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Intelligent Sizing of Detention Basins Using a Dynamic Hydraulic Model

Stormwater detention basins are an important part of Water Sensitive Urban Design (WSUD). When designing such a structure it is critical to size the basin correctly, but the problem of determining the correct size for a detention basin is far from trivial. Fortunately, purpose-built hydraulic modelling computer programs can perform much of the computational ‘heavy lifting’ – allowing engineers to make a better estimate of required detention basin size. This paper investigates the use of one such hydraulic model (CivilStorm by Bentley) in the design of a detention basin (and associated appurtenances) in a hypothetical urban design scenario.

 

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A Legionnaires’ Disease Outbreak, A Water Blaster And Roof-Collected Rainwater Systems

In February 2006, an outbreak Legionnaires’ Disease (LD) was identified in Beachlands, a small, isolated East Auckland suburb. It was investigated using case finding, a case-control study, sampling potential sources of infection, and by molecular typing (using sequence-based typing (SBT) of all Legionella pneumophila serogroup 1 (Lp1) isolates). Four cases were identified.

 

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A Study on the Impact of Rainwater Tanks on Streamflow Runoff

Rainwater tank has become an Australian icon of water conservation. This paper examines the possible reduction in streamflow volume in a catchment due to installation of large number of rainwater tanks. The study uses rainfall and runoff events data from the Bremer River Catchment in southeast Queensland in Australia. This assumes hypothetical urban development on the catchment covering 20%, 40%, 60%, 80% and 100% of the catchment area and a 10kL rainwater tank is fitted in each household of the developed part of the catchment.

 

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Rainwater harvesting for domestic use

Millions of people throughout the world do not have access to clean water for domestic purposes. In manyparts of the world conventional piped water is either absent, unreliable or too expensive. One of the biggest challenges of the 21stcentury is to overcome the growing water shortage. Rainwater harvesting (RWH) has thus regained its importance as a valuable alternative or supplementary water resource, along with more conventional water supply technologies. Much actual or potential water shortages can be relieved if rainwater harvesting is practised more widely.

 

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Application of Laboratory ExperimentResults into Practice: Clogging of Stormwater Infiltration Systems

Infiltration systems, which are a popular method to managestormwater, have a history of failure due to clogging within a relatively short period. As yet there is not a single method available to predict the clogging, despite the substantial amount of investments is being made in implementing these systems. Therefore, a detailed laboratory study of stormwater infiltration systems was carried out with the aim of gaining a fundamental understanding of the clogging process.

 

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Community Understanding of the Use of Alternative Water Sources for Irrigation of Golf Courses: Ku-ring-gai Council Case Study

As Australian cities have grown, the demand for potable water has gone close to matching, and in more recent times has exceeded, the sustainable supply. Whilst many water authorities procrastinate on constructing new supply schemes, others are increasingly turning to demand management and alternative supply options to achieve a more sustainable balance. New initiatives rely on customer acceptance, understanding and appreciation of the limited supply of potable water and the proposed alternatives. .

 

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Cooperate or coerce? Intergovernmental approaches to mainstreaming Water Sensitive Urban Design

Water Sensitive Urban Design (WSUD) is still largely in its infancy, and many governments, organisations, and communities are still reinforcing the traditional urban water management approach of highly engineered, mutually exclusive water supply, wastewater, and drainage systems. Many agree that institutionalising WSUD to establish widespread practice can only be achieved through a cooperative partnership approach that includes state and local governments. However,there is no consolidated assessment of the necessary ingredients and key factors that produce successful intergovernmental arrangements for WSUD.

 

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Developing Sustainable Water Management Policy For Kogarah

Kogarah Council’s previous Stormwater code was developed in 1998 to impose controls on new developments. The code mainly focused on drainage issues providing solutions primarily On-Site Detention for flood control. Given the Council’s leading role in promoting Total Water Cycle Management in Sydney region, it was time to increase the scope of the Code to incorporate wider water cycle management issues. A Water Management Policy has therefore been developed to replace the current Code, which adapts concepts of Water Sensitive Urban Design, and reflects the outcomes of Kogarah’s floodplain, estuary and water cycle management programs.

 

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Development Of Alternative Water Resources In The USA: Progress With Rainwater Harvesting

Rainwater cisterns were used in Texas in the early 1900s, but became obsolete as municipal water distribution systems were being developed. Since the early 1990s however, due to population increase and a higher demand for water supplies, there has been a renewed interest inrainwater harvesting in Texas by private individuals, corporations, water utilities, cities, counties and the state government. The Texas legislature has supported and encouraged the use of rainwater harvesting in the state.

 

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Developing Sustainable Water Management Policy For Kogarah

Kogarah Council’s previous Stormwater code was developed in 1998 to impose controls on new developments. The code mainly focused on drainage issues providing solutions primarily On-Site Detention for flood control. Given the Council’s leading role in promoting Total Water Cycle Management in Sydney region, it was time to increase the scope of the Code to incorporate wider water cycle management issues. A Water Management Policy has therefore been developed to replace the current Code, which adapts concepts of Water Sensitive Urban Design, and reflects the outcomes of Kogarah’s floodplain, estuary and water cycle management programs.

 

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