Slide 1

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)

Slide 2

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

Slide 3

Growth and Regeneration

Flood Risk and Data Management

Summary of Work Completed

Slide 4

Growth and Regeneration

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)

Slide 5

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

Slide 6

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

Slide 7

Growth and Regeneration

Flood Risk and Data Management

EA Strategy

Slide 8

Growth and Regeneration

Flood Risk and Data Management

River Avon Flood Risk Management Strategy

Slide 9

Growth and Regeneration

Flood Risk and Data Management

Bristol is at risk of two sources of flooding from the River Avon

9

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.

Slide 10

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.

10

Fluvial Tidal Both

Harbourside Roads

Properties next to

New Cut

Roads adjacent to New

Cut

St Philips Marsh

Properties at Netham

Slide 11

Growth and Regeneration

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.

Slide 12

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.

12

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

Slide 13

Growth and Regeneration

Flood Risk and Data Management

River Avon flood strategy objectives

13

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).

Slide 14

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

Slide 15

Growth and Regeneration

Flood Risk and Data Management

Discussion