“The technical language is in transition. The single function view of traditional 'stormwater management' is giving way to the integrated and comprehensive perspective that is captured by the term 'rainwater management'” states Kim Stephens.
“Modern rainwater management looks at the dynamics of the entire watershed and identifies how development can use 'green infrastructure' to maintain natural systems and protect buildings. It works to restore the function of trees, soil and open space,” says Calvin Sandborn.
This is a policy guide for decision makers looking to implement green strategies and includes nine case studies of cities that have successfully used green techniques to create a healthier urban environment. Included in the guide are nine helpful case studies of cities that have successfully used green techniques to create healthier urban environments.
Richard Boase (120p)
The major work has been done, the salmon have returned to spawn as soon as the new habitat was finished. All we have to do now is finish it off.
“Capturing rainwater where if falls offers appealing technical alternatives to stormwater runoff capture than conventional end-of-pipe measures. Decentralized controls have the potential to reduce the frequency and volume of CSO events. In addition, a decentralized approach to stormwater management allows communities the flexibility to respond to everchanging economic and environmental conditions,” stated Neil Weinsten.
“Bowker Creek is like most urban creeks – it’s in rough shape. Luckily, it also has some advantages. Bowker Creek runs through a densely populated area full of citizens who want more nature, less pollution, and better greenway corridors in their neighbourhoods. They have supported their municipalities – Oak Bay, Saanich and Victoria – to become part of the Bowker Creek Initiative. With re-development comes opportunity for creek restoration or creek day-lighting (opening buried sections),” Tanis Gower wrote.
The street retrofit project includes rain gardens and bioretention ponds that are expected to capture up to 90% of the rainwater runoff.
The process of evolving current design practices for neighbourhoods, roadways, and the minor/major drainage system to manage the total volume – in addition to the peak rate of urban runoff – requires tools for planning and engineered site design.
The EPA is now writing new regulations – expected to be enacted in 2012 – that will define what is expected of developers, possibly by setting limits for stormwater volume or concentrations of contaminants.
Ed von Euw (120p)
Metro Vancouver and Vancouver Island are learning from each other, and are moving in the same direction.
