20220206 48 Elm St SWMP

DRAINS MODEL RESULTS - EXISTING ROOFWATER PIPE - 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)
N3             107.93                 0.075
X1/X1           107.9        108      0.118           0.9          0          0 Outlet System
X2/X1          107.24      107.3      0.074           0.9          0      0.021 Outlet System
X3/X1           106.4                 0.031

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
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)
Pipe31334       0.103       1.46 107.583 107.245 1% AEP, 10 min burst, Storm 7
Pipe37243       0.119       1.68 107.008    106.4 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
OF51974     0.063      0.063     1.775     0.128       0.12    1.03       0.95 1% AEP, 10 min burst, Storm 7
OF42857          0         0     1.695          0         0       0          0
OF52788     0.021      0.021     1.462       0.09      0.06    0.72       0.66 1% AEP, 10 min burst, Storm 10



DETENTION BASIN DETAILS
Name     Max WL     MaxVol        Max Q       Max Q     Max Q
                                  Total       Low Level High Level

Run Log for DRAINS v2023.11.8726.15750 - 48 ELM ST EXISTING 240612
{\colortbl;\red0\green0\blue0;\red192\green0\blue0;}Run Log for DRAINS v2023.11.8726.15750 - 48 ELM ST EXISTING 240612.drn run at 14:10:40 on 13/6/2024 using Watercom Drains v2023.11.8726.15750

No water upwelling from any pit.
Freeboard was less than 0.15m at X2/X1, X1/X1
The maximum pond depth in these sag pits is unsafe: X2/X1\line
Flows were safe in all overflow routes.