Transcript A.Nickson presentation

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 working
Tier 2
• Model risk in each borough
• Identify ‘critical drainage areas’
• Develop surface water management plan
– Build borough capacity and encourage ownership
Tier 3
• Prioritise strategic vs local projects
• Provide funding for priority projects
• Implement some quick win demonstration projects
• Initiate a ‘community flood plan’ programme
4
2
5
3
1
7
8
6
Surface water flood risk
1% AP + climate change
Source: Drain London
LLFAs – next steps
Flood Risk Regs 2009
Flood & Water Management Act 2010
Local Flood Risk
Strategy &
Management Plan
National level
evidence
Regional level
evidence
Local level evidence
EA National
Flood &
Coastal
Management
Strategy
•PPS 25
CFMP
RFRA
RBMP
TE2100
PFRA
SWMP
SFRA could be built into
a single document
Flood Depth – CDA Group4_009 1in
100year +CC
North Circular/A10 underpass
Watermill Lane – cul de sac
Containing Care home & NHS ancillary plant
North Middx Hosp
How will climate change increase flood risk?
Average Monthly Rainfall: All Scenarios against Baseline
70.0
65.0
Rainfall (mm/month)
60.0
55.0
50.0
45.0
40.0
35.0
30.0
25.0
20.0
J
F
M
A
M
J
1961-1990 Baseline Rainfall
J
2020s
A
S
2050s
O
2080s
N
D
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
STAKEHOLDERS ORGANI – SOCIOGRAM
UK CASE STUDY (LONDON BOROUGH OF REDBRIDGE)
Youth
Groups
Canoe Club
Schools
and
Daycares
Tertiary
Stakeholders
Flood
Wardens
Broadmed
Road
Baptist
Church
Redbridge
Flood
Forum
Maybank
Association
Redbridge
Council for
Voluntary
Services
Residents
Businesses
Insurance
Companies
?
Utilities- gas,
electricity,
water
Riverside
Concern
Redbridge
NHS
Local
Coucillors
Secondary
Stakeholders
Transport
for London
Redbridge
Planning
Department
Redbridge
Highways
and
Engineering
National
Express
(Railway
Operator)
(Redbridge
Life, Ilford
Recorder,
Redbridge I,
radio)
Fire Brigade
Metropolitan
Police
Service
Thames
Water
Primary
Stakeholders
MEDIA
Local Council
Flood
Forecasting
Centre
Environment
Agency
Redbridge
Emergency
Planning
Department
Local
Champions
Ofwat
Defra
Highways
Agency
Met Office
GLA
Regional and National Level Institutions
Flow of information (1-way or 2-way, according to arrows)
Potential flow of information
Flow of information + close cooperation
Potential cooperation
Flow of information + potential conflicts
Multipliers
Strong cooperation for
flood forecasting
Strong cooperation
during flood events
Contact details:
Alex Nickson
GLA
[email protected]
+44 (0)207 983 4322