20220206 48 Elm St SWMP

DRAINS MODEL NETWORK - DETENTION CALCS

PIT / NODE DETAILS                                       Version 15
Name       Type                        Family            Size                Ponding         Pressure Surface                 Max Pond                  Base             Blocking           x              y           Bolt-down      id         Part Full         Inflow     Pit is       Internal       Inflow is  Minor Safe Major Safe
                                                                             Volume          Change Elev (m)                  Depth (m)                 Inflow           Factor                                        lid                       Shock Loss        Hydrograph              Width          Misaligned Pond Depth Pond Depth
                                                                             (cu.m)          Coeff. Ku                                                  (cu.m/s)                                                                                                                           (mm)                      (m)        (m)
N3           Node                                                                                                                                                    0                           1157.62 -206.485                           11                     No
N4           Node                                                                                                                                                    0                          1179.959 -207.08                            12                     No
C1           Node                                                                                                     107.2                                          0                          1233.329 -204.522                       144269                     No
New Inlet PitNode                                                                                                    106.97                                          0                          1213.071 -230.765                      1942901                     No
Outlet       Node                                                                                                                                                    0                          1223.165 -233.85                       1942905                     No

DETENTION BASIN DETAILS
Name     Elev                          Surf. Area        Not Used            Outlet Type K                Dia(mm)             Centre RL                 Pit Family       Pit Type           x              y           HED            Crest RL   Crest Length(m) id
OSD Tank                       107.1                18                       Orifice                                   115                    107.16                                            1200.538       -208.57 No                                                146800
                               107.8                18

SUB-CATCHMENT DETAILS
Name     Pit or                        Total             EIA                 Perv            RIA          EIA                 Perv                      RIA              EIA                Perv           RIA         EIA            Perv       RIA               EIA            Perv     RIA            Rainfall
         Node                          Area                                  Area                         Time                Time                      Time             Length             Length         Length      Slope(%)       Slope      Slope             Rough          Rough    Rough          Multiplier
                                       (ha)              %                   %               %            (min)               (min)                     (min)            (m)                (m)            (m)         %              %          %
Pre-development
            N3                                  0.076                 43.3            28.1         28.6                  5                          5                5                                                                                                                                                 1
Developed N4                                    0.083                 69.2             6.5         24.3                  5                          5                5                                                                                                                                                 1
Carpark / Landscaping
            C1                                  0.031                    0              17           83                  5                          5                5                                                                                                                                                 1
Roofwater OSD Tank                              0.052                  100               0            0                  5                          5                5                                                                                                                                                 1

PIPE DETAILS
Name       From                        To                Length           U/S IL     D/S IL  Slope                            Type                   Dia          I.D.                      Rough          Pipe Is     No. Pipes      Chg From At Chg              Chg            Rl       Chg            RL               etc
                                                         (m)              (m)        (m)     (%)                                                     (mm)         (mm)                                                                                             (m)            (m)      (m)            (m)              (m)
OSD Outlet OSD Tank                    New Inlet Pit                   13       107.1 106.97                             1 uPVC, under roads, 1% minimum slope225                     242          0.012 NewFixed                  1 OSD Tank                  0

DETAILS of SERVICES CROSSING PIPES
Pipe       Chg                    Bottom                 Height of Service Chg               Bottom Height of Service Chg                               Bottom           Height of Service etc
           (m)                   Elev (m)                   (m)            (m)               Elev (m)  (m)            (m)                               Elev (m)            (m)            etc

CHANNEL DETAILS
Name     From                          To                Type                Length          U/S IL       D/S IL              Slope                     Base Width       L.B. Slope         R.B. Slope Manning         Depth          Roofed
                                                                             (m)             (m)          (m)                 (%)                       (m)              (1:?)              (1:?)      n               (m)

OVERFLOW ROUTE DETAILS
Name    From                           To                Travel              Spill           Crest        Weir                Cross                   Safe Depth       SafeDepth      Safe       Bed                   D/S Area                  id                U/S IL         D/S IL   Length (m)
                                                         Time                Level           Length       Coeff. C            Section                 Major Storms Minor Storms       DxV        Slope                 Contributing
                                                         (min)               (m)             (m)                                                      (m)              (m)            (sq.m/sec) (%)                   %
Overland Flow
           C1                          New Inlet Pit                   0.2                                                  7.5 m roadway with 3% crossfall and roll
                                                                                                                                                                  0.3top kerb    0.15        0.4                     1            0                       144282          107.2 106.97               20
High Flow Outlet
           OSD Tank                    New Inlet Pit                   0.1           107.8            1                 1.7 4 m wide pathway                      0.3            0.15        0.4                     2            0                       428772          107.8 106.97               16
OF1        New Inlet Pit               Outlet                          0.1                                                  4 m wide pathway                      0.3            0.15        0.4                     1            0                      1942904         106.97 106.852            11.8



PIPE COVER DETAILS
Name       Type                    Dia (mm)    Safe Cover (m) Cover (m)
OSD Outlet uPVC, under roads, 1% minimum slope
                                           242              0.5     -0.25 Unsafe



This model has no pipes with non-return valves