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

                                                                                             Flood Hazard Assessment
                                                                    Intersection of Lake Macdonald Dr and Dianella Crt



7         HYDRAULIC PERFORMANCE
The hydraulic performance of the waterway crossing intersection is summarised in Table 7-1.

The hydraulic performance is based on the adopted flood model parameters and does not include
potential significant blockage of the culverts.

Table 7-1 - Hydraulic performance of intersection culverts

                                     Discharge              Depth      Velocity     Water
             AEP                                                                   surface
                             Culverts        Weir           Weir        Weir      elevation*
    (%)            (1in x)    (m3/s)         (m3/s)          (m)        (m/s)      (m AHD)

    0.2             500       11.1           18.8           0.16        1.79        103.8

  1 (2100)     100 (2100)     10.7           15.8           0.14        1.69       103.77

     1              100       10.3               8.2        0.07        1.36       103.67

     2               50       10.1               5.7        0.05        1.21        103.6

     10              10        8.7               0          0.00        0.00        103.3

     50              2         3.7               0          0.00        0.00        102.5
* Upstream face




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