Drop characteristics of free-falling nappe for aerated straight-drop spillway

Figures & data

Figure 1 Experimental layout: (a) lateral view and (b) top view

Figure 2 Illustration of free-falling nappe in aerated straight-drop spillway

Table 1 Experimental flow conditions

Sample	Parameter	Experimental conditions
Calibrated sample	S o	0%, 3%, 6%, 9%
	H	0.3, 0.25, 0.2, 0.15 m
	q	0.0076–0.0402 m^2/s
	F o	0.83–1.84
	R o	7642–34,594
	F w	3.53–20.40
	D	0.00026–0.04874
Simulated sample	S o	0%, 3%, 6%, 9%
	H	0.3, 0.25, 0.2, 0.15 m
	q	0.0138–0.0359 m^2/s
	F o	0.94–1.44
	R o	12,995–31,204
	F w	4.21–19.87
	D	0.00072–0.03845

Figure 3 Comparison between measured/predicted drop characteristics: (a) dimensionless drop length and (b) vertical unit drop force

Figure 4 Comparison of drop length L/H versus relative drop height y _c /H