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Stormwaters, flowing into storm sewers, are known to significantly increase the annual pollutant loads entering urban receiving waters and this results in significant degradation of the receiving water quality. Knowledge of the characteristics of stormwater pollution enables urban planners to incorporate the most appropriate stormwater management strategies to mitigate the effects of stormwater pollution on downstream receiving waters. This requires detailed information on stormwater quality, such as pollutant types, sediment particle size distributions, and how soluble pollutants and heavy metals attach themselves to sediment particles. This study monitored stormwater pollution levels at over 150 locations throughout the Netherlands. The monitoring has been ongoing for nearly 15 years and a total of 7,652 individual events have been monitored to date. This makes the database the largest stormwater quality database in Europe. The study compared the results to those presented in contemporary international stormwater quality research literature. The study found that the pollution levels at many of the Dutch test sites did not meet the requirements of the European Water Framework Directive (WFD) and Dutch Water Quality Standards. Results of the study are presented and recommendations are made on how to improve water quality with the implementation of Sustainable Urban Drainage Systems (SUDS) devices.
The results obtained in this study are encouraging and important for the implementation of permeable pavement and swales in The Netherlands, since the performance of SUDS in delta areas and in areas in the world with comparable hydraulic circumstances has been viewed with skepticism. The research undertaken on Dutch SUDS field installations has demonstrated with new, full scale monitoring methods that most of the bioretention swales and permeable pavements tested in this study meet the required hydraulic performance levels even after years in operation and without maintenance. Standardized tests of sedimentation devices however demonstrated that these facilities have a limited effectiveness for particles smaller than 60 µm while receiving a normal hydraulic loading. The applied methods of full scale testing of SUDS can easily be applied to observe the hydraulic performance of swales and permeable pavement after years of operation. Innovative monitoring methods and visualization of these experiments using video footage allows real-time observation of the entire infiltration process. Recording these observations in a logbook can provide insight in their demand of maintenance and can also help to improve their design.
Internet on the Outstation provides a new take on the digital divide. Why do whole communities choose to go without the internet when the infrastructure for access is in place? Through an in-depth exploration of the digital practices occurring in Aboriginal households in remote central Australia, the authors address both the dynamics of internet adoption and the benefits that flow from its use. The book challenges us to think beyond the standard explanations for the digital divide, arguing that digital exclusion is not just another symptom of social exclusion. At its heart, Internet on the Outstation is a compelling examination of equality and difference in the digital age, asking: Can internet access help resolve the disadvantages associated with remote living?Internet on the Outstation is the result of a multi-year research collaboration, which included a trial of internet infrastructure, training and maintenance in three small Aboriginal communities (known as outstations). During the research phase, Ellie Rennie, Eleanor Hogan and Julian Thomas were based at the Swinburne Institute for Social Research in Melbourne. Robin Gregory and Andrew Crouch worked at the Centre for Appropriate Technology, an Indigenous-owned research and training organization in Alice Springs. Alyson Wright worked for the Central Land Council, the representative body for traditional owners of the central Australia region.
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