A V-deflector with stones in the stream is a useful tool for enhancing aquatic biodiversity in degraded streams. A scour hole or pool formed immediately downstream from a V-deflector can serve as fish shelters, especially when the flow is shallow during the dry season. The volume of the scour hole is a measure of benefit to aquatic habitats in the stream. This paper describes an experimental study of the hydraulic characteristics of a scour hole produced by a V-deflector. The general features of the scour hole formed by the V-deflector are then discussed. The volume of a scour hole was found to be proportional to the square of the maximum scour depth. Based on the experiments conducted, the alignment angle of a V-deflector (varied between 50°-130°) has little effect on the scour process. However, the ratio of the opening width to the total channel width, as well as the Froude number of the approach flow, significantly affect the maximum scour depth. Finally, using the experimental data, the relationship for the maximum scour depth of the pool is proposed and validated.
Bibliographical noteFunding Information:
This study has been conducted as a part of a project entitled “Development of Close-to-Nature River Improvement Techniques Adapted to the Korean Streams” supported by the Ministry of Environment, Korea. The authors appreciate the help from Dr. Kyu Ho Kim, leader of the River Research Group and Mr.
All Science Journal Classification (ASJC) codes
- Water Science and Technology
- Management, Monitoring, Policy and Law