Approved Plan OPW22-0273 · OPW22/0273

                      LEGEND                                                                                                                                                                                                                NOOSA COUNCIL
                               Flow Direction
                                                                                                                                                    32                                                                                      APPROVED PLAN
                             Catchment Zone                                                                                                      SP188268                                                                                OPW22/0273 13 MAR 2023
                                                                                                                                                                                                                                           Subject to Conditions
                                                                                                                                              The Rational Method (CTM1) - Minor Storm.

                                                                                                                                              Q = (C . I . A)/360
                                                                                                                                                                                                                           Minor Storm for CMT 2 (10%)
                                                                                                                                              Q = Peak Flow Rate (m3/s)
                                                                                                                                                                                                                           Intensity (5 min) = 226mm/hr
                                                                                                                                              C = Coefficient of Discharge (QUDM Section 4.5 (c10))
                                                                                                                                                                                                                           From Table 4.5.1 Fi = 0.9
                                                                                                                                              Iy = Rainfall Intensity (mm/hr)
                                                                                                                                                                                                                           From Table 4.5.2 Fy = 1.0 (Minor Storm 10% AEP)
                                                                                                                                              A = Area in Hectares (Ha)                                                                                  1
                                                GARAGE                                                                                        Minor Storm for CMT1 (10%)
                                                                                                                                                                                                                           From Table 4.5.3 C10 = 0.88 (10
                                                                                                                                                                                                                           a 1 in 10 year ARI (74mm/hr))
                                                                                                                                                                                                                                                           = one hour rainfall intensity for

                                                                                                                                              Intensity (5 min) = 226mm/hr
                                                                                                                                                                                                                           Therefore;
                                                                                                                                              From Table 4.5.1 Fi = 0.9
                                                                                                                                                                                                                           Q = (0.88x226x0.0081)/360 = 0.00447 m3/s or 4.47 L/s
                                                                                                                                              From Table 4.5.2 Fy = 1.0 (Minor Storm 10% AEP)
             EXISTING                                                                                                                                                       1
                                                                                                                                              From Table 4.5.3 C10 = 0.88 (10 = one hour rainfall intensity for
                                                                                                                                                                                                                           Resultant Depth in Kerb at A-A = 20mm.

                                                                                                                                              a 1 in 10 year ARI (74mm/hr))
              HOUSE                                                                                                                           Therefore;
                                                                                                                                                                                                                           Major Storm for CMT2 (1%)
                                                                                                                                                                                                                           Intensity (5 min) = 332mm/hr
                                                                                                                                              Q = (0.88x226x0.017)/360 = 0.0094 m3/s or 9.4 L/s                            From Table 4.5.1 Fi = 0.9
               19                                                                                                                             Major Storm for CMT1 (1%)
                                                                                                                                                                                                                           From Table 4.5.2 Fy = 1.2 (Major Storm 1% AEP)
                                                                                                                                                                                                                                                         1
                                                                                                                                                                                                                           From Table 4.5.3 C10 = 0.88 (10 = one hour rainfall intensity for
            SP188268                                                                                                                          Intensity (5 min) = 332mm/hr
                                                                                                                                              From Table 4.5.1 Fi = 0.9
                                                                                                                                                                                                                           a 1 in 10 year ARI (74mm/hr))
                                                                                                                                                                                                                           Therefore;
                                                                                      Reshape Existing                                        From Table 4.5.2 Fy = 1.2 (Major Storm 1% AEP)
                                                                                                                                                                            1
                                                                                                                                                                                                                           Q = (1.05x332x0.0081)/360 = 0.0078 m3/s or 7.85L/s
                                                                                    Landscape to Ensure                                       From Table 4.5.3 C10 = 0.88 (10 = one hour rainfall intensity for            Resultant Depth in Kerb at A-A = 25mm.
                                                                                                                                              a 1 in 10 year ARI (74mm/hr))
                                                                                      Overland Flow.
                                                                                                                                              Therefore;
                                                CTM1                                                                                          Q = (1.05x332x0.017)/360 = 0.0165 m3/s or 16.5 L/s                           Using Mannings Equation for Kerb Depth A-A.
                                                                                                                                                                                                                           For Minor Flow (10% Storm);
                                                                                                                                                                                                                           Area, A(m²) = 0.009
                                                                                                                                                                                                                           Wetted Perimeter P (m) = 0.9
                                                                                                                                                                                                                           Kerb Grade, S(m/m) = 0.024
                                                                                                                                                                                                                           Mannings Value 'n' = 0.014

                                                         CTM2                                                                         31                                                                                   Resultant;
                                                                                                      ALIGNMENT OF LOW                                                                                                     Velocity, V(m/s) = 0.51
                                                                   A                                POINT IN DRIVEWAY ON
                                                                                                                                   SP188268                                                                                Discharge, Q (m³/s) = 0.004
                                                                                                                                                                                                                           Resultant Depth at Invert is 20mm.
                                                                                                       CONTINUATION OF
                                                                                                     A
                                                                                                    LOWPOINT  IN DRIVEWAY                                                                                                  For Major Flow (1% Storm);
                                                                                                           OF No 14                                                                                                        Area, A(m²) = 0.014
                                                                                                                                                                                                                           Wetted Perimeter P (m) = 1.126
                                                                                                                                                                                                                           Kerb Grade, S(m/m) = 0.024
                                                                       Flow Path                                                                                                                                           Mannings Value 'n' = 0.014
                                                                                                                                                                                                                           Resultant;
                                                                                                                                                                                                                           Velocity, V(m/s) = 0.59
                                                                                              Reshape Landscape                                                                                                            Discharge, Q (m³/s) = 0.008
                                                                                               For Drainage over                                                                                                           Resultant Depth at Invert is 25mm.
                                                                                                   Driveway
                                                             Neighbouring
                                                                  Existing
                 A                                        Driveway Invert.
                                                                                                 Existing Driveway                      Match to Existing




                                                                                                                                                                                                  40mm Invert
     Boundary




                                                                                                                                                                                                                                                                                     A
      Property




                                                                                                        5.7%                            Driveway
                                                                                                                                                                                                                                                                  Existing
                                                                                                                                                        Proposed Driveway
        380




                                                                                                                                                                                                                                                                  Kerb
                                                                                                                                                               12%                                                  Proposed Driveway
                                                                                                                                                                                                                           3.0%                                         Road 3%

                                                                       3600                                                                                  1754                                                                     1246

                                                                                                                                  SECTION A-A
                                                                              No.          Description                Date        JA Young                                                      APPROVED
       AAA Design & Development Pty Ltd                                                                                                                                                         Jose David Lesmes Tirado              STORMWATER CALCULATIONS
       34/13 Norval Court, MAROOCHYDORE, QLD 4558                                                                                 12 Grosvenor Tce,
                                                                                                                                                                                                                               Project number Y010-01
       Tel/Fax: (07) 5479 6747
                                                                                                                                  NOOSA HEADS QLD 4567
       Mob:      0422 039 247                                                                                                                                                                                                  Date          03/02/2023         3847 - 01A
                                                  design &                                                                                                                                                                                        K.A.J
                                                                                                                                                                                                BEng, MIEAust, RPEQ 7198       Drawn by
       email: [email protected]                                                                                                                                                           For & on behalf of AAA
                                                                               A           Driveway Amend            24/01/2023   DRIVEWAY PROPOSAL                                          Design & Development Consulting   Checked by         D.L.T.   Scale @ A3                 1:100

Document Set ID: 22334920
Version: 1, Version Date: 08/03/2023