Author(s): HU Han; Nie Yanhua; Hou Dongmei; Liu Shengfan

Linked Author(s):

Keywords: High dam; Flood discharge noise; Prototype observation; Model test

Abstract: The noise produced by high dam flood discharge has a prolonged duration and extensive propagation range, potentially impacting the lives of nearby residents, an issue that has gained attention in recent years. This study examines the Xiangjiaba Hydropower Station through prototype observations and hydraulic model tests to assess the environmental noise effects of high dam flood discharges. In this study, high dam flood discharge noise is categorized into point, line, and surface sources, and develops a flood discharge sound field model. Results indicate a strong correlation between spillway operation and generated noise. Analysis shows that the primary noise source is the rolling surface water in the stilling basin from flows entering through the surface and bottom spillways, while secondary noise is attributed to local eddies from the jets. Under identical discharge conditions, the total noise power from surface spillways is significantly higher than that from bottom spillways.

DOI: https://doi.org/10.64697/IAHR-APD2024_P464

Year: 2024