20220206 48 Elm St SWMP

DRAINS RESULTS - DETENTION CALCS - 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              107.26               0.028
New Inlet Pit      107               0.057

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)
Pre-development0.063       0.027      0.035     5                     5           5 1% AEP, 10 min burst, Storm 7
Developed        0.072       0.06     0.019     5                     5           5 1% AEP, 5 min burst, Storm 1
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



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      0.023       1.2 107.645 107.074 1% AEP, 15 min burst, Storm 5

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     0.055      0.04    1.56       0.72 1% AEP, 10 min burst, Storm 4
High Flow Outlet 0.019   0.019      1.442     0.023      0.01       4       0.57 1% AEP, 15 min burst, Storm 5
OF1              0.061   0.061      1.479     0.041      0.02       4       0.59 1% AEP, 15 min burst, Storm 9



DETENTION BASIN DETAILS
Name     Max WL     MaxVol            Max Q       Max Q      Max Q
                                      Total       Low Level High Level
OSD Tank        107.85           13.5       0.041      0.023     0.019

Run Log for DRAINS v2023.11.8726.15750 - 48 ELM ST DETENTION CALCS
{\colortbl;\red0\green0\blue0;\red192\green0\blue0;}Run Log for DRAINS v2023.11.8726.15750 - 48 ELM ST DETENTION CALCS.drn run at 14:05:11 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.

Flows were safe in all overflow routes.