4.2 Wave Parameters Based on Small Amplitude Wave Theory
135
a
E
1.5
'-'
..c
01)
•
'v
•
..c
""
~ 1.0
0.5
numerical model
• expo data (Battjes. Stive. 1985)
0.0
0
50
100
150
200
250
300
b E 0
'-'
..c -I
.... c.. -2
co
"0
.... -3
£ o:s
~ -4
-5
-6
-7
0
50
100
150
200
250
300
Distance (m)
Fig. 4.21: Wave height decay over plane beach. Comparison of periodic bore model
with experimental data: a wave height distribution, b water depth (from Massel, B. ,
1998, with permission)
Most tidal bores are relatively small, of the order of 0.5 m, but some can be
exceptionally high. The Severn River undular bore in England is some 1-2 m
high, whereas the Amazon bore reaches about 5 m.
The conditions of conservation of mass and momentum across the bore provide a rate of energy loss in the bore (Massel, 1989):
( 4.63)
in which hd and hu are water levels in the downstream and upstream regions
135
a
E
1.5
'-'
..c
01)
•
'v
•
..c
""
~ 1.0
0.5
numerical model
• expo data (Battjes. Stive. 1985)
0.0
0
50
100
150
200
250
300
b E 0
'-'
..c -I
.... c.. -2
co
"0
.... -3
£ o:s
~ -4
-5
-6
-7
0
50
100
150
200
250
300
Distance (m)
Fig. 4.21: Wave height decay over plane beach. Comparison of periodic bore model
with experimental data: a wave height distribution, b water depth (from Massel, B. ,
1998, with permission)
Most tidal bores are relatively small, of the order of 0.5 m, but some can be
exceptionally high. The Severn River undular bore in England is some 1-2 m
high, whereas the Amazon bore reaches about 5 m.
The conditions of conservation of mass and momentum across the bore provide a rate of energy loss in the bore (Massel, 1989):
( 4.63)
in which hd and hu are water levels in the downstream and upstream regions