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홍사욱,박대성,문창규 ( Sa Uk Hong,Dai Sung Park,Chang Kyu Moon ) 한국하천호수학회 1969 생태와 환경 Vol.2 No.1·2
1. In spring season, the quality of water and kinds and distribution of aquatic insects over the Kyung-An stream along the length between Yong-In and Han river in Bun-Won was studied. 2. The quality of water near Yong-In on this Kyung-An stream was slightly polluted by the inflow of domestic sewage. Judging from the quality of water and the aquatic insects distribution, this area is gradually transfering from oligo saprove zone to β-mesosaprove zone with such insects as Espeorus sp. and Rhithrogena na. in it. 3. Between Wang-San Ri to near Kwang-Ju along this stream, concentration of Cl^-, Hardness, KMnO₄, consumed, Alkalinity are found to be lower in this area than in other areas and many kinds of aquatic insects especially Trichoptera sp. have been found in great numbers and it belong to the oligo saprove zone, in terms of water quality and aquatic insects. 4. From Won-Dang Ri to near Han river the quality of water shows again a slight pollution and accordingly a slight change in aquatic organism is also obsorved. This area transfering from oligo saprove zone to β-meso saprove zone.