Glen - REC13/0146 Flood Study BSM 30 April 2014. Email 2 Attachment 2

Subarea 36

QUDM std inlet time for 8% grade = 10 mins
70 m wq-swale & pipes @ 1% = 2 mins
Total : = 12 mins

Subarea 37

As per “Pre-Development” : 16 mins

 

Subarea 38
QUDM std inlet time for 1.5% grade = 15 mins
5-10 m pipe = 0 mins
Total: = 15 mins
Q=0.00278 x FxCxIx A (F = 0.80 / 0.85 / 0.95 / 1.00 / 1.05 / 1.15 / 1.20)
Subs Fi C10 Tc I (mm/hr) A Q (m3/s)

(min) 1/2/ 5 / 10 / 20/50 / 100 | (Ha) 1/ 2/5/10 / 20/50 / 100
0.30 | 0.76 16 80/90/ 120/140 / 158/ 183/202 | 2.25 | 0.30/ 0.36/ 0.54 / 0.67 / 0.79 / 1.00/ 1.15
0.60 | 0.82 10 97/109 / 147/171 / 194/224/245 | 0.29 | 0.05/0.06/ 0.09 / 0.11 /0.13 /0.17/0.19
9 0.00 | 0.70 5 121/137 /185 / 216 / 247 / 288/318 | 0.72 | 0.14/0.16/ 0.25 /0.30/ 0.36 / 0.46 / 0.53
10-18 | 0.50 | 0.80 14 84/96 / 128 / - / - / -/ - | 1.35 | 0.20/0.24/0.37/ ----/ ---- / ---- / ----
19 0.60 | 0.82 11 94/106 /143 / 166 / 189 / 218/238 | 0.37 | 0.06/0.08 / 0.11 /0.14/0.17/0.21 /0.24
20 0.00 | 0.70 5 121/137 / 185 / 216 / 247 / 288/318 | 0.99 | 0.20/0.22 / 0.34 / 0.42 /0.50/ 0.64 /0.74
29-35 | 0.46 0.79 20 71/80/106/ --- / --- / --- /--- | 3.09 | 0.39/0.46/0.68/ --- / --- / --- /---
36 0.45 0.79 12 92 /103 /138/ 160 / 183/211 /231 | 1.32 | 0.21/0.25/0.38/0.48 / 0.56 /0.70/0.80
37 0.08 0.72 16 80 /90/ 120/140 / 158 / 183/202 | 0.84 | 0.11/0.13 / 0.19 / 0.24 / 0.28 / 0.35 /0.41
38 0.60 | 0.82 15 82/92 /124/ 144/ 164/ 188/206 | 0.40 | 0.06/0.07 / 0.11 / 0.13 / 0.16 / 0.20 / 0.23

 

 

oo;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Brisbane Stormwater Management Pty Ltd Document File: ValkevSDF.Doc Page 28