Narellan Creek Overland Flood Study (Vol 1) - Flipbook - Page 48
Narellan Creek Catchment
Flood Study
Blockage
As the March 2022 rainfall was generally less than a 5% AEP event, the design blockage
factors were assigned based on this frequency (i.e., third last column in Appendix D).
For stormwater pits, a 20% blockage factor was applied to
