dynamic shore of volkerak
Anna Sobiech landscape architecture
dynamic shore of volkerak VO L K E R A K ACC E S I B LE
F O R
P E D E S T R I A N
con ce pt
The Volkerak is the third largest fresh water body in the Netherlands, after the IJsselmeer and the Markermeer. It is located in the province of Zeeland. It was originally an open transition area between river and sea. After the completion of the ‘Delta works’, in 1969, it was transformed into a freshwater lake with a more or less constant water level. Because of the extensive blooms of toxic cyanobacteria in summer, which form a danger to human and environmental health, the tourism and recreation develops really slow, despite its high land-, en visual qualities.
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accessibility
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vertical and horizontal water circulation caused by high and low tide allows the sedimentation proccess to happen. It is expected to start around the basalt walls. As a result within the time the new islands will appear
poor quality of water
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fresh watter
first step: closing and improving the existing basalt walls in order to get impermeable barrier. that would allow to keep the devision between water types
brakisch water salt water poor access to the water (Dintelse Gorzen)
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private properties - areas are fenced - access to the lake is forbidden
project ‘Delta works’: dam system with different water types
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landforms
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second step: opening the Philipsdam
existing flora and fauna
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water types devision: brakish water fresh water low tide following the closure of the Phillipsdam in 1987 the area was sweet and it attacked the mudflats and buntings on the banks of the Volkerak permanently dry. The bulk of this “new land” came as a nature reserve and gave a place for reach flora and fauna
shore defences:basalt walls along the shore and dikes - installed in the non-tidal lake, to protect the shore, shallow water areas and uncovered sandbanks and salt marshes from crumbling away
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t i d es
n e xt
t o
t he
Philipsdam
high tide
an d Volker ak sdam western marshharrier
currently at the Volkerak there is a minimal water movement , about 2-3 cm. By opening the Philipsdam there could be a connection with the Notrth Sea. The statistics say that it will influence vertical water movement about 25 % regarding to the tides at the sea shore (f.ex. in Vlissingen). A new tidial lake would not olny have a new water dynamics but as well new sediment transport (morphodynamics). Consequently, high sandbanks, mud flats and salt marshes could happen as a new ecosystems with new flora and fauna
tw o
e nv i r o m ents
w i th
typ i c a l
r ep res e n tati v e
little tern
㻾㼍㼗㻌㼚㼛㼛㼞㼐 㻷㼞㼍㼙㼙㼑㼞㼟㼘㼡㼕㼦㼑㼚㻌㼣㼑㼟㼠
㻾㼍㼗㻌㼚㼛㼛㼞㼐
㼂㼛㼘㼗㼑㼞㼍㼗㻌㻳㼍㼘㼍㼠㼔㼑㼍
㻷㼞㼍㼙㼙㼑㼞㼟㼘㼡㼕㼦㼑㼚㻌㼣㼑㼟㼠
㼂㼛㼘㼗㼑㼞㼍㼗㻌㻳㼍㼘㼍㼠㼔㼑㼍
㻞㻜㻜 㻝㻡㻜 㻝㻜㻜 㻞㻜㻜
㻡㻜
㻝㻡㻜 㻝㻜㻜
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㻡㻜
㻙㻝㻜㻜 㻙㻝㻡㻜
㻜 㻙㻡㻜
㼏㼙㻌㻺㻭㻼
㻙㻞㻜㻜
great spotted woodpecker
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㻞㻜㻜 㻝㻡㻜 㻝㻜㻜
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㼏㼙㻌㻺㻭㻼
european stonechat sea lavender
sandwich_ tern
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㻞㻜㻜 㻝㻡㻜 㻝㻜㻜
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㼏㼙㻌㻺㻭㻼
㻙㻞㻜㻜
㻙㻝㻜㻜 㻙㻝㻡㻜
㻢㻦㻜㻜
㻡㻦㻜㻜
㻠㻦㻜㻜
㻟㻦㻜㻜
㻞㻦㻜㻜
㻝㻦㻜㻜
㻞㻠㻦㻜㻜
㻞㻟㻦㻜㻜
㻞㻞㻦㻜㻜
㻞㻝㻦㻜㻜
salicornia saltmarsh cordgrass
little egret highland cow
DYNAMIC SHORE OF VOLKERAK. ANNA SOBIECH Academy of Architecture Amsterdam
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㻝㻥㻦㻜㻜
㻝㻤㻦㻜㻜
㻝㻣㻦㻜㻜
㻝㻢㻦㻜㻜
㻝㻡㻦㻜㻜
㻝㻠㻦㻜㻜
㻝㻟㻦㻜㻜
㻝㻞㻦㻜㻜
㻝㻝㻦㻜㻜
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eurasian spoonbill
fresh water - mud flates
oysters
brakish water - saline marshes
oyster catcher
s pe ci e s
m as ter
p l a n
A
A’
1: 250000
l e d en d
dam
dike
basalt wall
brakish water (depth 6-24m)
DYNAMIC SHORE OF VOLKERAK. ANNA SOBIECH Academy of Architecture Amsterdam
brakish water (depth 2-6m)
brakish water (depth 1-2m)
fresh water
new island (sedimentation process)
salt marshes
slikken mud flates
beach
ferry terminal
marina
bungalow development
watching tower with climbing wall
prog r a m m e sc h e m e
detaile d
plan
the landscape changes create a new layout for accomodation of the new programme. The proposed activities are located near to the water edge and they are attached to the proposed walking trails
r ou te s
a n d
t i m i ng
sc heme
expanded shore of Volkerak - maximum space to explore while the low tide
im p re s s i o n _ h i gh
im p re s s i o n _ l o w
high tide walk low tide walk walk through natural reservats resting points with accomodation
ti de
ti de
DYNAMIC SHORE OF VOLKERAK. ANNA SOBIECH Academy of Architecture Amsterdam
le gend
dike
basalt wall
brakish water brakish water brakish water (depth 6-24m) (depth 2-6m) (depth 1-2m)
fresh water
new island salt (sedimentationmarshes process)
slikken mud flates
beach
ferry terminal
marina
bungalow development
watching tower with climbing wall