Bristol Local Flood Risk Management Strategy · 2020. 2. 5. · Slide 9 Growth and Regeneration...
Transcript of Bristol Local Flood Risk Management Strategy · 2020. 2. 5. · Slide 9 Growth and Regeneration...
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Growth and Regeneration
Flood Risk and Data Management
Bristol Local Flood Risk Management Strategy 13-Feb Scrutiny (above: River Avon overtopping into Floating Harbour during Jan-14 surge)
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Growth and Regeneration
Flood Risk and Data Management
Citywide Flood Strategy
First published in 2014, formal update in 2017
Delivery plan with specific actions
Covers all activities from large flood schemes to emergency response
Strong partnership working
Community engagement
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Growth and Regeneration
Flood Risk and Data Management
Summary of Work Completed
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Flood Risk and Data Management
2019/20 Key Achievements
Strategy Objective 2019/20 Key Achievement
1 – Understand the Risk EU funded RESCCUE Project
near completion (four year
programme)
2 – Manage the Likelihood Harbour Asset Surveys
complete
3 – Help People Manage their
Own Risk
Recruited 11 Flood Wardens
4 – Promote sustainable
development
SFRA near completion
5 – Improve preparedness for
flood events
Established flood reporting and
monitoring tool (FORT)
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Growth and Regeneration
Flood Risk and Data Management
2020 - Strategy Refresh
Existing Strategy is based on Environment Agency national Strategy (2011)
EA Strategy is being updated (Spring 2020)
We propose to update our Strategy in line with the EA
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Growth and Regeneration
Flood Risk and Data Management
EA Strategy
Core themes:
Climate resilient places
Today’s growth and infrastructure – resilient to tomorrows climate
A nation of climate champions
Benefits, costs and funding
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Growth and Regeneration
Flood Risk and Data Management
EA Strategy
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Growth and Regeneration
Flood Risk and Data Management
River Avon Flood Risk Management Strategy
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Growth and Regeneration
Flood Risk and Data Management
Bristol is at risk of two sources of flooding from the River Avon
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Tidal flood risk from Severn Estuary. Fast (hours). Rapid, saline flood water. Hard to forecast surges. Climate change = rising sea level. Tidal flow comes up river.
Fluvial flood risk from large catchment. Long floods (days). Climate change = increasing storm intensity and river flows. Fluvial flow comes down river.
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Growth and Regeneration
Flood Risk and Data Management
A4 Portway
Temple Meads
What could a flood be like, tomorrow? ‐ 1,000 homes &
businesses at tidal risk today (assumes harbour flood gates closed).
‐ Hazardous fast/deep flood water is a risk to life.
‐ Overtopping directly from river and also from harbour.
‐ Lasting, widespread impact. Contaminated water will damage property, disrupt firms & sever road network.
‐ West of Temple Meads predominantly tidal risk. East of TM risk more fluvial.
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Fluvial Tidal Both
Harbourside Roads
Properties next to
New Cut
Roads adjacent to New
Cut
St Philips Marsh
Properties at Netham
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Flood Risk and Data Management
Jan 2014 tidal near-miss Examples: 1968 fluvial floods
- High tide with minor surge (+0.8m). - Flood barrier used. - Flooded roads & several harbourside properties. - Damaged river walls. - Peak levels 0.1m lower than Dec-1981.
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Growth and Regeneration
Flood Risk and Data Management
Threat increases significantly with continuing sea level rise
‐ 2,300 homes & 1,350 businesses (existing) at tidal risk by 2115
‐ £1.6bn flood damage to UK over 100years
‐ Impact on local economy ~£4bn due to commerce, tourism & planned development.
‐ New developments must prove safe from flooding (with climate change) and not increase risk to others.
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Fluvial Tidal Both A4
Portway
Temple Meads Harbourside
Roads
Properties next to New
Cut
Roads adjacent to New
Cut
St Philips Marsh
Properties at
Netham
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Flood Risk and Data Management
River Avon flood strategy objectives
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Support the safe living, working and travelling in and around central Bristol by ensuring flood threat is reduced and measures address residual risks.
Facilitate sustainable growth of Bristol and West of England by supporting opportunities for employment and residential land, and infrastructure.
Maintain, and where possible enhance, natural, historic, visual and built environment.
Ensure navigation of river and marine activities continue.
Ensure strategy technically feasible and deliverable (including value for money).
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Growth and Regeneration
Flood Risk and Data Management
2019/20 Update and Next Steps
Detailed technical assessments continue
Arup commission, completion due in Autumn 2020
Inform options feasibility
Revision to climate change guidance
Community awareness raising
Opportunity to align comms with Western Harbour and Temple Quarter
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Flood Risk and Data Management
Discussion