20220206 48 Elm St SWMP

DRAINS RESULTS - DETENTION CALCS - 2% 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               0.025
New Inlet Pit      107               0.044

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-development0.057       0.025      0.032     5                     5           5 2% AEP, 10 min burst, Storm 7
Developed        0.065     0.055      0.017     5                     5           5 2% AEP, 5 min burst, Storm 1
Carpark / Landscaping
                 0.023          0     0.023     5                     5           5 2% AEP, 10 min burst, Storm 4
Roofwater         0.05       0.05         0     5                     5           5 2% 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      0.022       1.19    107.63 107.073 2% AEP, 15 min burst, Storm 6

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 0.023      0.023      1.484     0.053      0.04    1.48       0.72 2% AEP, 10 min burst, Storm 4
High Flow Outlet 0.009   0.009      1.442     0.017      0.01    1.73       0.59 2% AEP, 15 min burst, Storm 6
OF1              0.049   0.049      1.479     0.038      0.02       4       0.53 2% AEP, 15 min burst, Storm 6



DETENTION BASIN DETAILS
Name     Max WL     MaxVol            Max Q       Max Q      Max Q
                                      Total       Low Level High Level
OSD Tank        107.83           13.2       0.031      0.022     0.009

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 14:03:49 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.