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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

17 16 14

15

01

ON

ING TL

RC E OU AT E

CR

YC L

UN

04 03 02

HW ES

T-

T

EB

05

+ C

RE

EN

AN

06

TM

S ES

AS LIV 10 SY IN ST G EM 09 TR 07 08 EA S

ER

FR

11

MO

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

12

S

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


Re:WATER  

Water strategies for the lebanese coast.

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