surface water flood risk management in london alex nickson, policy and programmes manager, climate...
TRANSCRIPT
Surface water flood risk management in London
Alex Nickson, Policy and programmes manager, climate change adaptation and water
Greater London Authority
…..so what is the GLA?• The Greater London Authority (GLA) is the regional government
for London
• Comprises an elected Mayor and an elected London Assembly
• The Mayor – has executive powers over the GLA Group– is required to promote the health, wealth and social equality of
Londoners– is required to publish a range of statutory strategies– has limited planning and development control powers– is the ‘voice’ of London.
• The London Assembly scrutinises the plans and activities of the Mayor and holds him to account.
London as a ‘world city’
Distribution of population growth
Tidal & fluvial flood risk in London
Why Drain London?• Early 2007, we identified surface water
flood risk as a potential threat
• no ownership of risk
• no map of where might get wet
• fragmented responsibility for delivery
• low skills base outside consultancies
• 33 boroughs, therefore 33 ways of working
• Summer floods 2007 - £3bn insured losses
• Government commissioned ‘Pitt Review’
• Flood and Water Management Act
Drain London – How? Tier 1• Scope project• Collate data• Build partnerships• Develop framework for effective workingTier 2• Model risk in each borough• Identify ‘critical drainage areas’• Develop surface water management plan
– Build borough capacity and encourage ownershipTier 3• Prioritise strategic vs local projects• Provide funding for priority projects• Implement some quick win demonstration projects• Initiate a ‘community flood plan’ programme
1
2
3
4
5
67
8
Source: Drain London
Surface water flood risk
1% AP + climate change
LLFAs – next steps
Local Flood Risk Strategy & Management Plan
Flood Risk Regs 2009
National level evidence
EA National Flood & Coastal Management Strategy• PPS 25
Regional level evidence
CFMPRFRARBMPTE2100
Local level evidence
PFRASWMPSFRA could be built into a single document
Flood & Water Management Act 2010
North Circular/A10 underpass
North Middx Hosp
Flood Depth – CDA Group4_009 1in 100year +CC
Watermill Lane – cul de sacContaining Care home & NHS ancillary plant
How will climate change increase flood risk?
Average Monthly Rainfall: All Scenarios against Baseline
20.0
25.0
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
J F M A M J J A S O N D
Rai
nfa
ll (m
m/m
on
th)
1961-1990 Baseline Rainfall 2020s 2050s 2080s
Projecting future flood risk
Source : Ofwat (July 2010). Changes in the frequency of extreme rainfall for selected towns and cities. http://www.ofwat.gov.uk/sustainability/climatechange/rpt_com_met_rainfall.pdf
Closing the ‘adaptation gap’
Links between Drain London and Rain Gain
- We have a ready-made Forum of key stakeholders
- “enabling environment” for testing the outputs from Rain Gain
- facilitate a full scale trial implementation in a borough
- joint capacity development at local government level
- Potential collaboration in additional fund raising
- We have good working relationship with national government
GLA will support improved rainfall monitoring over Greater London
GLA will promote and support link with other stakeholders and implementation of the project deliverables through the Drain
London network
Ofwat DefraHighways Agency
Met Office GLA
Thames Water
Environment Agency
Fire Brigade
RedbridgeEmergency
PlanningDepartment
Local Council
RedbridgeHighways
and Engineering
Metropolitan Police
Service
Transportfor London
RedbridgePlanning
DepartmentLocalCoucillors
National Express(RailwayOperator)
Riverside ConcernUtilities- gas,
electricity, water
Flood Wardens
Residents
Businesses
Flood Forecasting
Centre
Local Champions
Primary Stakeholders
Secondary Stakeholders
Tertiary Stakeholders
Regional and National Level Institutions
STAKEHOLDERS ORGANI – SOCIOGRAMUK CASE STUDY (LONDON BOROUGH OF REDBRIDGE)
Flow of information (1-way or 2-way, according to arrows)
Flow of information + close cooperation
Flow of information + potential conflicts
Potential flow of information
Potential cooperationStrong cooperation during flood events
Strong cooperation for flood forecasting
Canoe Club
Insurance Companies
?Maybank
Association
Redbridge Council for Voluntary Services
Broadmed Road
Baptist Church
Redbridge Flood Forum
RedbridgeNHS
Schools and
Daycares
Youth Groups
Multipliers
MEDIA
(Redbridge Life, Ilford Recorder,
Redbridge I, radio)
