IWA Publishing

Table 1

The range of experimental data

Researcher	Channel shape	Rough element arrangement	Fr₁ (Froude number)	W (cm) Space between elements	Y Sequence depth	Xs (cm) Sill position	Z (cm) Height of elements	No. of data
Bremen (1990)	Sudden expanding	Central sill	2.97–9.02	2–18.1	2.8–10.64	20–80	2.5–7.5	156
Evcimen (2005)	Rectangular	Strip	7.29–16.8	4–9	8.7–18.8	–	0.6–2	113
Simsek (2006)	Rectangular	Strip and staggered	2.13–11.92	3–9	2.5–14.8	–	1	92
Evcimen (2012)	Trapezoidal	Strip	3.92–13.28	2–10	4.15–14.9	–	1–3	107

Researcher	Channel shape	Rough element arrangement	Fr₁ (Froude number)	W (cm) Space between elements	Y Sequence depth	Xs (cm) Sill position	Z (cm) Height of elements	No. of data
Bremen (1990)	Sudden expanding	Central sill	2.97–9.02	2–18.1	2.8–10.64	20–80	2.5–7.5	156
Evcimen (2005)	Rectangular	Strip	7.29–16.8	4–9	8.7–18.8	–	0.6–2	113
Simsek (2006)	Rectangular	Strip and staggered	2.13–11.92	3–9	2.5–14.8	–	1	92
Evcimen (2012)	Trapezoidal	Strip	3.92–13.28	2–10	4.15–14.9	–	1–3	107