Storm Water management plan · MCU12/0133.03

Noosa Council documents


                  Bligh Tanner Consulting Engineers
                  Noosa Flexi Learning Centre Stormwater Management Plan
                  August 2012



                            Stored water used for irrigation and other purposes (Y/N)                  Y
                            PET
                            PET – Rain
                            Indoor connections e.g. toilet, laundry etc.                               0.94
                            Indoor demand (kL/day)                                                     0.94
                            Outdoor demand (kL/yr)                                                     384
                            Daily demand (kL/day)                                                      0.94
                            Monthly distribution of annual demand (kL/day)
                            Confirmation that K and C* remain default? (Y/N)                                    Y


                  Table B11 Infiltration node reporting table
                            Infiltration System
                            Catchment ID                                                               Treatment node 1       Treatment node 2
                                                                                                                              (etc.)
                            Water quality objectives (WQO’s) must be achieved prior                    (note the discussion on design objectives in
                            to stormwater entering an infiltration system i.e.                         Chapter 2)
                            infiltration systems cannot be use to demonstrate
                            compliance with WQO’s. Has compliance been achieved
                            prior to using this node? (Y/N)
                            Is the exfiltration rate justified                                         Yes
                                                                                                       Notwithstanding construction controls, the
                            Can the hydraulic conductivity of the in-situ soils be guaranteed even
                                                                                                       hydraulic conductivity of sand is relatively
                            during earthworks?
                                                                                                       insensitive to compaction.
                            If “no” was answered to any of the above questions this node cannot be used.
                                                          2
                            Pond surface area (m )                                                     200                    200
                            Extended detention depth (m)                                               0.1                    0.1
                                               2
                            Filter area (m )                                                           200                    200
                            Unlined filter media perimeter (m)                                         400                    400
                            Depth of infiltration media (m)                                            0.3                    0.3
                            Exfiltration rate (mm/hr)                                                  180                    180
                            Overflow weir width (m)                                                    50                     50
                            Evaporative loss as % of PET                                               25                     25
                            Confirmation that K and C* remain default? (Y/N)                           y                      y


                  Table B12 Porous pavement node reporting table
                             Porous Pavements
                            Catchment ID                                                               Treatment node 1
                            Is direct rainfall modelled as a separate source node with                 Y
                            a 100% impervious fraction? (Y/N)?
                            Is the biofilter filter area set to represent the opening                  It is assumed at
                            area of the permeable paving or void ratio of porous                       25% of total
                            pavement (not the total surface area)? (Y/N). This should                  carpark area
                            be estimated from the product specifications.
                            Is the extended detention depth set to 0 m?                                Y
                            Is the filter depth set to represent the treatment area only (should not   Y
                            include the depth of the drainage layer)
                            Is the vegetation property set to “unvegetated”?                           n/a
                                                   2
                            Surface area (m )                                                          92.5
                            Has the filter area been calculated appropriately (Y / N /                 Y
                            N/A)




                                                                                                                                  Print Date: 2 March 2020, 2:19 PM