Table 3 Estimates of the return period (years) of seven flood events based on the flood frequency curve (FFC) (column 4) and using the new FEH (column 5) and New Guide (column 6) methods
1
2
3
4
5
6
7
8
Site
Rainfall (mm)
Duration (hr)
SMD
FF
Defra
FEH
New Guide
5/4
Lud (29/5/1920)
150
3-3.5
26
19000
675000
33000
35.5
1.7
Brue (28/6/1917)
190
12
47
1352
12000
1570
8.9
1.2
Brue (12/7/1982)
94
10
41
71
360
67
2.5
0.9
Withycombe Brook, (6/10/1960)
31
1.5
0
99
117
98
1.2
1.0
Camel (8/6/1957)
103
7.5
30
91
242
92
2.7
1.0
Valency (16/8/2004)
160
4.5
12
10460
144000
9700
13.8
0.9
Rother (25/6/2007)
64
23
4
65
80
56
1.2
0.9
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