Narellan Creek Overland Flood Study (Vol 1) - Flipbook - Page 96
ITEM
REVIEW OBSERVATIONS
COMMENTS/
RECOMMENDATIONS
inlet types referencing specific depth-discharge curves in the pit
database to represent various pit capacity. Stormwater pit data
from design plans include pit type/description information.
However, pits already included in the model do not include any
description on the pit type, which will require Streetview/aerial
imagery review.
Areas with missing pits and pipes were identified. 1D pits were
commonly present at these locations, indicating the presence of
stormwater network, but there are no 1D pipes connected to these
pits. Additional stormwater information required to ensure
overland flow is not overestimated due to the absence of these
network.
A few locations with missing culverts were identified. Based on the
depth results, deep depths are observed near upstream of the
culvert location, indicating water is ponding and overtopping road
crossings which is not a correct representation. Some of these
