysis, overturn between surface water and low layer water occured from February to April, and from October to December. Stratification was established in summer season. In summer season, DO in the low layer was entirely exhausted because of the oxidation of organics and stratification. Dongbok lake showed 2nd grade in surface water quality standard with BOD, but water quality of surface and subsurface layer water became worse from February to April when it was dry and overturning season. Ammonia and nitrate nitrogen concentration was low. In the case of ammonia nitrogen, low layer concentration was higher than that of surface layer, but the case was reverse in the case of nitrate. Phosphate concentration in the low layer was higher than that of the surface layer from June to September because the phosphate was elluted from sediment. Dongbok lake was in the mesotrohpic or eutrophic state according to chlorophyll-a concentration. Chlorophyll-a concentration in the surface layer was higher than that of the low layer in active photosynthesis period but it was similar in the weak photosynthesis period. The overal water quality of Dongbok lake was good. But proper water quality management was required especially in the overturning and summer season.