1674798050410_Y010-01 Driveway

                LEGEND                                                                                                         32
                      Flow Direction
                                                                                                                            SP188268
                     Catchment Zone


                                                                                                                           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;
                                                                                                                                                                                                         Velocity, V(m/s) = 0.51
                                                        A                                                       SP188268                                                                                 Discharge, Q (m³/s) = 0.004
                                                                                                                                                                                                         Resultant Depth at Invert is 20mm.

                                                                                           A                                                                                                             For Major Flow (1% Storm);
                                                                                                                                                                                                         Area, A(m²) = 0.014
                                                                                                                                                                                                         Wetted Perimeter P (m) = 1.126
                                                                                                                                                                                                         Kerb Grade, S(m/m) = 0.024
                                                                                                                                                                                                         Mannings Value 'n' = 0.014
                                                                                                                                                                                                         Resultant;
                                                                                                                                                                                                         Velocity, V(m/s) = 0.59
                                                        Reshape Landscape                                                                                                                                Discharge, Q (m³/s) = 0.008
                                                                                                                                                                                                         Resultant Depth at Invert is 25mm.
                                                         For Drainage over
            A                                                Driveway

                                                                               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          24/01/2023        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