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이공범 ( Lee Gong Beom ),김용구 ( Kim Yong Gu ),박성천 ( Park Seong Cheon ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.1
This study is to decide water concentration of instream flow to upgrade water quality of Gwangju cheon improving one of instream flow in the upper Gwangju cheon. Present water quality of Gwangju cheon (Based on BOO) maintains 3rd-4th level but this study intends to decide water concentration of instream flow assuming that target water quality is 1st and 2nd level to improve water quality. For QUAL2E applies to estimation form of water quality that is using widely in rivers. And, HEC-RAS form is used to estimate mathematical input value that is using in QUAL2E. In the result of estimation of water quality, it is difficult to upgrade to 1st level because Gwangju cheon is lack of self-purification ability. However, it is possible to improve water quality to 2nd level. According to analyzing of the result of QUAL2E form by 0.5,0.8,1.0 of instream flow, it is decided 0.5㎝s to 2.15㎎/ℓ, 0.8㎝s to 2.70㎎/ℓ, 1.0cms to 2.88㎎/ℓl based on BOO.