Narellan Creek Overland Flood Study (Vol 1) - Flipbook - Page 43
Narellan Creek Catchment
Flood Study
Plate 10
Four-day rainfall totals for NSW for June 2016 event (Bureau of Meteorology, 2016)
Table 8
Historic Rainfall Statistics
Dates
Catchment Rainfall (mm)
Event
Start
End
Minimum
Average
Maximum
June 2016
3rd Jun
7th Jun
280
293
310
March 2022
1st Mar
8th Mar
410
422
430
July 2022
st
th
195
215
230
1 Jul
6 Jul
Accumulated rainfall totals for each rainfall gauge that was operational during the 2016
event were used to develop a rainfall isohyet (i.e., rainfall depth contour) map for the event,
which is shown in Figure 8.
The isohyet map and information included in Table 8 indicates that there was some spatial
variation in rainfall across the catchment during the 2016 event, with rainfall totals across
the eastern (i.e., upstream) sections of the catchment being larger than across the western
catchment areas. In recognition of the variation in rainfall across the catchment during this
event, all rainfall gauges that were active during the event were incorporated into the
WBNM model (this included daily and sub daily gauges). The total rainfall depths that were
applied to each subcatchment as part of the simulation is summarised in Appendix F.
The temporal (i.e., time-varying) distribution of rainfall was determined based on the closest
continuous rainfall gauge that provided reliable recorded rainfall information for the event.
This was determined to be the Camden Golf Course gauge (Gauge #568156) which is
contained within the catchment.
The continuous rainfall information was also analysed relative to design rainfall-intensityduration information for the catchment. This information is presented as Figure E1 in
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