Study on Hydraulic Characteristic of Unsteady Flow at Huangchigou Water Distribution Hub by Observing Instantaneous Water Level Based on Single-Camera and Fixed-Scale Compensation Method
Table 1
Statistical table of hydraulic characteristic parameters in the Huangchigou Water Distribution Hub.
Operating condition
Gate opening or closing speed (m/s)
Wave velocity (m/s)
Quasi-steady-flow duration (s)
Unsteady-flow duration (s)
1
Closing, 0.329
2.217
After 10.0 s, most of the hydraulic oscillation phenomena in the Southern Main Tunnel disappeared
After 20.0 s, the side tank in the Water Distribution Pool starts to withdraw water. After 85.0 s, the water in the Southern Main Tunnel disappeared
2
Opening, 1.538
2.494
After 11.8 s, most of the hydraulic oscillation phenomena in the Southern Main Tunnel disappeared
After 300.0 s, the Water Distribution Pool and the Southern Main Tunnel reached a steady-flow state
