re:WATER
water strategies for the Lebanese Coast
In 2050, water will be the most valuable ressource in the Middle East. In Lebanon, the high rates of rainfall are lost by the lack of water harvesting. As of summer 2010, water demand exceeds supply by 3 times*. If not addressed, this gap will turn into conflict. *Source: G. Yamout and M. El-Fadel. An Optimization Approach for Multi-Sectoral Water Supply Management in the Greater Beirut Area (2005)
This project envisions alternatives to
grow clean water on the Lebanese Coast by transforming its 17 coastal rivers into living systems that will treat 100% of the coast’s wastewater and stormwater. Treated water will be reused by the coastal cities, creating closed water loops that sustain the future water demand on the coast.
fact
60%
of Lebanese live on the Coast
0%
of consumed water is reused
only 30% of their water demand is provided*
70%
of their consumption is for non potable usage*.
*Source: G. Yamout and M. El-Fadel
An Optimization Approach for Multi-Sectoral Water Supply Management in the Greater Beirut Area(2005)
oppor 60% of Lebanese tunity live on the Coast wastewater only 30% reuse could of their water provide 50% demand is of water demand* provided
rainwater reuse could provide 20% of water demand*
*Source: G. Yamout and M. El-Fadel
An Optimization Approach for Multi-Sectoral Water Supply Management in the Greater Beirut Area(2005)
water reuse 70% 100% 0% can provide of their of consumed of consumed consumption is 70% of water is water is for non potable water reused usage* reused demand
vision
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by 2050, the Coast will turn into a LIVING SYSTEM that treats and recycles 100 % of its own water through its 17 coastal rivers.
RIV
RS
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13
biking & walking trails
urban parcs
green open space
natural reserves
COASTAL RIVERS AS
aquatic systems dunes
LIVING SYSTEMS
flora & fauna corridors
recreation space organic farms fishing ponds
forests
marshes storage ponds
constructed wetlands
the Coast as Living System The Coast will treat its wastewater and stormwater using micro-organisms, aquaculture, mollusks (snails and oysters) and plants.
RIVER
CITY
treated water will be harvested and reused by the city
Closed Water Loop TREATED WATER IS REUSED
RAIN
HOUSEHOLD
LIVING SYSTEM CLEANS WATER
CITY INDUSTRY
AGRICULTURE
70% of non-potable water consumption
SEA
Living system type 1 : Living Machines* living machines are ecological treatments that use micro-organism, aquatic & wetlands processes to treat wastewater naturally. reused water
to city
wastewater
from city pre-treatment
1
primary treatment
secondary treatment
Tidal Flow Wetlands
Vertical Flow Wetlands
Water Reuse Storage
3
4
5
6
2
contaminated *Source: Ocean Arks International, Living Machines.
clean
Living system type 2 : Wetlands* Wetlands are constructed landscapes that filter and clean stormwater and urban runoff biologically. RAIN
reused water
rainwater stormwater pre-treatment storage tank
1
to city sub-surface flow wetland
2
contaminated *Source: Ocean Arks International, Living Machines.
control box
3
disposal & drainage wetland
4
Water Reuse Tank
5 clean
Anatomy of a coastal river as a living system
urban
suburban
lower basin
sea
source
upper basin
high density agglomeration
low density agglomeration
local living systems for local water reuse
sea
terminal waterfront park
connect to existing parks and pedestrial trails LIVING SYSTEM 1
LIVING SYSTEM 1
pedestrian trails
wetlands
wetlands
pedestrian trails
pedestrian trails
wetlands
wetlands
pedestrian trails
RAIN
RAIN
LIVING SYSTEM 2
LIVING SYSTEM 2 connect to existing parks and pedestrial trails
source
Nahr Beirut as a living system
canal
stormwater living systems
storage ponds
treating wetlands
reuse tanks
stormwater living systems =flood mitigation network storage ponds
decanalize Nahr Beirut LOCAL ROAD LOCAL ROAD
river opens up to city
wastewater living systems
living systems
local living machines
40000m3/day treated wastewater* = Nahr Beirut winterday average flow
treating wetlands
aquaculture
continuous flow in Nahr Beirut all year round *Source: CDR. www.cdr.gov.lb
public space systems
parcs
bridges
platforms
trails
living system as public space
CIVIC PERFORMATIVE