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MCU14/0106 Appendix E - Engineering Report
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Project Title: Noosa Civic
Subject: Rational Method Hydrology Calculations - Catchment C Job No.: J13041
Designer: Benjamin C Check: Date: 22/8/2014 Page: 1 1
Rain Fall Data Used:
Location: NOOSA, BOM
AR&R Vol 2 1987 Parameters Time (hrs) i2 (mm/hr) i50 (mm/hr)
Skewness 0.10 1 51.60 96.00
F2 4.40 12 10.20 24.50
F50 17.60 72 3.40 8.90
Column and Variable Definition
Variable ARI (years)
1 2 5 10 20 50 100
fy 0.80 0.85 0.95 1.00 1.05 1.15 1.20
Catchment Data for Existing Catchment Conditions
Variable Value Unit
Area 2.57 ha
fi 0.263 Fraction
C10 0.753 Fraction
Catchment Discharges for Existing Catchment Conditions
Adopted Time: 15 Minutes (or 0.25 hours)
Variable ARI (Years)
1 2 5 10 20 50 100
fy 0.80 0.85 0.95 1.00 1.05 1.15 1.20
Intensity 82.1 104.8 131.0 146.2 166.8 194.0 214.8
Discharge 0.35 0.48 0.67 0.79 0.94 1.20 1.38
Calculation Type: QUDM Type 1 (C)
Version: EX.970907
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