Table 1. Pressure amplitudes (mm of water column) measured by different models at the stilling basin location.

Model Discharge type Pressure amplitude
Before construction Limited discharge only; Spillway in weak rock 30 mmwc
Stilling basin floor at 226 Full discharge all spillways, 400m3/sec 340 mmwc
Stilling basin floor at 224 Full discharge all spillways 100 mmwc
Stilling basin floor at 223 Full discharge all spillways 60 mmwc
Stilling basin floor at 222 Full discharge all spillways 50 mmwc
Stilling basin floor at 221 50 mmwc