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Using natural processes to reduce
flood risk
experiences from Trent Rivers Trust…….
Ruth Needham, Trent Rivers Trust
Experiences from Trent Rivers Trust
• What is ‘Working with Natural
Processes’ (WWNP)
• Why do we need WWNP?
• Why is it of interest to Trent
Rivers Trust?
• How to go about it
• Some case studies
• A summary
What is ‘Working with Natural
Processes’
In the
catchment
Changing and managing the
surface (increase porosity)
Promoting good soil management,
reducing compaction
Impede the flow
Create storage
Source control – work where the rain falls
Applies in rural AND urban areas
At or in
the
channel
Slow or narrow the flow
Increase the roughness (friction)
Reduce the conveyance (speed)
Using natural processes to reduce flood risk; experiences from Trent Rivers Trust
Why do we need WWNP?
Range of benefits
• Flood risk
• Improved water quality
• Creates habitat
• Reduces erosion and soil loss
• Provides a focus for people and
communities
• Cheaper to build than traditional
flood managment schemes
• Legacy? Long term awareness?
Need to broaden our approach to water
management
• Increasing flood risk
• Channels at capacity
• Need more than ‘defend and dredge’
• Climate change
• Soil loss
• Incorporate a range of techniques
• Requires a Catchment Based Approach
• Involves partners – gets everyone thinking
about flood risk
Why is it of interest to Trent Rivers Trust?
• Delivers a range of water based
benefits
• Easier and cheaper to work with
smaller volumes of water
• Work at range of scales; site,
landscape and catchment. Plays to
our strengths (work with farmers,
communities, partners)
• Create schemes that compliment the
landscape, bespoke solution for
individual sites. Solutions are
unobtrusive.
How to go about it? What are the pitfalls?
• Allow plenty of time for planning
• Funding – standard flood risk funding sources not
yet tailored well to NFM
• Partner support – work with range of stakeholders
• Use local knowledge, carry out a desk study
• Make the most of the data (+/- of modelling)
• Secure agreement from landowners
• Be creative about incentives
• Carry out surveys well in advance
• Think about maintenance as part of your design
• May require Land Drainage Consent (LLFA) and
Planning Permission (LPA)
• Include an evaluating and monitoring plan, can be
expensive
SCIMAP outputs – highlights where water accumulates
Case Study
Southwell Catchment Project
• Scoping and
feasibility project
• Farm advisory
project
• Capital projects
Willow
Brook
Site visit!
Case Study Soar NFM project
Using natural processes to reduce flood risk; experiences from Trent Rivers Trust
Case Study
Leicester SUDS ’n’ Schools Project Shady Lane Arboretum, Leicester
Britain in Bloom New Landscape of the Year 2015 (East Midlands)
Rain Garden at the Strutts Centre, BelperCase Study
Leisure Centre, MeashamCase Study
Front
Back
Before After
In summary
• Lots of opportunities
• Be creative
• Need to work in partnership
• Engage with communities and landowners
• Start planning early on, don’t underestimate
potential for complications
• Think about the maintenance
• Construction cheaper than traditional solutions
• Long term benefits
• Bring about some inspiring sites
Thank you
Ruth Needham
Email ruth@trentriverstrust.org
Mobile 07773 343635

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Using natural processes to reduce flood risk; experiences from Trent Rivers Trust

  • 1. Using natural processes to reduce flood risk experiences from Trent Rivers Trust……. Ruth Needham, Trent Rivers Trust
  • 2. Experiences from Trent Rivers Trust • What is ‘Working with Natural Processes’ (WWNP) • Why do we need WWNP? • Why is it of interest to Trent Rivers Trust? • How to go about it • Some case studies • A summary
  • 3. What is ‘Working with Natural Processes’ In the catchment Changing and managing the surface (increase porosity) Promoting good soil management, reducing compaction Impede the flow Create storage Source control – work where the rain falls Applies in rural AND urban areas At or in the channel Slow or narrow the flow Increase the roughness (friction) Reduce the conveyance (speed)
  • 5. Why do we need WWNP? Range of benefits • Flood risk • Improved water quality • Creates habitat • Reduces erosion and soil loss • Provides a focus for people and communities • Cheaper to build than traditional flood managment schemes • Legacy? Long term awareness? Need to broaden our approach to water management • Increasing flood risk • Channels at capacity • Need more than ‘defend and dredge’ • Climate change • Soil loss • Incorporate a range of techniques • Requires a Catchment Based Approach • Involves partners – gets everyone thinking about flood risk
  • 6. Why is it of interest to Trent Rivers Trust? • Delivers a range of water based benefits • Easier and cheaper to work with smaller volumes of water • Work at range of scales; site, landscape and catchment. Plays to our strengths (work with farmers, communities, partners) • Create schemes that compliment the landscape, bespoke solution for individual sites. Solutions are unobtrusive.
  • 7. How to go about it? What are the pitfalls? • Allow plenty of time for planning • Funding – standard flood risk funding sources not yet tailored well to NFM • Partner support – work with range of stakeholders • Use local knowledge, carry out a desk study • Make the most of the data (+/- of modelling) • Secure agreement from landowners • Be creative about incentives • Carry out surveys well in advance • Think about maintenance as part of your design • May require Land Drainage Consent (LLFA) and Planning Permission (LPA) • Include an evaluating and monitoring plan, can be expensive SCIMAP outputs – highlights where water accumulates
  • 9. • Scoping and feasibility project • Farm advisory project • Capital projects Willow Brook Site visit! Case Study Soar NFM project
  • 11. Case Study Leicester SUDS ’n’ Schools Project Shady Lane Arboretum, Leicester
  • 12. Britain in Bloom New Landscape of the Year 2015 (East Midlands) Rain Garden at the Strutts Centre, BelperCase Study
  • 13. Leisure Centre, MeashamCase Study Front Back Before After
  • 14. In summary • Lots of opportunities • Be creative • Need to work in partnership • Engage with communities and landowners • Start planning early on, don’t underestimate potential for complications • Think about the maintenance • Construction cheaper than traditional solutions • Long term benefits • Bring about some inspiring sites
  • 15. Thank you Ruth Needham Email ruth@trentriverstrust.org Mobile 07773 343635

Editor's Notes

  1. TRT is a charity, part of the network of Rivers Trusts. We operate across the Trent. Small team, a few of us here today. Specialists in water and its interaction with the land
  2. In the catchment5 Remove hard surfaces, plant trees, reduce vegetation management, Allow drainage, root penetration, avoid compaction Change land levels, build berms Create swales, wetland, basins At or in the channel 1)Bankside measures, buffer strips 2) Meanders, river restoration 3) Riffles Urban and rural---concepts very similar
  3. What is WWNP?
  4. Many things to think about, still on somewhat of a learning curve, some things done better than others.
  5. Good example of area where multiplayers safety approach is applicable, lots of different streams of work available to us and the partnership. Learnt a lot already about how to work together, won’t say too much more as others speaking about Southwell today.