Landcom Book 4 Maintenance - WSUD

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Water Sensitive Urban Design 5 | Monitoring and Maintenance of WSUD Elements Watersteps | Victoria Park The information provided in this section will help Councils understand the monitoring and maintenance requirements of WSUD elements and assist in generating and/or assessing maintenance plans such that the associated monitoring and maintenance plan addresses: •• inspection frequency •• maintenance frequency •• data collection/ storage requirements (i.e. during inspections) •• detailed cleanout procedures (main element of the plans) including: –– equipment needs –– maintenance techniques –– occupational health and safety –– public safety –– environmental management considerations –– disposal requirements (of material removed) –– access issues –– stakeholder notification requirements –– data collection requirements (if any) •• design details The performance of WSUD elements is dependent on the maintenance considerations incorporated during their design. Maintenance personnel need to be involved during the design to ensure their requirements (for example, access) are addressed, they understand the functionality of the systems and the role of maintenance in ensuring design performance criteria are met, and to ensure appropriate maintenance budget is allocated. 18 Book 4 | MAINTENANCE
Water Sensitive Urban Design Watersteps | Victoria Park Routine monitoring checks the status of key functional elements to ensure they meet specified design requirements and include ensuring that inlet and outlet structures are free of debris, and that well distributed vegetative cover of the system is maintained. Unlike traditional engineered structures, WSUD elements will only require minimal routine maintenance and these are generally of a landscape maintenance nature. For example, regular weeding should only be required during the establishment phase of a well designed and constructed system with appropriate planting density limiting the ‘free’ area available for weed growth. Removal of debris and siltation is the most common activity. Maintenance activities should primarily be prompted through predictive and routine monitoring. Predictive monitoring activities occur following significant storm events and are directed at assessing the performance of the system (for example, flow distribution and ponding duration). These activities help identify potential deviations in performance and initiate corrective maintenance actions. Routine monitoring checks the status of key functional elements to ensure they meet specified design requirements and include ensuring that inlet and outlet structures are free of debris, and that well distributed vegetative cover of the system is maintained. It is recommended that vegetated WSUD elements are monitored by personnel with bush regeneration qualifications (as approved by Australian Association of Bush Regenerators). Bush regenerators are well equipped at identifying evasive species within a native landscape typical of vegetated WSUD systems. Furthermore, personnel in charge of monitoring should have a good idea and understanding of the layout and functional design of the treatment system. The maintenance activities prompted through monitoring activities will generally require coordination between landscape and civil services. The following section documents the monitoring and maintenance requirements for bioretention basins, constructed wetlands and sedimentation basins/ponds. The information given can be used to guide development of site specific maintenance plans for WSUD developments. The plans will be used by maintenance personnel and asset managers to ensure the bioretention system functions as designed for its entire life cycle. Book 4 | MAINTENANCE 19
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Level 2, 330 Church Street Parramat
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Landcom Book 4 Maintenance - WSUD

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