Narellan Creek Overland Flood Study (Vol 1) - Flipbook - Page 46
Narellan Creek Catchment
Flood Study
Table 9
Comparison between simulated and surveyed flood levels the June 2016 flood
ID
Reported Flood Level
(mAHD)
Simulated Flood Level
(mAHD)
Difference
(m)
64
65.32
65.30
-0.02
21
71.81
71.87
0.06
20
71.95
71.87
-0.08
27
72.62
72.55
-0.07
24
73.30
73.53
0.23
26
73.49
73.58
0.09
23
73.55
73.55
0.00
25
73.56
73.54
-0.02
22
73.76
73.63
-0.13
63
76.45
76.43
-0.02
40
85.16
85.08
-0.08
39
85.22
85.08
-0.14
48
85.27
85.34
0.07
41
86.66
86.65
-0.01
62
88.27
87.84
-0.43
43
95.09
95.24
0.15
42
95.13
95.28
0.15
44
98.60
98.73
0.13
47
99.07
99.16
0.09
46
102.67
102.75
0.08
45
102.80
102.75
-0.05
Comment
Surveyed flood mark is ~0.2m lower
than nearby marks, which the model
reproduced well. Flood mark may be
less reliable at this location.
Located upstream of Smeaton Grange
Road culvert. Actual culvert blockage
during flood may have been greater
than the 10% blockage adopted as
part of the simulation.
The comparison in Table G1 also indicate a good correlation between simulated model
results and anecdotal reports of flooding and flood photographs. This includes reproducing
reported flood depths to within 0.1 metres at most locations.
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