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Runoff Control at Four Scales

LAND DEVELOPMENT AND WATERSHED PROTECTION CAN BE COMPATIBLE: “1997, a presentation on the science of land use change by Kim Stephens and Bill Derry helped an inter-ministry working group realize that we needed more than a setback to protect aquatic habitat. The science shows that communities also need to tackle what is happening on the land that drains to streams,” stated Peter Law, Chair of the former Guidebook Steering Committee, on the 20th anniversary of Guidebook publication (June 2022)


“I found the opportunity to ‘look beyond the stream’ and address poor water quality from drainage runoff in the Waste Management Act. The opportunity resided in the non-point source provision for Liquid Waste Management Plans. The term non-point source pollution was used by my colleagues in the Waste Management Branch to highlight poor quality of runoff from developed and/or developing lands. But this provision was not being applied to the issue of how land is developed. So, I asked my colleagues, why not use this mechanism to connect the dots between changes to the land and impacts on streams,” stated Peter Law.

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THE FIRST DECADE OF PHILADELPHIA’S GREEN CITY, CLEAN WATERS PROGRAM: “Communities across the country are watching, trying to learn how to do this. When you try to change the character of a neighborhood, it’s very difficult,” stated Nancy Stoner, President of Potomac Riverkeeper Network


Philadelphia’s program involves creating ‘greened acres’ — expanses of impervious land that are transformed either to absorb the first 1½ inches of rainfall or send it into rain gardens or other local green infrastructure systems. The City has created more than 1,500 of a projected 10,000 greened acres. From planning through construction and ongoing maintenance, the installations have required coordination among city agencies and with schools, businesses, nonprofit entities, politicians, residents, developers and landowners.

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WORK AT MULTIPLE SCALES TO IMPROVE CONDITIONS IN CREEKSHEDS: “To protect watershed health, understand the watershed as a Whole System, and mimic the natural water balance,” stated Dr. Richard Horner, University of Washington (Seattle)


In the mid-1990s, the pioneer work of Dr. Richard Horner and Dr. Chris May resulted in a hydrology-based framework for protecting watershed health. The framework provided a starting point for applying science-based understanding to reinvent drainage engineering practice. “So many studies manipulate a single variable out of context with the whole and its many additional variables,” stated Dr. Richard Horner. “We, on the other hand, investigated whole systems in place, tying together measures of the landscape, stream habitat, and aquatic life.”

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The Economist explains: Why are Chinese cities flooding?


“Flooding has become a deadly problem in China, especially in major cities. As this Economist article notes, the country’s urban land has more than doubled in the last 20 years, and cities sometimes expand right into the floodplains,” wrote Janice Kaspersen. “Sponge cities are an approach to what we commonly call green infrastructure—an attempt to reduce flooding and infiltrate stormwater runoff in some of the areas most affected by rapid urbanization.”

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FLASHBACK TO 2006: “The urban environments that we can build using LID will be healthier, more sustainable and use less natural resources then the ones we grew up in,” stated Bert van Duin at the Cochrane Innovations in Urban Development Conference


“LID is a practical and cost-effective approach to reducing and/or better managing the impacts of urbanization on our landscape in order to leave a better place for our children and grandchildren,” stated Bert van Duin. This is an exciting turning point in how we can reduce the impacts of urban development on watersheds.”

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FLASHBACK TO 2007: Township of Langley Showcased Green Infrastructure Innovation in Three New Neighbourhoods


The goal in showcasing innovation and celebrating successes was to promote networking, build regional capacity, and move ‘from awareness to action’ – through sharing of green infrastructure approaches, tools, experiences and lessons learned. “After many years of what you would call research, we are now in the developmental phase,” stated Ramin Seifi in 2007 at the Langley event. “We will be monitoring and measuring what matters. This will enable residents and Council to maintain their focus over time.”

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Leading Change in Seattle: How Green Stormwater Infrastructure Can Help Urban Neighborhoods Thrive


City as Platform is more than a tour, and more than just a conference session—it is a hands-on, collaborative learning experience in the field. First debuted at CNU 24 in Detroit, it made an encore appearance at CNU 25 in Seattle and featured the Belltown neighbourhood. It is an ideal laboratory, said Isabelle Giasson, for expanding GSI (Green Stormwater Infrastructure) to meet multiple community outcomes.

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Bigger Pipes or Greener Communities: “Projected changes in land use and climate have nearly equivalent effects on flooding,” says Chris Jensen


“The effects that climate change may have on flood hazard is a concern for many local governments and citizens in British Columbia. Planning for future changes in precipitation is important, but it should not overshadow the significance that day-to-day development has on stream flows,” stated Chris Jensen. “Local governments may not be able to change future storm events, but they can affect how land is developed and redeveloped.”

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FLASHBACK TO 2004: “Judge progress by the distance traveled, not the distance remaining,” stated Kim Stephens at Consultation Workshop that was the launch event for the BC Green Infrastructure Partnership


“We have come a long way in just four years. Our experience in bringing the vision to fruition for the UniverCity Sustainable Community on Burnaby Mountain provides relevant context. It was not that long ago that the project was hanging by a thread. We have been successful in overcoming fear and doubt,” stated Kim Stephens. “In 2000, translating high expectations for UniverCity into practical design guidelines meant revisiting accepted drainage engineering practice.”

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FLASHBACK TO 2011: Capital Region’s ‘Bowker Creek Blueprint’ demonstrates that major breakthroughs happen when champions in local government and in the community share a vision and align their efforts


”People eagerly embrace the opportunities for engagement and education. They really want to share their thoughts and experiences. Residents have a stake in restoring watershed health. There is so much experience that we can mine. We who live in the watershed are the experts,” stated Soren Henrich. He helped build buy-in. He is a professional graphic artist. Among his many
contributions is the Bowker Creek Initiative logo.

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