PIANC Smart Rivers 2022

Reviewing Presentation documents

Topic:

Title:

Author(s):

Author 1

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 2

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 3

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Author 4

Name：

Affiliations：

Region：

Email：

Is corresponding author or not (one only)：

Abstract : *(250~1000 words)

The submerged dam is one of the commonly used schemes for the prevention and treatment of the pit-type collapse, which is often used in the pit-type collapse emergency treatment in Anhui and Jiangsu sections of the Yangtze River and has achieved good effect of promoting siltation. The Height of submerged dam is lack of theoretical basis in design, so it is determined by experience in the past. For example, the maximum relative height of the submerged dam (the ratio of the maximum water depth to the maximum dam height in the section of the submerged dam) is 0.5, and the maximum relative height at the Zhinan village is 0.15. Based on the physical model of the pit-type collapse at the Zhinan village in Yangzhong reach, the velocity, flow direction and surface flow pattern at 12 points in the outlet submerged dam with 5 different heights were measured. The experimental results show that the velocity of 0.2H layer increases, the velocity of 0.8H layer decreases at the down-stream area of pit-type pool, and the velocity decreases mainly at the up-stream of pit-type pool under the influence of the submerged dam. The mean velocity in pit-type pool decreases with the increase of the height of the submerged dam, and the relationship between them is linear. Because of the square relation between the engineering quantity and the height of the submerged dam, it is considered that the submerged dam should not be too high as long as it can satisfy the sedimentation in pit-type pool.

Key words: (max: 5)

Reference no.

Slides：

click to download