OPW052025 Report - Part 2

Hydrology and waterway stability                Table 9.4.8.3 Criteria for assessment (part)
Performance Outcomes                                              Acceptable Outcomes                                                                           Response

Hydrology and waterway stability
PO10                                                              AO10
Development prevents increased bed and bank erosion and           The development is designed to:                                     Not applicable as no change to existing flow regimes are
sedimentation in receiving waterways by avoiding changes in low   (a)   limit the peak 1 year ARI event discharge within the          proposed
rate, peak flow run-off and flow duration.                              receiving waterway to the pre-development peak 1 year
                                                                        discharge;
                                                                  (b)   maximise pervious areas by using pervious alternatives for
                                                                        otherwise impervious areas wherever possible;
                                                                  (c)   provide for capture and reuse of stormwater for non-potable
                                                                        purposes for gardening, toilet flushing, laundry and hot
                                                                        water supply uses;
                                                                  (d)   incorporate appropriate detention features; and
                                                                  (e)   incorporate natural channel design principles

                                                                  Editor’s note: The Sustainable Building Design Code includes
                                                                  requirements for stormwater capture and reuse.