Landcom Book 4 Maintenance - WSUD

Water Sensitive Urban Design
6 | Construction Requirements
Watersteps | Victoria Park
The ultimate aim
of each option
is to protect the
functional elements
of the WSUD
element.
This section provides advice on the
construction of WSUD elements. In
particular, the advice concentrates on
the staging of construction in association
with other development in the catchment.
The construction advice is supported by
a series of checklists, which have been
developed to ensure critical design
elements are checked and signed off
as completed; hence minimising the
potential for expensive re-work.
6.1 Staging
The construction of WSUD elements
should be coordinated with other
construction activities within the
catchment. Construction activities
will generate greater loads of coarse
sediment and gross pollutants, for which
the WSUD treatment element is unlikely
to be designed for. High loadings of
coarse sediment and gross pollutants
can be particularly detrimental during
plant establishment for a vegetated
system, smothering infant vegetation and
changing the bathymetry of the element
(which in turns affects the hydraulic
function and the distribution of flow within
the treatment element).
The Water Sensitive Urban Design
Construction and Establishment
Guidelines (version 1) developed by Water
by Design (2009) a program of the South
East Queensland provides guidance
on the staged construction of WSUD
elements. Multiple options are presented
for each WSUD element, which assess:
1) The location of the WSUD element
(that is, streetscape, parkland);
2) The level of environmental protection
the system provides during staged
construction; and
3) The landscape amenity of the system
during staged construction.
The ultimate aim of each option is to
protect the functional elements of the
WSUD element. This is achieved by either
isolating the functional elements by
diverting stormwater flows or increasing
the capacity for sediment capture either
upstream or within the WSUD element.
For each option, construction and
establishment of WSUD elements is
divided into three stages:
Stage 1: Civil construction
(or functional installation)
Stage 2: Building phase protection
(or sediment and erosion
control)
Stage 3: Operational establishment
(civil and/or landscaping)
These are illustrated in Figure 7 together
with a list of corresponding management
forms contained in Appendix A.
38 Book 4 | MAINTENANCE