• Title/Summary/Keyword: 대책

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Effect of Pollutants Control Measures in So-oak Watershed on the Control of Algae Growth in Daecheong Reservoir (소옥천 유역의 오염제어 대책에 따른 대청호 조류저감 효과 분석)

  • Park, Hyung Seok;Yoon, Sung Wan;Chung, Se Woong;Hwang, Hyun Sik
    • Journal of Environmental Impact Assessment
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    • v.25 no.4
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    • pp.248-260
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    • 2016

  • This study was aimed to assess the effect of diverse pollutants control measures suggested in the Chuso basin and its upstream of So-oak stream watershed where are the most concerned areas on the control of algal bloom occurring in Daecheong Reservoir. The control measures were classified as watershed measures and in-reservoir measures, and their effects were simulated using a two-dimensional hydrodynamic and water quality model. The watershed measures were made up of 1) point sources control, non-point sources control, and their combinations. The in-reservoir measures were supposed to treat sediment at Chuso basin and to install a phosphorus elimination plant (PEP) at the end of So-oak stream. The results showed that the effect of each measure was influenced by the hydrological condition of the year. In wet year, as the contribution of non-point sources increased, the non-point source control measures (NPS1~NPS4) showed more effective compared to other measures, while, the PEP system to eliminate phosphorus from So-oak stream showed better performance in dry year. In particular, the scenario of NPS1, in which all livestock manures were collected and treated but only chemical fertilizers (NPS1) were used for agriculture fields, showed the best performance for the control of algal bloom in Chuso basin among the watershed measures.

  • https://doi.org/10.14249/eia.2016.25.4.248 인용 PDF KSCI

Evaluating the economic benefit of diverse drought mitigation strategies for Korean reservoir systems based on simulated inflow sequences (유입량 모의 기법을 활용한 국내 다목적댐 가뭄 대책의 경제적 효과 평가)

  • Ji, Sukwang;Shin, Geumchae;Lee, Seungyub;Ahn, Kuk-Hyun
    • Journal of Korea Water Resources Association
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    • v.56 no.8
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    • pp.485-496
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    • 2023

  • Recently, South Korea has been making efforts to mitigate the risk of water scarcity during droughts by utilizing various drought response measures in dam operations. While various studies have been conducted on this topic, there is currently a lack of research on the economic effects of drought response measures. In this study, we evaluated the economic effects of drought response measures on nationwide multipurpose dams by using a long-term simulated inflow model based on ARIMA and Copula and a dam operation model that reflects drought response measures. The results showed that the expected benefits per unit flow rate were highest for coordinated operation and alternative water supply measures, at KRW 1,176 and KRW 1,139, respectively, while the benefits of emergency water supply utilization and water supply adjustment were estimated at KRW 956 and KRW 875, respectively. Additionally, when we examined the changes in the economic benefits of drought response measures based on the assumption of increased drought severity in the future, the changes in the drought risk resulting from reduced inflow increased the economic benefits of all drought response measures. The economic benefits of water supply adjustment increased by 2.6% compared to the baseline, while the economic benefits of coordinated operation and alternative water supply measures increased by 11.7% compared to the baseline. This suggests that dam-network-based measures, such as coordinated operation and alternative water supply measures, are crucial as drought risk increases. This study is expected to serve as a fundamental reference for selecting and utilizing drought response measures in the future.

  • https://doi.org/10.3741/JKWRA.2023.56.8.485 인용 PDF