The number of natural disasters
seems to be increasing, as are the
number of people affected.
(Note that the number of people actually
killed by natural disasters has declined
significantly over the period).
Achieving resilience is therefore a process,
spanning multiple activities and time-scales
Long run risk
Learn and Improve
Hat tip to Peter Williams for the diagram
i. Surface water flooding.
ii. Groundwater flooding
iii. River flooding.
iv. Coastal and tidal flooding
v. Reservoir or dam failure.
vi. Burst water mains.
vii. Sewer flooding.
Where can a flood come from?
Rapid Heavy Rain
Catches you by surprise
In Flood Zone 3, edge of Zone 2
Unlikely, but on edge of zone
What to plan for at Sheaf Street
Leeds flood risk documents
EA flood map (more simple map)
Flood Zone 2 – Medium Probability 0.1% - 1% chance
This zone comprises land assessed as having between a 1 in 100 and 1 in 1,000 annual
probability of river flooding (1% – 0.1%), or between a 1 in 200 and 1 in 1,000 annual
probability of sea flooding (0.5% – 0.1%) in any year.
In this zone, developers and local authorities should seek opportunities to reduce the overall
level of flood risk in the area through the layout and form of the development, and the
appropriate application of sustainable drainage systems
Flood Zone 3a – High Probability >1% chance
This zone comprises land assessed as having a 1 in 100 or greater annual probability of
river flooding (>1%), or a 1 in 200 or greater annual probability of flooding from the sea
(>0.5%) in any year.
In this zone, developers and local authorities should seek opportunities to:
reduce the overall level of flood risk in the area through the layout and form of the
development and the appropriate application of sustainable drainage systems;
relocate existing development to land in zones with a lower probability of flooding; and
create space for flooding to occur by restoring functional floodplain and flood flow
pathways and by identifying, allocating and safeguarding open space for flood storage.
This is considered a low risk ( but map is useful)
City domains are interconnected
So floods affect a lot of things!
Note what is happening locally: 2016
Flood alleviation movable weir
• Based on UN ISDR’s “Ten Essentials” of disaster management.
Where to get Live Flood Warnings
0345 988 1188
This service sends you a direct message when flooding is expected and may affect your
property. You can receive warnings by telephone, mobile, email, SMS text message or
fax, whichever you prefer. You can also view flood warnings through the Environment
Or via Twitter: follow @EnvAgency
Or on Facebook: www.facebook.com/FloodAlerts (England and Wales)
Action: Understand changing
upstream water levels
Action: Understand changing upstream water levels
Another source of information
• Significantly reduce financial losses, damage to property and business
• Help compliance with regulatory requirements (for example, Occupier’s
Liability Act 1984);
• Reduce exposure to civil or criminal liability;
• Enhance your company’s image and credibility with employees, customers,
suppliers and the community;
• Help fulfil your moral responsibility to protect employees, the community
and the environment;
• Help you to obtain insurance cover.
WHY HAVE A FLOODRISK PLAN?
Questions to be considered
1. How are employees family affected?
2. How do people communicate with you?
3. Who is available to responde?
4. Who are the decision makers & where are they
5. What preventitive maintenance is needed (e.g. drain outside)
6. What is the fuel supply? (do you have electicity generators?)
7. What about your supply chain –up and downstream
8. Many more to be added here…
According to a report prepared for Defra in 2007, repairing a house
after a flood was estimated to cost between £10,000 and £50,000
depending on the flood depth. This will now have increased still
further, owing to inflation*.
What does it cost to fix?
Specific actions: before, during and after an event
What can you do to:
• Lessen the impact of the event
• Reduce risk of injury/loss of life
• Protect critical resources
• Shorten time to recovery
The Flood Plan should clearly list actions needed on receipt of a
flood warning, such as how to set up any temporary flood protection devices
as well as giving a maintenance schedule to ensure correct operation of
devices in the future.
The plan should take account of the possibility of flood protection devices failing
or their design being exceeded.
What is the plan when a Flood Warning is issued?
Action: Create A Flood Review Document (this is it)
Action: On site ‘Walk around’ Discussing the Risks & actions
Action: Create a Flood Plan
Action: Install/Purchase any useful products
Action: Communicate the plan
Action: Test the plan
Action: Fill in this Flood Plan template
Action: Create Some local social cohesion ahead of time
Invite Locals in the same situation:
AECOM world experts are nearby
Help them to help you
Leeds City Council
In the event of flooding, you can contact the council for advice on 0113 222 4407
(Monday to Friday, 9am to 5pm). In an emergency or outside of these hours, contact:
0113 376 0499.
How to report Flooding :
Sandbag policy – try to plan for yourself, however some stock are available to request
In past few days
rate was going
down about 0.5m in
How long before the river drops
Looking at rate of earlier river level dropping at a few sites on the Aire after the rain stopped
for a while.
The rate is about 0.5m in 24hrs from 6:00pm to 6:00pm for Armley
I would expect that the with record levels then the rate of reduction will be a quicker because
runoff is quicker:
Crown Point going
down at 0.5m in 12
hours, = 1m per hour
In Summary at Crown Point I would expect
The river level to Drop by 1m per 24 hours for the next day or two (with no rain
Monday & Tuesday)
Then as levels are more normal I would expect the river levels to drop at 0.5m per 24
hours from around Wednesday if no rain.
More rain is predicted for Wednesday so it is likely to rise really quickly because the
ground is saturated, the recent rate of rise has been 1m in 18 hours (it fills up quickly)