Author(s): Seungjin Sim; Kwangduk Song; Wonmo Yang; Jaebeom Kwon; Yong-Gyun Park

Linked Author(s):

Keywords: Environmental fluid dynamics code; Flood control reservoir; Monitoring and modeling; Water quality improvement; Yeongsan River

Abstract: The Yeongsan River in South Korea faces significant water quality challenges despite its status as one of the country's major rivers. This study employs the Environmental Fluid Dynamics Code (EFDC) model to investigate the impact of freshwater and flood control reservoir discharge on the river's water quality. Utilizing data from the Yeongsan River Basic Plan Revision, the study conducted simulations and pilot operations at two flood control reservoirs to analyze water quality changes under various operational scenarios. Results indicated water quality improvements in parameters like COD, T-N, and T-P during discharge, while other parameters likes TOC and Chl-a exhibited varied water quality improvement effects depending on conditions. The study underscores the influence of flood control reservoir water quality and external factors on water quality improvements. However, the analysis was limited to a few discharge events, necessitating further research to comprehensively assess water quality improvements considering additional flood control reservoirs, diverse scenarios, and seasonal variations. This study aims to identify the optimal operation strategy for improving water quality and stable water supply in the Yeongsan River and thereby contribute to improving the river's ecosystem.

DOI: https://doi.org/10.3850/iahr-hic2483430201-62

Year: 2024