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Rank 1 Rank 1 to 2 Rank 1 to 5 Rank 1 to 10 Rank 1 to 20 All Data Top 10 Historical Floods 1962-2012 (~Rank1-20) J:\Jobs\113031\FFA\Processed Data\Flike_FFA_results_all_2 100000 Estimated Discharges (year)

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1 in X AEP HAWKESBURY-NEPEAN FIGURE 8 REGIONAL FLOOD STUDY HYDROLOGIC MODEL LAYOUT FINAL REPORT RORB JULY 2019

B121 Brooklyn B118 Spencer Pa B120 M cif B119 oto ic rw ay B117 Pacific Ocean ry u b s e r k e B116 w iv Parramatta M115 a R H B77 B76 M111 B101 M114 Cattai B104 B78 S74 M112 B75 W52 M107 M110 Lower Portland B100 River S73 Macdonald B103 Windsor W46 M113 S72 S71 W53 M108 B70 O B102 e n H ld M106 M109 N h er W54 W47 epean T h H um W51 River rt d ig o a h e North Richmond N o w W44 Colo R ay W48 rke U99 P62 W57 W56 W45 Bu B69 B63 iver Heights W43 R U98 t W42 U92 ea W55 Nowra M105 e r n G68 G r P60 P40 n te i d y es a W50 L a w W Warragamba W49 o h s g l G67 i l R H

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J Km \ : J J:\Jobs\113031\_Stage4\MonteCarlo\crude\ror_file_creation\mc_inputs\data\spatial_pattern\Figure10_Spatial_Distribution_plot.xlsx 0.8 This plot shows the proportion of rainfall produced in each portion of the catchment, resulting from 0.7 variation of the spatial pattern.

0.6

0.5

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0.0 10 FIGURE Warragamba Catchment Nepean Catchment Grose/South Creek Catchments Colo Catchment Sub -Area Mean Example Spatial Pattern J:\Jobs\113031\_Stage2\ModellingFramework\mc_inputs\data\temporal_pattern\temporal_pattern_plot.xlsx 350 This plot shows the 17 three day temporal patterns from the Extreme Storm Database. These are sampled randomly and applied to all AEPs. 300

250

200

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0 FIGURE 11 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Time (%) Temporal pattern (three day) J:\Jobs\113031\_Stage4\Excel\Interim_FS\Figure12_ARF.xlsx 1.10 ARR 1987 24 Hour 50% AEP 24 Hours ARR 1987 did not provide ARFs for larger catchment 1% AEP 24 Hour areas > 1000km2. 1.05 50% AEP 72 Hour The ARFs provided in ARR 1987 were independent of 1% AEP 72 Hour AEP. New ARFs are only AEP dependent from Hawkesbury Nepean Catchment Area To Penrith durations greater than 18 hours. 1.00

0.95

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A local catchment flooding or local overland flooding.

\ Flood Extent 4 e g Flood behaviour information is subject to change as a result of new data, 1 in 5 AEP a t

S methods and technology. 1 in 100 AEP _ \

1 BLIGH PARK 3 The mapped flood information excludes the impacts of climate change and PMF 0 3

1 implementation of potential flood mitigation measures. 1 \ s 0 0.5 1 2 3 4 b Any flooding information within the banks of or streams should not be o

J km \

: used for any assessment (other than flood extents) without detailed investigation. J HAWKESBURY-NEPEAN VALLEY FIGURE 17 REGIONAL FLOOD STUDY FLOOD EXTENTS FINAL REPORT PENRITH LAKES PENRITH JULY 2019 Notes: The mapped flood information represents Hawkesbury-Nepean mainstream regional flooding including backwater effects, but does not include local catchment flooding or local overland flooding.

Flood behaviour information is subject to change as a result of new data, methods and technology.

A The mapped flood information excludes the impacts of climate change and ndrews Rd implementation of potential flood mitigation measures.

Any flooding information within the banks of rivers or streams should not be

d used for any assessment (otd her than flood extents) without detailed investigation.

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: T J HAWKESBURY-NEPEAN VALLEY FIGURE 18 REGIONAL FLOOD STUDY FLOOD EXTENTS FINAL REPORT WALLACIA JULY 2019 Notes: The mapped flood information represents Hawkesbury-Nepean mainstream regional flooding including backwater effects, but does not include local catchment flooding or local overland flooding. Wallacia Weir Flood behaviour information is subject to change as a result of new data, d methods and technology. R

a o The mapped flood information excludes the impacts of climate change and g l u implementation of potential flood mitigation measures. M Elizabeth Dr Any flooding information within the banks of rivers or streams should not be WALLACIA used for any assessment (other than flood extents) without detailed investigation.

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A 2.5 - 5 \ Flood behaviour information is subject to change as a result of new data, 4 e methods and technology. 5 - 10 g a t

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1 Any flooding information within the banks of rivers or streams should not be 1 \ s used for any assessment (other than flood extents) without detailed investigation. 0 0.5 1 2 3 4 b o Flood depths are indicative only. To determine the depth of flooding at a particular

J km \ : location, the flood level should be compared to a surveyed ground level. J HAWKESBURY-NEPEAN VALLEY FIGURE 21 REGIONAL FLOOD STUDY FLOOD DEPTHS FINAL REPORT PENRITH LAKES 1 IN 5 AEP EVENT JULY 2019 PENRITH Notes: The mapped flood information represents Hawkesbury-Nepean mainstream regional flooding including backwater effects, but does not include local catchment flooding or local overland flooding.

Flood behaviour information is subject to change as a result of new data, A methods and technology. ndrews Rd The mapped flood information excludes the impacts of climate change and implementation of potential flood mitigation measures.

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a Flood mapping over PenritRh Lakes is indicative only as the flood modelling C does not incorporate the latest infrastructure of the Penrith Lakes Scheme.

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: T J HAWKESBURY-NEPEAN VALLEY FIGURE 22 REGIONAL FLOOD STUDY FLOOD DEPTHS FINAL REPORT 1 IN 5 AEP EVENT JULY 2019 WALLACIA

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p local catchment flooding or local overland flooding. a GREENDALE Depth (m) M c r Flood behaviour information is subject to change as a result of new data, 0 - 1 A \ methods and technology. S I 1 - 2.5 G c r The mapped flood information excludes the impacts of climate change and 2.5 - 5 A \ implementation of potential flood mitigation measures. 4

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J km \ : hydrologic approach and the mapping is based on a 1d hydraulic model. J