two rivers urban park 10 november 2016
TRANSCRIPT
TWO RIVERS URBAN PARK
10 November 2016
Draft Green Corridor Concept Plan
In partnership with the City of Cape Town
Melanie Attwell
and Associates
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FOCUS AREA
PROCESS
Purpose: conceptualise - a set of principles and proposals for the ‘4th precinct’- the Green Corridor.
Informants: stake holder engagement
specialist studiesstatus quo analysis 2003 TRUP CF review
Methodology: Co-designManifestoMapping Scenarios
Interpretive MappingStatus Quo Analysis
Conceptual proposals
Draft Landscape Plan
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TRU-Park
water
and
biodiversity
energy
and
materials
urban planning,
transport and
economic
opportunity
social
and
cultural
features
sustainable environmental
approach
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restore and preserve
ecological integrity
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metropolitanurban park
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sustainable
modes of
transport
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mixed use,mixed-tenuredevelopment
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develop
funding
opportunities
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alternative
systems of
technology
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social
partnership
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integrative
space,culture
and memory
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clear admin, management
institutional systems
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MANIFESTO
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7 8 9 106
To develop a safe metropolitan urban park based on sustainable principles and responsible management practices.
To restore and preserve the ecological integrity of the site as a special physical and visual amenity.
To embrace a sustainable environmental approach respecting the site natural qualities of the site and Earth’s resources
To promote the use of sustainable modes of transport such as walking, cycling and public transport.
To provide dense mixed-use, mixed tenure urban environment, where appropriate, in a sustainable and holistic manner.
To develop funding and local economic opportunities geared towards sustainable development.
To align the development and the preservation with clear management, administrative and institutional systems.
To develop TRUP as an integrative space that responds to culture, heritage and memory of the site.
To establish an inclusive social partnership that can form the basis of cooperation between the various stakeholders.
To develop, where possible, alternative systems of technology -resource efficient sustainable technologies.
MANIFESTO
3 Possible Scenarios : What…if TRU-Park…
URBAN WETLAND
What if TRU-Park…
is a continuously wide
riverine park reconnecting
the city to the coastline, re-
establishing the lost wetland
estuary.
EXTENDED PARK
What if TRU-Park…
extends into its urban
surroundings, intertwining the
natural and urban
environments.
The naturalised fingers create
a transition zone to reduce
the impact of the
surroundings on the riverine
system, absorbing movement
and water flows.
PRESERVED PARKWhat if TRU-Park…
is recognised and upheld as
the last large green natural
area close to the city.
The continuity of the natural
system is re-established, by
preserving all green open
areas within the park and
particularly the floodplain.
B CA
TRUP within
Salt River
Catchment
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CONTEXTUAL ANALYSES
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SITE ANALYSES
Geology and Topography Elevation Heritage
Storm water system Flood lines Hydrological system
DESIGN INFORMANTSTopographic + Spatial
+ Heritage
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DESIGN
INFORMANTSHydrology
+ Infrastructure
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SITE ANALYSES
Botanical Sensitivity
Critical Biodiversity AreasOpen Space Categories Access of Open Space
Faunal Sensitivity Vegetation Previously present on Site
DESIGN
INFORMANTSBiodiversity
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DESIGN
INFORMANTSFreshwater
Sensitivity
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DESIGN
INFORMANTSBiodiversity
Agreement
Areas 2016
Source: Cape Nature
DESIGN
INFORMANTSOpen Space
+ Accessibility
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DESIGN INFORMANTSTRU-Park Stakeholder Mapping: Constraints and Opportunities
TRU-Park is ..
• protecting the integrity of the ecological systems - green lung.
• enabling and enhancing bio-diversity corridors.
• enabling urban agriculture.
• balancing environmental and recreational uses.
• enhancing the perception and the experience of the landscape.
• cleaning the water of the rivers through a broader water purification strategy.
• enabling the wetlands.
• naturalizing the river courses.
• surveying and protecting fauna and flora.
• enabling recreational use of the rivers.
• protecting and enhancing the heritage landmarks and views.
• identifying spaces for ceremonies and rituals.
• celebrating the different cultural narratives associated with the site.
• a pedestrian and public transport based area [reduced car/no car].
• promoting the use of public transport [NMTand IRT network]
• providing strategic [NMT] pedestrian and cycle links and bridges
• re-introducing the bridge over Black river connecting MGV to Observatory.
• mitigating the impact of infrastructural and natural barriers across the site.
• an open public amenity accessible to all.
• activated by a wide variety of social infrastructure.
• ensuring the continued functioning of existing activities.
• extending to the sea and to Langa.
• including the development of Alexandra Rd as an ‘activity street’.
• including the Maitland Garden Village in the development strategy.
DESIGN
INFORMANTSPublic
Participation
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Manifesto recognises the strategic location of
TRUP its attributes and unique qualities that can
help to “ heal the city”
TRU-Park has the potential to:
BECOME
Ecologically thriving landscape, celebrating its rich
cultural diversity
PROVIDE
Opportunities that re-address the socio-spatial legacy of
apartheid
TRU-Park MANIFESTO
1 Metropolitan Park
2 Ecological integrity
3 Sustainable environmental approach
4 Sustainable modes of transport
5 Mixed-use, mixed tenure urban environment
6 Funding and local economic opportunities
7 Clear management, administrative and institutional systems
8 Integrative space
9 Inclusive social partnership
10 Alternative systems of technology
3 GUIDING DESIGN PRINCIPLES RESULTING FROM INTERPRETATIVE MAPPING:
CONSERVE
CONNECT/ACCESS
ACTIVATE
CONCEPT
Hydrology and
Biodiversity
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CONCEPT
Active and Passive
Open Space
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CONCEPT
Accessibility
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CONCEPT
Edges
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DRAFT
LANDSCAPE
PROPOSAL
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Liesbeek River North of
Station Road
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Proposed development within the
edges of the Sports Fields would require further investigation in
respect of type of development
and Storm Water drainage.
Reconnecting Liesbeek River and the Old Arm and its recreational potential.
MAIN ELEMENTS FOR FURTHER INVESTIGATION:
Liesbeek River South of
Station Road
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Proposed development within the
edges of the Sports Fields would require further investigation in
respect of type of housing and
Storm Water drainage.
Proposed orchard reconsider as wetland or grass land.
MAIN ELEMENTS FOR FURTHER INVESTIGATION:
Black River
Alexandra Hospital Area
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The extension of Station Road over the Black River and the M5 traverses
over a portion of the Raapenberg
Wetland.
First Nation celebratory intervention at the convergence of the Liesbeek
and Black Rivers.
Pathway between the RaapenbergWetland and the Black River.
MAIN ELEMENTS FOR FURTHER INVESTIGATION:
Black River
Maitland Garden Village
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Nodal development and potential
flood alleviation pond below Maitland
Garden Village occurs in the vicinity of a wetland identified by the Fresh
Water Specialist Study as’ Fresh water
Features of medium Sensitivity’.
MAIN ELEMENTS FOR FURTHER INVESTIGATION:
Black River
Oude Molen Area
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Berms as visual screening of the M5.
Flood storage area below Oude Molen.
MAIN ELEMENTS FOR FURTHER INVESTIGATION:
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Green Bridges
Wildlife Bridge (Netherlands)
Urban Green Bridge (London)
High Line (NYC)
Careful consideration, with an accurate
audit of the wildlife within the river corridors will be required before ameliorating and
improving the river edge embankments.
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Types of nature friendly banks, Source: RHDHV, Watercourse Management and Creating a Docking/Waterfront Feature, 2016, p 76.
All proposed interventions, memorial,
educational, spiritual or recreational will require careful consideration in respect of
their positioning, character and
ecological and social implications.
ELEMENTS THAT REQUIRE FURTHER INVESTIGATION:
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WATER QUALITY AS A PRIMARY CONSTRAIN
Impact on Recreation:
• The current City of Cape Town’s
policy is that swimming in fresh
surface waters should be avoided
(Verbal input River Study Workgroup
meeting 2 on 5 May 2016).
• The E.coli limit for contact recreation,
which is about 400 counts/100 ml in
South Africa (DWAF, 1996a) is
regularly transgressed.
• Both Vygekraal and Elsieskraal have
similar high E.coli counts. No clear
seasonal pattern can be recognised.
• Other pollutants which are not being
monitored could also be a problem
(pesticides, heavy metals), but are
not the major part to be addressed
by the options considered.
Quality Impact on Recreation:
• Indirectly, the recreational use is also
influenced by the ecological
functioning of the river.
• The oxygen saturation levels are
fluctuating with lowest levels in the
summer months, often less than 30%.
Oxygen saturation should ideally be
at least 80% for good ecological
functioning (DWAFc, 1996).
• The Athlone WWTW has a positive
influence on eutrophication levels;
upstream of the WWTW water quality
is worse than elsewhere along the
river.
Source: RHDHV, 2016: Water Management and Creating a
Docking/Waterfront Feature
Thank you
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