Stormwater Management Strategy for Armstrong Creek

This study aims to assist Council to set objectives for stormwater management which includes an integrated approach to stormwater management that meets objectives for hydraulic capacity and waterway management.

The study provides an understanding of the extent of flooding and mitigation options in the Armstrong Creek Urban Growth area. It also aims to minimise the disturbance of waterways created by altered flow regimes and to protect natural drainage and aquatic ecosystems. This will assist with minimising the impact of urban development on the water quality in receiving waters, the down steam environment and the RAMSAR wetlands.

The study aims to enhance the value and public amenity of the existing stream corridors, biodiversity and environment of Armstrong Creek as a key asset of the Armstrong Creek Urban Growth area. It includes the principles of water sensitive urban design (WSUD), sustainable urban growth and a full range of urban design, water conservation and local stormwater infrastructure options likely to be proposed by developers.

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Deterioration, Depreciation and Serviceability of Storm Water Pipes

This case study explores strategies and models to evaluate the depreciated value of storm water pipes. The paper presents a valuing approach which hopes to improve current Australian Accounting Standard methods. Storm water networks are extremely expensive to develop and maintain; hence effective assessment of their current condition is essential.

The report suggests the structural condition of pipe networks and the level of service they provide are integral to storm water asset management. The analysis presents a Markov model, calibrated using structural condition databases and Bayesian techniques, to determine structural deterioration of pipes. Diameter, construction material, soil type and exposure are found to influence the deterioration process. The case study shows the level of serviceability to be dependent on the pipes location in the network and defines factors which diminish its hydraulic capacity.

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Innovative Water Cycle Design at Heritage Mews

This study investigates the application of regime in balance storm water management practices at “Heritage Mews”. Traditional urban drainage focuses on making peak flows from a developed site equal to the value estimated for its ‘greenfields’. Following research which suggests this method to be ineffective in reducing flood peaks, the authors investigate the results of executing a regime in balance strategy instead.

A regime in balance strategy emphasizes on an equality of ‘before and after’ runoff volumes. This strategy produces improved control of downstream flooding, conservation of stream ecology, improved amenity and support for linear parks and urban forests. The use of rainwater tanks is proved to be integral as a means to isolate storm water from further flood wave involvement.

The execution of regime in balance design is simple, however the case study demonstrates its complexities and how ingenuity can overcome such problems.

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Design Strategy for the Reuse of Stormwater

This report investigates the outcomes of storm water and roof water collection. The investigation explores source control techniques and assesses their economic and environmental benefits. Design strategies are in the context of Australian standards and policies.

The report demonstrates varying benefits from storm water management which includes reduced environmental impact, significant reduction in demand for mains water and storm water infrastructure. The use of rainwater tanks is significant to these results.

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