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Final Engineering services report _62 Lake Macdonald Drive · OPW25/0057
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Flood Hazard Assessment
Intersection of Lake Macdonald Dr and Dianella Crt
FIGURES
Figure 1 - 50% AEP design discharge comparison................................................................................... 7
Figure 2 - 10% AEP design discharge comparison................................................................................... 8
Figure 3 - 2% AEP design discharge comparison..................................................................................... 8
Figure 4 - 1% AEP design discharge comparison..................................................................................... 8
Figure 5 - 1% AEP (2100) design discharge comparison ......................................................................... 9
Figure 6 - 0.2% AEP design discharge comparison.................................................................................. 9
Figure 7 - General flood hazard curves ................................................................................................. 11
Figure 8 - Duration of inundation Reference Point 1............................................................................ 13
Figure 9 - Duration of inundation Reference Point 2............................................................................ 13
Figure 10 - Sensitivity analysis +/- 25% Manning's n 2% AEP at Reference Pt A .................................. 17
Figure 11 - Sensitivity analysis +/- 25% Manning's n 1% AEP at Reference Pt A .................................. 18
Figure 12 - Sensitivity analysis +/- 25% Manning's n 0.2% AEP at Reference Pt A ............................... 18
Figure 13 - Sensitivity analysis 25% culvert blockage for 10% AEP at Reference Pt A ......................... 19
Figure 14 - Sensitivity analysis 50% culvert blockage for 2% AEP at Reference Pt A............................ 20
Figure 15 - Sensitivity analysis 50% culvert blockage for 1% AEP at Reference Pt A............................ 20
Figure 16 - Sensitivity analysis 50% culvert blockage for 0.2% AEP at Reference Pt A ........................ 21
ii
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