Appendix 4- SWMP

Water Retention & Detention Discharge
Tank Dimensions
Volume
Height

7500 L
1250 mm
Roof Area 122 m*
Roof ToC 5 min
c 09

Retention Depth
Retention Volume
Detention Volume

Pre - Development
Catchment Details
0.03035 ha
fi oat fi
0.781054366 c10
752 ho

‘Area 0.02425
0.85
087

mmr 52

DETENTION TANK DISCHARGE ESTIMATES (L/s)

Smin
volume (L)

ceasom reawnatice cy yim) oy Us)

0.55 m
3300 L
4200 L

Post - Development
‘Tank Bypass Catchment Details

ha

smavhr

SminStage Outlet Flow

(a)

(us)

 

 

0.80
0.85
0.95
1.00

07
o77
0.855
0.90
105 0.945
1s. 1.00
1.20 1

120 1.00

126
35720
1968
22680
259.2
30120
3336
40032

3074
408
5.102
692
8301
1021
11.305
1357

9222
122250
an06
2075.10
24903
3062.10
33915
4069.80

6%
osey
o2ey
010
3%
0.02
1%

1%2100

0.704
075
0.835,
0.90
0.965,
06
1s
123

051
059

03)
om|
aan
2a9
2.96
an

 

Pre-Development Whole ite Peak Discharges

Y

‘Area (ha) ly (mh) ays) thers

Frequency
earthy

Outlet Rating Curve
2500

2000

°

° as 1 1s 2 25 3

—1ow MID. ——HGH —Weir QTOTAL

Post-Development Whole ite Peak Discharges

Y

Tank outfow

yim) TOMO Totals

Bypass Area (ha) Discharge (is)

ty (mv)

 

0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030

0.624843493
0.66
0.742001647
078
0820107084
0.90
0937265239
0937

1260
1s72
1968
268
259.2
3012
326
400.3

6637
8.799
aan
14934
anga
22,808
26.36
3162

63.20%

39.35%
18.14%
10%
o%
%

1%
1% 2100

 

 

0.80
0.85
0.95
1.00
105
1s.
1.20
120

 

 

0.024
0.024
0.024
0.024
0.024
0.024
0.024
0.024

0.70
074
0.83
07
oa

126.00
35720
196.80
22680
259.20
30120

333.600

400.320

591
103

10.96
1329
15.95
2029

22412

26.966

051
059
070
on
un
249
2.96
3720

6.417
az.
a.6s7
14.061
17.060

11.000
11.000

 

Outlet Rating Curve Calculations
Pipel - Pipe2_—SPipe3
Low MID HIGH

Invert 0.55 0.97 1.35

Height 0 0 ON/A
Width 0 0 0

Diameter 25 50 100 N/A

Area 490.87385 1963.4954 7853.9816 N/A
Number 1 1 1

H Q Q Q Q

0.05

oO.

0.15

02

0.25

03

0.35

04

0.45

05

0.55 0

0.6 0.2917129

0.65 0.4125444

0.7 0.5052616

0.75 05834258

0.8 0.652899

0.85 0.7145478

0.9 0.771798

0.95 0.8250887 0

1 0.8751387 0.9038394

1.05 0.924772 1.4759636

1.1 0.9675023 18814917

1.15 1.0105232 22139453

1.2 1.0517859 2.502618

1.25 1.0914898 2.761275

1.3 11297993 2.976962

1.35 1.168516 3.216788 0

14 1.2027631 34218807 4.6674066

1.45 1.2376331 3.6153576 6.6007097

15 12715471 3.7989937 8.0841854

155 13045798 3.9741535 93348132 0

1.6 13367965 4.1419125 10.436638 8.37261

1.65 1.3682548 4.303363 11.432765 31.6874

1.7 1399006 4.4585339 12.348797 63.4249

1.75 14290956 4.6086947 13.201419 101.746

1.8 14585646 4.7541151 14.0222 145.667

1.85 14874498 4.8952173 14.759636 194.548

1.9 15157848 5.0323648 15.480036 247.928

1.95 15435996 5.1658725 16.168371 305.457

2 15709221 5.2960156 16.828574 366.854

2.05 15977774 5.4230364 17.463836 431.888

2.1 1.6241888 5.5471494 18.076788 500.368

2.15 1.6501774 5.6685456 18.669626 572.127

2.2 1.6757631 5.787396 19.24421 647.023

2.25 1.700964 5.9038542 19.802129 724.928

2.3 1.7257969 6.0180593 20.344754 805.731

2.35 1.7502775 6.1301371 20873277 889.331

2.4 1.7744204 6.240202 21.388744 975.638

2.45 1.7982392 6.3483593 21.892077 1064.57

25 18217466 6.4547044 2.384096 1156.05

Weir

1.565
mm
750 mm
mm
mmé

Qrom

ecocococoe
ecco eococoe

0
0.29171
0.41254
0.50526
0.58343
0.65229
0.71455

0.718
0.82509
1.77898
2.39844
2.84899
3.22447

3.5544
3.85276

4.1275
4.38364
9.29205
11.4537
13.1547
14.6135,

24.288
48.7916
81.6312
120.985
165.882

215.69
269.956
328.335,
390.549
456.373
525.616
598.116

673.73
752.335,
833.819
918.085
1005.04
1094.61
1186.71

ecocesc occ coc ooo CoS

ecooo ee occ eC CoCo CC COCO OCCC OOS
ecoocecec occ eco c CCC COC CC OO COC OCCC OOS