Appendix B - Y010-01 · OPW21/0219

                   LEGEND                                                                                                        32
                         Flow Direction
                                                                                                                              SP188268
                        Catchment Zone


                                                                                                                             The Rational Method (CTM1) - Minor Storm.

                                                                                                                             Q = (C . I . A)/360
                                                                                                                                                                                                           Minor Storm for CMT 2 (10%)
                                                                                              PROPOSED M1                    Q = Peak Flow Rate (m3/s)
                                                                                                                                                                                                           Intensity (5 min) = 226mm/hr
                                                                                              TYPE KERB TO REPLACE           C = Coefficient of Discharge (QUDM Section 4.5 (c10))
                                                                                                                                                                                                           From Table 4.5.1 Fi = 0.9
                                                                                                                             Iy = Rainfall Intensity (mm/hr)
                                                                                              EXISTING KERB.                 A = Area in Hectares (Ha)
                                                                                                                                                                                                           From Table 4.5.2 Fy = 1.0 (Minor Storm 10% AEP)
                                                                                                                                                                                                                                         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;
                                                                                                                             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
                                                                                                                             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))
                                                                                                                             Therefore;
                                   CTM1                                                                                      Q = (1.05x332x0.017)/360 = 0.0165 m3/s or 16.5 L/s




                                                                                                                           31
                                                                                                                        SP188268                    A                                                                     A
                                                               CTM2         A                                                                           Driveway 5%                                Road 3%
                                                                                      A
                                                                                                                                                                          SECTION A-A

                                                                                                                                                        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
       EXISTING KERB            CUT ALONG SEAM
                                ROAD SURFACE
                                                                                                                                                        Resultant;
                                                                                                                                                        Velocity, V(m/s) = 0.51
                                                                                                                                                        Discharge, Q (m³/s) = 0.004
                                                                                                                                                        Resultant Depth at Invert is 20mm.
       REPLACE WITH              NEW SEAM TO BE SEALED
    KERB PROFILE 'M1'            WITH 'ASPHALT CRACK FILLER'                                                                                            For Major Flow (1% Storm);
  FOOTPATH                                                                                                                                              Area, A(m²) = 0.014
                                 ROAD SURFACE
                                                                                                                  30                                    Wetted Perimeter P (m) = 1.126
                                                                                                                                                        Kerb Grade, S(m/m) = 0.024
                                                                                                               SP188268                                 Mannings Value 'n' = 0.014
                                                                                                                                                        Resultant;
                                                                                                                                                        Velocity, V(m/s) = 0.59
             PROPOSED M1 KERB PROFILE                                                                                                                   Discharge, Q (m³/s) = 0.008
                  IPWEA RS-080.                                                                                                                         Resultant Depth at Invert is 25mm.



                                                                      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           30/06/2022       3847 - 01
                                           design &                                                                                                                                                                                K.A.J
                                                                                                                                                                                BEng, MIEAust, RPEQ 7198       Drawn by
email: [email protected]                                                                                                                                                  For & on behalf of AAA
                                                                                                                  DRIVEWAY PROPOSAL                                          Design & Development Consulting   Checked by          D.L.T.   Scale @ A3                 1:100