수생태 환경유지를 위한 하천생태유량 산정
Assessment of Ecological Streamflow for Maintaining Good Ecological Water Environment
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참고문헌
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초록
The objective of this study is to analyze the relationship between stream water quality of TN (total nitrogen), TP (total phosphorus), and BOD(Biochemical Oxygen Demand) and TDI (Trophic Diatom Index) score determined by physico-chemical factors, biomass, and standing crops of epilithicdiatoms, and to estimate the required amount of ecological streamflow for good water environment of Trophic Diatom. For the main stream of Chungjudam watershed of South Korea, total 100 field data of 3 years (2008 ∼ 2010) measured in May and September were used to derive the relationshipbetween water quality and TDI. Trophic Diatom had high correlation (0.55 determination coefficient) with TN. Using the relationship, the requiredstreamflow was evaluated by using the Soil Water Assessment Tool (SWAT) for good Trophic Diatom water environment through T-N water qualitymaintenance. The SWAT simulated 8 years (2003 ∼ 2010) stream discharges and T-N water quality along the main stream. From present garde C (scorerange: 30.0 ∼ 45.0) to grade A (score above 60.0) of TDI, the May needs additional streamflow of 63.1 m3/sec (+36.7 % comparing with the presentstreamflow of 172.0 m3/sec) at the watershed outlet.
Abstract
The objective of this study is to analyze the relationship between stream water quality of TN (total nitrogen), TP (total phosphorus), and BOD(Biochemical Oxygen Demand) and TDI (Trophic Diatom Index) score determined by physico-chemical factors, biomass, and standing crops of epilithicdiatoms, and to estimate the required amount of ecological streamflow for good water environment of Trophic Diatom. For the main stream of Chungjudam watershed of South Korea, total 100 field data of 3 years (2008 ∼ 2010) measured in May and September were used to derive the relationshipbetween water quality and TDI. Trophic Diatom had high correlation (0.55 determination coefficient) with TN. Using the relationship, the requiredstreamflow was evaluated by using the Soil Water Assessment Tool (SWAT) for good Trophic Diatom water environment through T-N water qualitymaintenance. The SWAT simulated 8 years (2003 ∼ 2010) stream discharges and T-N water quality along the main stream. From present garde C (scorerange: 30.0 ∼ 45.0) to grade A (score above 60.0) of TDI, the May needs additional streamflow of 63.1 m3/sec (+36.7 % comparing with the presentstreamflow of 172.0 m3/sec) at the watershed outlet.
참고문헌 (38)
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