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홍사욱,조현영,나규환 ( Hong Sa Uk,Hyeun Yeong Cho,Kyu Hwan Ra ) 한국하천호수학회 1976 생태와 환경 Vol.9 No.1·2
The water quality has been studied in the artifical Asan reservoir that constructed in Asan bay. from kyung gi-do to the Chung nam during Autumn in 1975. In generally the content of NH₃-N, NO₂-N and NO₃,-N in this water were higher than that of the natural river water but lower than that of the lower course of Han river as which polluted by the sewage water owing to the Seoul city. The content of Cl^- and hardness in this water were more higher than in natural river water but compared with the brackish water it was very low The salinity in this reservoir was rapidly decrease. As a result it is changing to inland water from brackish water. As compared with Ca^(++) and Mg^(++) in the ordernerlly inland water, in generally the content of Ca^(++) is higher than that of Mg^(++). On the centrary the ratio of Ca^(++) to Mg^(++) in brackish water was oppesite to inland water. In this water it show oppoisite ratio, so it is net yet fully changing to inland water from brackish water.