Hydrodynamic and Flow Distribution Responses to Integrated River Regulation Measures in the Yangtze River's Chizhou Reach China Waterborne Transport Research Institute

Format:

Book

Conference/Event

Author/Creator:

Gao, Jin, author.

Contributor:

Feng, Lilei

Lü, Lixin

Ruan, Junsheng

Yan, Jun

Conference Name:

2025 5th International Conference on Smart City Engineering and Public Transportation (SCEPT2025) (2025-03-28 : Beijing, China)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

River regulation engineering is pivotal for harmonizing flood resilience, ecological integrity, and navigation efficiency in large alluvial systems, particularly under intensified hydrological stressors. The Yangtze River, Asia's largest fluvial network, has experienced altered hydro-sedimentary regimes and exacerbated channel instability due to cascade reservoir operations, demanding adaptive strategies to stabilize dynamic reaches. This study investigates hydrodynamic and flow distribution responses to integrated regulation measures in the Chizhou Reacha vulnerable alluvial segment characterized by severe bank erosion, sedimentation-induced flow imbalances, and constrained floodplains. Using a 1:500/1:100 scaled hydraulic model validated under flood and low-flow conditions, we assess synergistic effects of dredging, submerged dams, and flow-regulating groynes. Here we show that dredging the Wanchuanzhou right branch increases its flow diversion ratio by 1.71% (annual average flow) to 4.57% (bankfull flow), redistributing velocities (0.10.35 m/s reduction in dredged zones) and mitigating sedimentation. Submerged dams modulate cross-sectional flow areas: a 5 m crest dam in the Xinglongzhou right branch reduces discharge by 23.5%, while a 2 m dam in the Changshazhou left branch elevates the middle branch's diversion ratio by 2.01%. Flow-regulating groynes enhance right-branch inflows by 0.540.75% through hydrodynamic redirection, balancing systemic flow partitioning. Contrasting prior studies focused on isolated interventions, our results reveal that multi-project integration addresses both localized instability and basin-scale hydraulic reconfiguration. These findings underscore the necessity of holistic engineering frameworks to mitigate cascading impacts in regulated rivers. By linking localized measures to basin-scale hydraulic stability, this study advances strategies for sustainable river management in sediment-laden, anthropogenically altered systems

Notes:

Vendor supplied data

Publisher Number:

2025-99-0040

Access Restriction:

Restricted for use by site license