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

                                                                                                                        Flood Hazard Assessment
                                                                                               Intersection of Lake Macdonald Dr and Dianella Crt




CONTENTS
Executive Summary ................................................................................................................................. 1
1      Introduction .................................................................................................................................... 1
2      Available Data ................................................................................................................................. 3
3      Site Characteristics .......................................................................................................................... 4
    3.1         Catchment Characteristics..................................................................................................... 4
4      Hydraulic Modelling ........................................................................................................................ 6
    4.1         Model setup........................................................................................................................... 6
       4.1.1        Model boundaries ............................................................................................................. 6
    4.2         Future climate ....................................................................................................................... 6
    4.3         Model Roughness .................................................................................................................. 7
    4.4         Validation............................................................................................................................... 7
5      Flood Hazard ................................................................................................................................. 11
6      Sensitivity Analysis ........................................................................................................................ 17
    6.1         Manning’s n roughness sensitivity ...................................................................................... 17
    6.2         Culvert blockage sensitivity ................................................................................................. 19
7      Hydraulic Performance ................................................................................................................. 22
8      Summary of findings ..................................................................................................................... 23
Appendices .............................................................................................................................................. 1




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