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

Figure 4

Instantaneous water surface images in the Water Distribution Pool and the Southern Main Tunnel under operating condition 1.

(a) Panoramic view at 2 s before closing the gate

(b) Panoramic view at 2 s after closing the gate

(c) Panoramic view at 5 s after closing the gate

(d) Panoramic view at 85 s after closing the gate