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Grandview greenway : an investigation of ecological enhancement & stormwater management as a means of… Stewart, Greg 1998

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GRAND VIEW G R E E N W A Y An Investigation of Ecological Enhancement & Stormwater Management as a Means of Connection in an Urban Environment by G R E G STEWART B.Sc, University of Calgary, 1994 A THESIS SUBMITTED IN PARTIAL F U L F I L L M E N T OF T H E REQUIREMENTS FOR T H E D E G R E E OF M A S T E R OF L A N D S C A P E A R C H I T E C T U R E in LANDSCAPE ARCHITECTURE PROGRAM T H E F A C U L T Y OF A G R I C U L T U R A L SCIENCES We accept this thesis as conforming to the required standard  T H E UNIVERSITY OF BRITISH C O L U M B I A April 1998 © Gregory Paul Stewart, 1998  In  presenting this  degree at the  thesis  in  partial  fulfilment  of  the  requirements  University  of  British  Columbia,  I agree that the Library shall make it  freely available for reference and study. I further agree that copying  of  department  this thesis for scholarly or  by  his  or  her  purposes may be  representatives.  It  is  for  an  permission for extensive  granted by the understood  head of my  that  publication of this thesis for financial gain shall not be allowed without permission.  Department of  l ^ v i p ^ d A P c : ApfcrliT&^TuAggL  The University of British Columbia Vancouver, Canada  DE-6 (2/88)  advanced  copying  or  my written  TABLE OF CONTENTS Abstract  11  List of Drawings  iv  Analysis Aerial photo Route Options and Focus Areas Topography & Hydrology Watershed Boundaries Utilities & Watershed Boundaries Post Development Openspace Circulation Structures & Zoning Site Analysis (Pre 1950's) Site Analysis (Present Day)  LI L2 L3 L4 L5 L6 L7 L8 L9 L10  Trout Lake Watershed Runoff Calculations  Lll L12  Trout Lake  Trout Lake to Grandview Cut Ravine Option Trout Lake Ravine Elevations Trout Lake Ravine Bridge Detail Lakewood Drive Option Lakewood Drive Elevations  L13 L14L15 L16 L17  Grandview Cut Grandview Cut Plan & Elevations Grandview Cut Plan & Elevations  L18 L19  Route Option 1 Route Option 2 Route Option 3 False Creek Flats Urban Canal  L20 L21 L22 L23  Park Layout Plan China Creek Park Elevations  L24 L25  Gandview Canal & Estuary Grandview Canal Sections  L26 L27  False Creek Flats  China Creek Park  False Creek  ABSTRACT  Greenways are linear open spaces, sometimes called "Green Links" which connect parks, Nature preserves, cultural features, historic sites, neighbourhoods, schools and shopping areas. They are often located along either natural corridors like ocean fronts, rivers, stream valleys, ridgelines, or built landscapes such as rail rights-of-way converted to recreational use, canals, trails, scenic roads, lanes or dedicated or shared streets. In the city of Vancouver there is a great opportunity to establish a link between Trout Lake, located in East Vancouver, and False Creek, located in the heart of Vancouver. The mission for this thesis project is to design a greenway connecting Trout Lake to False Creek with special focus on ecological enhancement and stormwater management.  The Route itself has already received citywide support in City Plan approved in 1995. The Greenway, as indicated in the report, will connect Trout Lake to False Creek via the Grandview Cut. With city policy supporting the greenway, the bulk of the thesis is incorporating ecological enhancement and stormwater management into the design. Stormwater from the Trout Lake watershed will be brought to the surface, cleaned through biofiltration by wetlands, and used to sustain a stream, which flows year round to False Creek. By design the stream will be able to support a number of fish habitat, such as Coastal Cutthroat, Coho Salmon, and the endangered Salish Sucker, to name a few. As the Greenway reaches False Creek Flats there is an opportunity to daylight (bring to the surface) two of Vancouver's historic lost streams: China Creek, and Brewery Creek.  ti  The study begins with a series of large-scale context analyses, looking at how the proposed Grandview Greenway fits into the city of Vancouver as a whole. The analyses include topography, hydrology, watershed boundaries, utilities, openspace, circulation, structures, zoning, and how cultural views and perceptions of the environment have changed over the past 50 years.  Trout lake watershed in its built form is the next area of focus. Starting at the individual lot, an analysis of the current condition is identified as it relates to stormwater management. Suggestions are made to increase the amount of groundwater infiltration, while reducing the amount of surface runoff collected in the watershed. Runoff calculations for the watershed illustrate the limits to the proposed system ie. the maximum size of wetland needed to store and treat all stormwater runoff before it enters Trout Lake, and the minimum flow the creek will require during summer dry periods. All calculations support the feasibility of the proposed greenway in its entirety.  Route options are explored to connect the stream to the Grandview Cut, followed by the detailed design of the Grandview Cut to accommodate the stream, pedestrians, cyclists, the existing rail line, and wildlife.  Once in the False Creek Flats, route options are once  again explored to link the stream to False Creek. Now in the industrial section of the greenway route, the form of the stream changes from a model of a natural system to that of an urban canal. This allows the system to accommodate more water, while using less total land area.  Ill  China Creek Park is the next detailed design focus. The goal is to daylight China Creek through the park and connect it to the Grandview Greenway system. It is proposed that for this section of the greenway, the initiative be entirely derived through community groups as well as special interest groups, rather than by the City of Vancouver. What is proposed is at a smaller scale with less intervention to the Landscape.  The final stage of the proposed greenway is the estuary as it enters False Creek near Science World. Detailed design shows how the canal enters False Creek and how it relates to Science World, the Sea Wall, and to the proposed Sustainable Community of Southeast False Creek.  

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