| Summary: | It is estimated that 3.3 million people will inhabit the Vancouver Region within the next 25 years.
Traditionally, constructing low-density suburbs well into the Fraser Valley was the method to
accommodate this regional growth. However, the detrimental impacts of urban sprawl are now well
documented and are having an impact on how Vancouver envisions the growth boundary. Traffic
congestion, auto dependency, and long commutes from isolated suburbs are the noticeable effects of
sprawl for many people living in the Lower Mainland yet another important impact is the threatened local
and regional ecosystems. Urban sprawl is consuming arable land and endangering the natural
ecosystems.
In response to these social and ecological problems, the Greater Vancouver Regional District has
developed the Livable Region Strategic Plan which intends to manage growth through the promotion of
more compact communities, to increase transportation choice, and to protect the green zone within the
GVRD's twenty municipalities. Instead of building upon unused and undeveloped land outside the
metropolitan areas, the plan looks for opportunities within existing communities. The goal is to alleviate
sprawl on a regional scale and maintain the ecological integrity of the hinterlands. However, how can the
intensification within the growth concentration areas be managed to maintain the integrity of our urban
ecosystems?
The Beecher Creek subbasin is a typical example of a highly urbanized watershed within the Bumaby
growth,concentration area. The upper two-thirds of the watershed is mainly single family residential. This
area has the potential to accommodate the current high demand for ground oriented, low cost housing in
the region. However, measures must be taken to mitigate the impacts that increased density will have on
the watershed and the community.
This thesis examines a sustainable growth strategy for the region using a watershed approach and is
based on sensitive infill practices, Best Management Practices (BMP's) and sustainable design. The
result is the Beecher Creek Urban Watershed Retrofit Plan. The watershed components such as the
block, dwelling unit, yard, lane, street, cul de sac, driveway, sidewalk, open space and stream corridors
are examined and retro-fitted to accommodate density while improving the ecological, social and
experiential functioning of the whole. Retrofitting is the term used to describe "the process where
communities incrementally add or alter the built environment to accommodate the needs that are shaped
by changing social and economic realities" (Lee 1999, 12). Each component speaks to a denser, greener
more livable watershed.
The result is a comprehensive design of a retro-fitted Neighbourhood that has accommodated density
while also improving the ecological, social and experiential function of the site. The design addresses the
relationship of the site to its watershed context and its surrounding community. As a comprehensive
document it also serves as a model for similar urban residential watersheds. === Applied Science, Faculty of === Architecture and Landscape Architecture (SALA), School of === Graduate
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