20220206 48 Elm St SWMP

DRAINS MODEL RESULTS - ROOFWATER PIPE WITH PROPOSED DEVELOPMENT - 1% AEP

DRAINS results prepared from Version 2023.11.8726.15750

PIT / NODE DETAILS                           Version 8
Name       Max HGL    Max Pond Max SurfaceMax Pond Min             Overflow Constraint
                      HGL       Flow ArrivingVolume     Freeboard (cu.m/s)
                                (cu.m/s) (cu.m)         (m)
C1             107.85                0.028
A-2            107.42     107.4      0.063          0.9          0      0.026 Outlet System
X2/X1          107.14    107.19      0.043          0.9          0          0 Outlet System
X3/X1           106.4                0.006
X1/X1          107.89       108      0.118          0.9       0.01          0 Inlet Capacity

SUB-CATCHMENT DETAILS
Name        Max        EIA       Remaining EIA   RIA                     PA        Due to Storm
            Flow Q     Max Q     Max Q     Tc    Tc                      Tc
            (cu.m/s) (cu.m/s) (cu.m/s) (cu.m/s) (min)                    (min)     (min)
Carpark / Landscaping
                 0.026         0     0.026     5                     5           5 1% AEP, 10 min burst, Storm 4
Roofwater        0.055     0.055         0     5                     5           5 1% AEP, 5 min burst, Storm 1
LOT 44           0.103     0.052     0.051     5                     5           5 1% AEP, 10 min burst, Storm 7



PIPE DETAILS
Name       Max Q      Max V      Max U/S Max D/S Due to Storm
           (cu.m/s) (m/s)        HGL (m) HGL (m)
OSD Outlet      0.024       0.53 107.758 107.416 1% AEP, 20 min burst, Storm 7
Pipe31334       0.103       1.46 107.273 107.141 1% AEP, 10 min burst, Storm 7
Pipe37243        0.11       1.55    106.92   106.4 1% AEP, 15 min burst, Storm 3
P38676          0.103       1.46 107.584 107.416 1% AEP, 10 min burst, Storm 7

CHANNEL DETAILS
Name     Max Q          Max V                              Due to Storm
         (cu.m/s)       (m/s)

OVERFLOW ROUTE DETAILS
Name       Max Q U/S Max Q D/S Safe Q     Max D     Max DxV Max Width Max V      Due to Storm
Overland Flow 0.026      0.026      1.484     0.047      0.05    1.27       1.06 1% AEP, 10 min burst, Storm 4
OSD Overflow 0.026       0.026      1.442     0.026      0.02       4       0.59 1% AEP, 10 min burst, Storm 7
OF51974        0.026     0.026      0.984     0.097      0.07    0.78       0.69 1% AEP, 15 min burst, Storm 6
OF52788            0         0      1.462         0         0       0          0
OF42857            0         0      1.605         0         0       0          0



DETENTION BASIN DETAILS
Name     Max WL    MaxVol            Max Q       Max Q     Max Q
                                     Total       Low Level High Level
OSD Tank       107.87           13.8       0.051     0.024      0.026

Run Log for DRAINS v2023.11.8726.15750 - 48 ELM ST DESIGN 240612
{\colortbl;\red0\green0\blue0;\red192\green0\blue0;}Run Log for DRAINS v2023.11.8726.15750 - 48 ELM ST DESIGN 240612.drn run at 14:14:03 on 13/6/2024 using Watercom Drains v2023.11.8726.15750



The maximum water level in these storages exceeds the maximum elevation you specified: OSD Tank.
DRAINS has extrapolated the Elevation vs Storage table to a higher Elevation. Please provide accurate values for higher elevations.

Upwelling occurred at: A-2
Freeboard was less than 0.15m at X2/X1, X1/X1
The maximum pond depth in these sag pits is unsafe: A-2\line
Flows were safe in all overflow routes.