Final Engineering services report _62 Lake Macdonald Drive · OPW25/0057

                                                                                             Flood Hazard Assessment
                                                                    Intersection of Lake Macdonald Dr and Dianella Crt



5         FLOOD HAZARD
Australian Rainfall and Runoff (ARR) A Guide to Flood Estimation, Book 6 – Flood Hydraulics
presents a series of general flood hazard curves based on depth and velocity, see Figure 7. The flood
hazard classifications of H1 to H6 describe the six classifications of flood hazard detailed in Table 5-1.
The depth velocity flood hazard classification limits are presented in Table 5-2.




Figure 7 - General flood hazard curves

Table 5-1 Flood hazard classifications

 Flood Hazard      Description
 Classification
 H1                Generally safe for vehicles, people and buildings

 H2                Unsafe for small vehicles

 H3                Unsafe for vehicles, children and the elderly

 H4                Unsafe for vehicles and people
                   Unsafe for vehicles and people. All building types vulnerable to structural damage. Some
 H5                less robust
                   building types vulnerable to failure.
 H6                Unsafe for vehicles and people. All building types considered vulnerable to failure.



Table 5-2 Depth and Velocity Vulnerability Threshold Classification Limits
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