resilience in Dar es Salaam and Addis Ababa Lise Herslund and Antje Backhaus Institute for Geosciences and Natural Resource Management University of Copenhagen Session Water for all ID: 501693
Download Presentation The PPT/PDF document "Leap-frogging towards water" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
Leap-frogging towards water resiliencein Dar es Salaam and Addis Ababa
Lise Herslund and Antje BackhausInstitute for Geosciences and Natural Resource ManagementUniversity of CopenhagenSession: Water for allIARU Sustainability Science Congress, Copenhagen 22-24 October 2014Slide2
Dar
es
Salaam
Addis AbabaSlide3
Dar
es
Salaam
Addis Ababa
Source: UN-DESA
Population Division (2012).
World
Urbanization Prospects: The 2011 Revision.
+2.1M
+4.6M
Population growthSlide4
Water deficit
Dar
es
Salaam
Addis Ababa
Source: Early estimate based on various sources.
demand
supply
demand
supplySlide5
Dar
es
Salaam
Addis Ababa
Source: Early estimate based on various sources.
Flooding & erosionSlide6
Option 1: Do nothingSlide7
Option 2: Local coping strategiesSlide8
Option 3: Grey infrastructureSlide9
Option 4: Green infrastructureSlide10
Option 4: Green infrastructureSlide11
Option 4: Green infrastructure
InfiltrationEvaporationRetentionUse‘Landscape based stormwater management’
Less costly
Connection to other functions
Step by step implementation
More adaptable
… than grey infrastructureSlide12
Water Resilient Green Citiesin AfricaSeptember 2013 – August 2017
www.watergreenafrica.dk Slide13
L
M
SSlide14
Hypothesis The cities can leapfrog
Urban water resilience can be improved by establishing a strong green infrastructure that canreduce the impact of floods andprovide day-to-day services to the citizens (such as water supply, food, open space)Slide15
Leap-frogging activities
Mind-set change of champions
Strategies, plans
and
pilot tests
Activities
Identify champions and stakeholders
on city, catchment and local level
Course and envisioning workshop for professionals becoming champions
Curriculum development master course
Involvement of champions in strategy and plan development
Design charrettes in pilot communities
Assessment
of feasibility of blue-green
structure management
Collection of various field data
Develop strategies for using the landscape for water
management
City
and catchment
level
strategies
Pilot
community strategies
1:1
demonstrations
projects
Slide16
Leap-frogging activities
Mind-set change of champions
Strategies, plans
and
pilot tests
Activities
Identify champions and stakeholders
on city, catchment and local level
Course and envisioning workshop for professionals becoming champions
Curriculum development master course
Involvement of champions in strategy and plan development
Design charrettes in pilot communities
Desktop based assessment of feasibility of blue-green
structure management
Collection of various field data
Develop strategies for using the landscape for water
management
City
and catchment
level
strategies
Pilot
community strategies
1:1
demonstrations
projects
Slide17Slide18Slide19Slide20
Water balance estimates
Addis Ababa
Dar
es
SalaamSlide21
Water balance estimatesSlide22
Water balance estimates
53%
of annual
runoff
81%
of future
demandSlide23
Leap-frogging activities
Mind-set change of champions
Strategies, plans
and
pilot tests
Activities
Identify
and involve stakeholders on city, catchment and local level
Course
and envisioning workshop
for professionals - becoming champions
Master course curriculum development
Involvement of champions in strategy and plan development
Design charrettes in pilot communities
Desktop based assessment of feasibility of blue-green
structure management
Collection of various field data
Develop strategies for using the landscape for water
management
City
and catchment
level
strategies
Pilot
community strategies
1:1
demonstrations
projects
Slide24
Stakeholder workshops to dateCity structure plan team and
local government officers in Addis Ababa Engineers and planners in Dar es SalaamPilot river catchment stakeholders in Addis Ababa
Strongly agree
Agree
Neutral
Disagree
Strongly disagree
Flooding is a serious problem in the area
26
5
0
0
0
Drought is a serious problem in the area
17
12
0
2
0
At present, flooding is adequately coped with in the area
0
1
0
19
8
Landscape based
water
management will effectively help mitigating flood problems
19
3
3
4
0
There is much certainty about the capacity of landscape based
water
mgt
as
a means to mitigate floods
10
15
4
2
0Slide25
What champions?
Water and Sewerage utilitiesFarmers cooperations
Water or Environmental
c
ommitees
Different
woredas
Urban Planners
Solid Waste
Managers
Green Space
Managers
Funeral
savings
groups
Ministeries
Env. protection agencies
Condominium
development committees
Basin Authority
Housing DeptSlide26
Leap-frogging activities
Mind-set change of champions
Strategies, plans
and
pilot tests
Activities
Identify champions and stakeholders
on city, catchment and local level
Course
and envisioning workshop
for professionals
Curriculum development master course
Involvement of champions in strategy and plan development
Design charrettes in pilot communities
Desktop based assessment of feasibility of blue-green
structure management
Collection of various field data
Develop strategies for using the landscape for water
management
City
and catchment
level
strategies
Pilot
community strategies
1:1
demonstrations
projects
Slide27
The everyday life perspective
Down-
stream
Flooding, siltation and pollution
Living
with
flooding
–
how
?
Up-
stream
Water supply shortage
Erosion and
stormwater
flushes
Wastewater and solid waste – disposed in environment
Poor construction -
i
ncreased
water demand for toilet
flushingHolding on to more water – how?
Opportunities
Retention of
water
and
rainwater
harvesting
Waste
management and alternative sanitation
Collective
solutions – how?Slide28
Leap-frogging activities
Mind-set change of champions
Strategies, plans
and
pilot tests
Activities
Identify champions and stakeholders
on city, catchment and local level
Course
and envisioning workshop
for professionals
Curriculum development master course
Involvement of champions in strategy and plan development
Design charrettes in pilot communities
Desktop based assessment of feasibility of blue-green
structure management
Collection of various field data
Develop strategies for using the landscape for water
management
City
and catchment
level
strategies
Pilot
community strategies
1:1
demonstrations
projects
Slide29Slide30
Catalogue of (early) ideasSlide31
First resultsChallengesencroachment of green areas – multi-functional use?pollution
lack of collective and coordinated practices to prevent floods and droughtmind-set change in city departmentsfragmented institutional set up Opportunitieswater supply potential – rain water harvestinglocal projects with multiple benefitsawareness of the problems with floods and drought at both city and local leveltop down and bottom up approaches
powerful championsSlide32
So how to leapfrog?The water balance – there is water!
Local collective projects with multiple benefits- Addressing both flooding and water supply but also waste managementMind-set change in city departments- Why increase expensive centralized systems if large amounts are lost in the distribution system?