“GreenInfra4Beira”

L o c a t i o n M o z a m b i q u e – B e i r a

P r o j e c t a r e a i n B e i r a : 1 . 7 9 4 h e c t a r e s

Chota

Estoril

Maraza

B e i r a C o m p r e h e n s i v e M a s t e r p l a n 2 0 3 0

C h o t a - M a r a z a : c h a l l e n g e s o f c l i m a t e c h a n g e

A n n u a l f l o o d i n g

2. Improving

Chota water

system

3. Maraza basin

4. Estoril

Lagoon

5. New Rio Maria outlet

C h o t a - M a r a z a : w a t e r m a n a g e m e n t s t r a t e g y

1. Rehabilitation

Rio Chiveve +

new outlet

New outlet canal

Existing Palmeiras outlet

T h e b e n e f i t s o f G r e e n I n f r a s t r u c t u r e

Without GreenInfra With GreenInfra ‘Types’ of GreenInfra: trees, wetlands, ponds

1. SLOW

2. STORE AND RE-USE

3. DRAIN ONLY WHEN NECESSARY

Mar aza -Chota -Lagoa de Be i r a : concept de s i gn

Mar aza

Chota

La goa de Be i r a

• Retention basin with infiltration

• Large retention basins

• Small retention basins

• “Bioswales” / “wadi’s”

• Increased infiltration capacity

• Soil cover by bushes, trees

• Connection / water flow

interconnections

• Compartments

• Wider drainage channels

• Elevated Houses

• Green Roads

• Flood-protected houses

• Urban Wetlands / aquatic plants

• Small channels

T e r t i a r y m e a s u r e s ( p r o p o s e d d u r i n g w o r k s h o p )

D e s i g n o f t h e P r i m a r y a n d S e c o n d a r y m e a s u r e s

D e s i g n o f t h e P r i m a r y a n d S e c o n d a r y m e a s u r e s

Runoff [Cl = 200 mg/l]

Runoff [Cl = 200 mg/l]

Tidal boundary [Cl = 20.000 mg/l]

Hydrologic requirements:

Retention basins Maraza / Chota and new Rio Maria Outlet

L a g o o n - M o d e l s e t - u p

C h o t a - L a g o a d e B e i r a : c o n c e p t d e s i g n

Boulevard New urban environment Mangroves and wetlands Beach restaurants Resort

Goose Point Marsh, Lake

Pontchartrain, Louisiana

C h o t a - L a g o a d e B e i r a : c o n c e p t d e s i g n

MANGROVE PADDLE BOAT TOUR, INDONESIA

L e s s o n s L e a r n e d

Integrated approach

Research by Design

Building with the landscape

Design an efficient, but also beautiful urban environment

Design by Green infrastructure (waterways, parks, ponds, micro drainage)

Make a Business Case: Finance, Institutional Capacity, Cooperation,

Building, Maintenance

Cost reduction up to 40%

Local measures, knowledge and participation

22

Ecosysteemdiensten

23

Waar loop je tegen aan?

• Vraagt uitgebreide toelichting (1 van de 4

missies)

• Vragen aan bewoners: te complex

• Neiging terugvallen tot traditionele

oplossingen

• Traditioneel++ of denken vanuit

Ecosysteemdiensten

Critério para o nível de protecção

das inundações Retenção: 1200 m3/ha (T = 10 ano)

Capacidade de drenagem: 10 l/s/ha

25

Succes?

• Ja, zonder ESD waarschijnlijk niet gestart

• Ja, plan wordt breed gedragen

• Ja, business case lijkt positief (maar niet

alle info is hard)

• Misschien, nog geen stap naar ontwerp,

laat staan realisatie

Result: Safe, Prosperous and Beautiful Beira

M a r a z a : S t r e e t D e s i g n M a n u a l