Related Experiment Video
Updated: May 29, 2026

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
Published on: May 2, 2025
Modelling a turbidity current in Soyang reservoir (Korea) and its control using a selective withdrawal facility
1Department of Environmental Engineering, Chungbuk National University, 12 Gaeshing-dong, Heungduk-gu, Cheongju, Chungbuk 361763, Korea. ilovmi@chungbuk.ac.kr
Abstract:
Persistent turbidity in reservoirs and their downstream after flood events is one of most important environmental issues in Korea. Recently, modification of withdrawal facility and installation of a new selective withdrawal structure (SWS) have been implemented for the mitigation of downstream impact and sediment loading into water treatment facilities. This study was to explore the characteristics of flood density flow induced into Soyang Reservoir and the transport processes of suspended sediments (SS) through application of coupled two-dimensional hydrodynamic and particle dynamic models (TM-1, TM-2 and TM-3). The TM-3 including a turbidity attenuation rate as a lumped parameter showed best performance in reproducing the magnitude and distribution of SS in the reservoir. The validated model was applied to evaluate the effectiveness of SWS, which was designed for the reservoir, with 6 different historical flood events. The magnitude of vertical mixing of the turbidity plume and its persistence within the reservoir were closely correlated to the ratio of the volume of turbidity flow to the total reservoir storage (the theta value). The operation of SWS showed a positive effect as long as theta is between 0.3 and 0.6 but negative when theta = 0.83 for the study reservoir, thus it should be optimized based on the theta value for a better management of the reservoir.
Related Concept Videos
Net Change Theorem
Design Example: Creating a Hydraulic Model of a Dam Spillway
Conservation of Mass in Moving, Nondeforming Control Volume
In the context of a detention basin, the conservation of mass states that the total mass of water entering the basin must equal the mass leaving the basin plus any accumulation of...
Typical Model Studies
Bioreactor Design and Operational System
Modeling and Similitude

