Landcom Book 4 Maintenance - WSUD

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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
Water Sensitive Urban Design Stage 1: Civil Construction Pre start construction meeting Subdivision Construction FORM A Earthworks and hydraulic / Functional Structures FORM C (bioretention basin) Filter media and finished levels Stage 2: Building phase protection FORM B Erosion and Sediment Control Allotment Building (up to 30 percent completion) Stage 3: Operational establishment FORM C (wetland and sedimentation) Top soil and finished levels FORM D Landscape Planting Allotment Building (greater than 80 percent completion) Asset handover Asset handover checklist Completion of construction activities Figure 7: Staged construction of WSUD elements and the timing of relevant forms Book 4 | MAINTENANCE 39
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Level 2, 330 Church Street Parramat
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Landcom Book 4 Maintenance - WSUD

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