Attachment C - Stormwater report

Figures
Figure 1 - Site Location                                                                                        6
Figure 2 – Pre-Development Topography                                                                           7
Figure 3 – Hydroponic Tomato Setup                                                                              8
Figure 4 – Drip Irrigation System                                                                               8
Figure 5 - Catchment Plan.                                                                                     11
Figure 6 - Land Use Mapping for Catchment (Source QLUMP).                                                      12
Figure 7 - MUSIC Model Layout.                                                                                 15
Figure 8 – Pre- vs Un-Mitigated Post-Development Hydrographs – 1% AEP Event.                                   23
Figure 9 – A Comparison of the Runoff Volumes for the Pre- (left) and Post-Development (right) Scenarios.      24
Figure 10 - 1% AEP Hydrographs - Site vs Regional.                                                             25



Tables
Table 1 – Meteorological and Rainfall Runoff Data.                                                              10
Table 2 – MUSIC Monthly Evapotranspiration Data (mm).                                                           10
Table 3 – Summary of Landuse and Fraction Impervious.                                                           13
Table 4 – Rainfall-runoff Parameters for MUSIC Source Nodes.                                                    14
Table 5 – Pollutant Export Parameters for Urban, Industrial, Mining and Waste, Forest and Agriculture Source Nodes
     (extracted from Table 3.9, Water by Design, 2010).                                                         14
Table 6 – Results from MUSIC Modelling.                                                                         15
Table 7 – Pollutant export parameters for Roof source nodes (extracted from Table 3.8, Water by Design, 2010).  16
Table 8 – Water Quality Objectives.                                                                             16
Table 9 – Bioretention System Input Parameters                                                                  18
Table 10 – Media Filtration Input Parameters.                                                                   18
Table 11 – Infiltration System Input Parameters.                                                                19
Table 12 – MUSIC Modelling Results – Receiving Node                                                             20
Table 13 – IFD Data Applied to Hydrologic Assessment                                                            21
Table 14 – Performance of Mitigation Measures – Peak Flow Rate at LPD                                           23
Table 15 – Erosion Risk Categories                                                                              26
Table 16 – Estimated Soil Loss and Risk Categorisation for Varied Slope Lengths and Grades                      27
Table 17 – Stabilisation Materials                                                                              27
Table 18 – Sediment Control Standard based on Soil Loss Rate                                                    28
Table 19 – Roles and Responsibilities                                                                           29



Appendices
Appendix A     Site Layout (Martoo Drawing Number)                                                              A
Appendix B     Assessment of Historic Nutrient Loads                                                            B




Stormwater Management Plan – Lot 1 on SP108094, 305 Lake Macdonald Drive                                    Page v

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