17 Bottlebrush Avenue, · MCU26/0001

List of Tables and Figures




Table of Contents
Executive Summary ............................................................................................................................. 3

1        Introduction ................................................................................................................................ 4

         1.1     Background and Scope .............................................................................................................................. 4
         1.2     Stormwater Management Objectives and Design Approach .................................................................. 4
         1.3     Supporting Documentation and Reports ................................................................................................... 5
2        Existing Site ................................................................................................................................ 6

         2.1     Site Overview .............................................................................................................................................. 6
         2.2     Flow calculation using the Rational Method ............................................................................................. 6
         2.3     DRAINS model and comparison to Rational Method ................................................................................ 8
3        Proposed Development Works ................................................................................................. 11

         3.1     Proposed Site Description......................................................................................................................... 11
         3.2     Time of Concentration Inputs into DRAINS .............................................................................................. 11
         3.3     Hydrological Modelling Results ................................................................................................................ 12
         3.4     Stormwater Detention and Mitigation Strategy ...................................................................................... 14
4        Stormwater Quality .................................................................................................................. 16

         4.1     Erosion and Sediment Control ................................................................................................................. 16
5        Conclusion ................................................................................................................................ 17




    17 BOTTLEBRUSH AVENUE, NOOSA HEADS
                                                          7 January 2026
    Stormwater Management Plan
    Client Reference: P0433-25-001
    Prepared for Made Capital PTY LTD