Landscapes - Spring 2018 - 46

SIGNPOST
MAKING
ROOM FOR THE RIVER
REQUIRED ELEVATION TO REACH 1:200 FLOOD
0.3CM (MIN)

3.3M (MAX)

EXISTING GROUND ELEVATION

RAISED TOPOGRAPHY WITH STEPPED
STONE TERRACE

FLOOD PROTECTION BENCH

PLANTERS

5

O2 and S2S sculpted polishing marshes
and wet meadows, their forms inspired
by anabranches or river scrolls. The
scrolling forms in the landscape enhance
filtration, create diverse habitats, and
provide more depth to store water when
necessary. The network of pathways
and boardwalks mimic and contrast
these forms: visitors can read the river's
story over time. The final outflow stream
discharges to an important trout habitat
area, designed to serve as a refuge
during river flood conditions.
WEST
EAU CLAIRE PARK:
EXISTING FLOOD CONDITION
TIGHT
CONSTRAINTS
WATER EDGE
200-YEAR R FLOOD ELEVATION ABOVE EXISTING
At the
north
end of the city, however,
100-YEAR FLOOD ELEVATION ABOVE EXISTING
FLOOD PROTECTION BARRIER
floodPROPOSED
mitigation
was an altogether
different problem. Here, along the Bow,
is West Eau Claire Park, one of the city's
most cherished public spaces. A linear
promenade that traverses the length
of the riverfront park is so popular that
walkers, runners, and cyclists all vie
for space. Across a narrow lagoon sits

Prince's Island Park, popular even in
winter when the lagoon is flooded for
skating. And year-round, people come
to enjoy Santiago Calatrava's landmark
Peace Bridge...so many that the city
needed a new public space at the south
end of the bridge.
Understanding that the park was "overloved", O2 commenced a master-planning
project for a beautiful new space, named
Delta Park, where the patterns of a delta
were used to structure paths that direct
walkers and cyclists from the bridge and
offer places to rest. At this point, the City
concluded their first flood-mitigation
studies after the 2013 flood and West
Eau Claire was proposed as the site for a
barrier to protect downtown.
WATER EDGE

100-YEAR FLOOD EXTENT
200-YEAR FLOOD EXTENT

PROPOSED FLOOD BARRIER

100 m

The City's engineering consultant
provided the basis for the barrier: a
two-metre tall berm that was functional,
1
but very...engineered.
The disruption to
EAST PROMENADE
the space
would have been incredible.

It became our team's task to figure out
how we could accommodate this work
in a way that had a positive effect on
the space.
FLOOD MITIGATION TOOLKIT
We developed a series of approaches.
First, we raised the existing pathway
by as much as we felt we could without
creating an obvious disruption to the
existing terrain. This gave us half a
metre of elevation. Then, we looked
at the context and how much higher
we needed to go and developed two
different strategies.
In areas where we could, we terraced
earthwork, creating social spaces,
viewpoints and an amphitheatre. We
tied this terracing into spaces that
would allow people to interact with the
river - places where we could restore
riparian vegetation to reinforce the
bank. In other areas, we replaced the
berm with a wall to reduce its footprint

5

View looking west on the East Promenade. 200-Year flood protection is achieved through the construction of a flood wall wrapped with a bench.

SECOND LEVEL PROTECTION

RAISED PROMENADE (+0.5 m)

RAISED TOPOGRAPHY (+1.6 m)

RAISED BIKE PATH (+0.3 m)

FLOOD WALL WITH BENCH
(+1.0 m)

STEPPED STONE TERRACE

RAISED PROMENADE (+0.5 m)

RAISED PROMENADE (+0.5 m)

20

0

A
-Y E

RF

1

LO

OD

20

EAST PROMENADE
Flood wall with bench

46 LANDSCAPES PAYSAGES

ELEVATION

+ 3.0m
+ 2.5m

0 -Y

EA

RF

LO

OD
20

0 -Y

EA

RF

LO

OD

20

2

RAISED PROMENADE + BIKE PATH

Elevated pedestrian and bike path by 0.5m above existing path

3

STEPPED TERRACE
Stepped stone barrier

0 -Y

4

EA

RF

LO

OD



Table of Contents for the Digital Edition of Landscapes - Spring 2018

To Begin With
Our Writers
Upfront
Essay
THE TRIAD OF LANDSCAPE ARCHITECTURE
CHANGZHI WETLAND PARK
AFTER THE DESIGNERS LEAVE THE ROOM
YOU CAN ONLY DESIGN A RIVER ONCE
CONVERSATION
A “PUF” OF INSPIRATION: TOWARD NET ZERO NEIGHBOURHOODS
THE TOUGH GET GOING ON THE WAY TO TRANSFORMATION
THE HALIFAX EXPLOSION: A STORY ONLY THE LANDSCAPE CAN TELL
INTERVIEW
CRITIQUE
PARTING SHOT | UNE DERNIÈRE SALVE
Landscapes - Spring 2018 - Intro
Landscapes - Spring 2018 - cover1
Landscapes - Spring 2018 - cover2
Landscapes - Spring 2018 - 3
Landscapes - Spring 2018 - 4
Landscapes - Spring 2018 - 5
Landscapes - Spring 2018 - 6
Landscapes - Spring 2018 - 7
Landscapes - Spring 2018 - To Begin With
Landscapes - Spring 2018 - 9
Landscapes - Spring 2018 - Our Writers
Landscapes - Spring 2018 - 11
Landscapes - Spring 2018 - 12
Landscapes - Spring 2018 - 13
Landscapes - Spring 2018 - Upfront
Landscapes - Spring 2018 - 15
Landscapes - Spring 2018 - 16
Landscapes - Spring 2018 - 17
Landscapes - Spring 2018 - 18
Landscapes - Spring 2018 - 19
Landscapes - Spring 2018 - 20
Landscapes - Spring 2018 - 21
Landscapes - Spring 2018 - 22
Landscapes - Spring 2018 - 23
Landscapes - Spring 2018 - Essay
Landscapes - Spring 2018 - 25
Landscapes - Spring 2018 - 26
Landscapes - Spring 2018 - 27
Landscapes - Spring 2018 - 28
Landscapes - Spring 2018 - THE TRIAD OF LANDSCAPE ARCHITECTURE
Landscapes - Spring 2018 - 30
Landscapes - Spring 2018 - 31
Landscapes - Spring 2018 - 32
Landscapes - Spring 2018 - 33
Landscapes - Spring 2018 - CHANGZHI WETLAND PARK
Landscapes - Spring 2018 - 35
Landscapes - Spring 2018 - 36
Landscapes - Spring 2018 - 37
Landscapes - Spring 2018 - AFTER THE DESIGNERS LEAVE THE ROOM
Landscapes - Spring 2018 - 39
Landscapes - Spring 2018 - 40
Landscapes - Spring 2018 - 41
Landscapes - Spring 2018 - 42
Landscapes - Spring 2018 - YOU CAN ONLY DESIGN A RIVER ONCE
Landscapes - Spring 2018 - 44
Landscapes - Spring 2018 - 45
Landscapes - Spring 2018 - 46
Landscapes - Spring 2018 - 47
Landscapes - Spring 2018 - CONVERSATION
Landscapes - Spring 2018 - 49
Landscapes - Spring 2018 - 50
Landscapes - Spring 2018 - 51
Landscapes - Spring 2018 - 52
Landscapes - Spring 2018 - 53
Landscapes - Spring 2018 - 54
Landscapes - Spring 2018 - 55
Landscapes - Spring 2018 - A “PUF” OF INSPIRATION: TOWARD NET ZERO NEIGHBOURHOODS
Landscapes - Spring 2018 - 57
Landscapes - Spring 2018 - THE TOUGH GET GOING ON THE WAY TO TRANSFORMATION
Landscapes - Spring 2018 - 59
Landscapes - Spring 2018 - 60
Landscapes - Spring 2018 - 61
Landscapes - Spring 2018 - THE HALIFAX EXPLOSION: A STORY ONLY THE LANDSCAPE CAN TELL
Landscapes - Spring 2018 - 63
Landscapes - Spring 2018 - INTERVIEW
Landscapes - Spring 2018 - 65
Landscapes - Spring 2018 - 66
Landscapes - Spring 2018 - 67
Landscapes - Spring 2018 - 68
Landscapes - Spring 2018 - 69
Landscapes - Spring 2018 - CRITIQUE
Landscapes - Spring 2018 - 71
Landscapes - Spring 2018 - 72
Landscapes - Spring 2018 - 73
Landscapes - Spring 2018 - 74
Landscapes - Spring 2018 - 75
Landscapes - Spring 2018 - 76
Landscapes - Spring 2018 - 77
Landscapes - Spring 2018 - 78
Landscapes - Spring 2018 - 79
Landscapes - Spring 2018 - 80
Landscapes - Spring 2018 - 81
Landscapes - Spring 2018 - 82
Landscapes - Spring 2018 - 83
Landscapes - Spring 2018 - 84
Landscapes - Spring 2018 - 85
Landscapes - Spring 2018 - PARTING SHOT | UNE DERNIÈRE SALVE
Landscapes - Spring 2018 - cover3
Landscapes - Spring 2018 - cover4
Landscapes - Spring 2018 - LPplus1
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