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Chaired by Prof Laurence Smith
Managing Director, South West Water
The case for resilient catchments
Improving resilience through
collaboration
Dr Stephen Bird
Managing Director, South West Water
4
SOUTH WEST WATER REGION AND RESPONSIBILITIES
• Population of 1.7m
• 70,000 businesses
• Dispersed population
• Many tourists – pop. swells to
8m in summer
• A unique environment:
35% of England’s designated
bathing waters
19% of England’s designated
shellfish waters
National Parks, ANOBs, SACs,
Biosphere Reserve , NIA, etc
5
RESILIENCE CHALLENGES
Flooding Drought Coastal Erosion
6
The resilience challenge for SWW
RESILIENCE
RECENT DEVELOPMENTS IN THE WATER INDUSTRY
(1) Cabinet Office: ‘Keeping the Country Running’ – Natural Hazards and Infrastructure
(2) Ofwat: ‘Towards Resilience – How we will Embed Resilience in our Work’
(3) Resilience Task and Finish Group Report
(4) Ofwat: ‘Reliable services for customers – consultation on Ofwat’s role on resilience
WHY IS IT A HOT TOPIC?
WHY IS IT A HOT TOPIC?
• Climate change and population growth
• Scarcity and affordability concerns
• Financial and economic pressures
WHAT DOES RESILIENCE MEAN?
“Resilience is the ability to cope with, and to recover
from, disruption and anticipate trends and
variability in order to maintain services for people
and protect the natural environment”
HOW CAN THE SECTOR EMBED RESILIENCE?
• Long-term planning
• Innovation
• Investing based on whole-life costs and benefits
8
THE NATIONAL RESILIENCE POLICY DEBATE
• Recognition of the need to change
• New duties and focus
• Lots of parliamentary reviews post winter 2015 flooding
• New ways of working - developing catchment solutions
• Ministerial hands on approach- eg Somerset Levels
• Much debate over design standards and practices
• Should we wait for central policy ?
9
CATCHMENT MANAGEMENT COSTS IN THE SW
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
Wessex South West Southern
Cost per Bill Payer 2015-2021
CAP LA FCERM (capex) FCERM (opex)
Insurance Highway Agency Voluntary NVZ Regulation
Catchment Partners Local IDBs EA Environment Spend
RESILIENCE
WHAT SOUTH WEST WATER IS ALREADY DOING
WHY IS IT A HOT TOPIC?
• ORGANISATIONAL SECURITY
Operational innovation
Skills development and apprentice programmes
• SERVICE & ENVIRONMENTAL PERFORMANCE
Upstream and Downstream Thinking
WaterShare performance monitoring framework
• FINANCIAL VIABILITY
Efficient equity and debt finance base
Growth opportunities
Payment for Eco-system Services (PES)
Flood defence funding and support
1
1
CATCHMENT RESILIENCE
SOUTH WEST WATER CATCHMENT RESILIENCE PLANNING
DOWNSTREAM THINKING
Multi-agency, multi-benefit approach to
sustainable improvements in urban flooding and
drainage
SuDs, highway drainage, landscaping and active
network monitoring & management
Pilot approaches, trialling innovative behaviours
and techniques
UPSTREAM THINKING
• Multi-partner, multi-benefit approach to improving
raw water quality and natural water storage
• 11 catchments in the South West targeted for
moorland and agricultural improvements
12
Upstream Thinking
Flagship environmental project
£9m (2010-15) £10m (2015-20)
Partnership delivery
2 workstreams:
- moorland restoration
- agricultural improvements
Focus on water
quality
Improving natural water
quality and water storage in
the landscape
Catchment quality issues and WTWs
Pesticides, crypto,
colour…
N
Algae,
metaldehyde…
Pesticides,
algae…
Bacteria,
crypto,
Geosmin
Nutrients,
pesticides,
DO,
turbidity…
Metaldehyde,
colour, crypto
Catchment interventions:
Cornwall Wildlife Trust (CWT)
Devon Wildlife Trust (DWT)
Westcountry Rivers Trust (WRT)
Exmoor Mires Partnership (EMP)
Exmoor National Park (ENPA)
Scientific monitoring:
University of Exeter
Project partners
South West Water
Catchments
River Exe
River Dart
River Tamar
River Fowey
Cofton Cross and Otter
Fernworthy
Barnstaple Yeo
Argal & College
River Cober
Drift
Who and where?
Film: Upstream Thinking -
https://youtu.be/Fb6e_e3f5Cc
SWW BENEFITS FROM PARTNERSHIP DELIVERY OF
CATCHMENT MANAGEMENT
• Match funding from sources SWW cannot access
• Extra delivery by the partners in areas that SWW is less able to fund
such as biodiversity
• Use of a 3rd party for delivery brings greater success - the honest
broker approach
• Builds partnership support from stakeholders
• Customer support and reputational benefits
FUTURE SOLUTIONS FOR THE SOUTH WEST
• We must reach a common understanding on infrastructure resilience needs &
solutions
• Need to balance scarce resources to respond to challenges and continue to
work in partnership to leverage investment through matched funding
opportunities
• Need to translate central policy, when it comes, to local actions plans
1
9
DEVELOPING A COMMON UNDERSTANDING
• Undertake joint research and data analysis
• Create a common understanding of the hazards and risks
• Working with universities, flood forecasting centre and Met Office to quantify
risks and impacts
• Work with lead flood authorities, local land drainage boards, Environment
Agency, farmers, developers and other utilities – encourage sharing of
strategies and action plans
20
Water Stewardship Manager, WWF
www.waterlife.org.ukwww.waterlife.org.uk WWF registered charity no.1081247, a company limited by guarantee no. 4016725
WATERLIFE is funded by EC LIFE+. Project number: LIFE13 ENV/UK/000497
Water stewardship: a
framework for engaging
business in catchment
management
Lucy Lee
Water Stewardship Manager, WWF-UK
Rivers Trust Conference
13th September 2016
www.waterlife.org.uk
Focus of the presentation
1. Why water matters to UK business
2. How water stewardship provides a framework for engaging
business in catchment management
3. WWF’s action to date to engage business in catchment
management in the UK and plans for supporting increased
engagement
www.waterlife.org.uk
Message 1 - It makes
business sense for the
corporate businesses to play
a long-term role in WFD
delivery.1. It makes business sense for the corporate
businesses to play a long-term role in
WFD delivery.
1.Why water matters to UK
business
www.waterlife.org.uk
Water matters to business
• The WEF’s Global Risk Report 2015 ranked “water
crises” as the top risk to global growth.
• Freshwater species have declined by 76% since
1970.
• ½ European rivers and 17% of English rivers meet
Good Ecological Status.
• The drivers of the economic water risks are the
same as those for the decline in freshwater species:
 physical water scarcity
 poor management of the rivers, lakes and
aquifers which supply our water.
www.waterlife.org.uk
Physical
• Flooding
• Water scarcity
• Water quality
Regulatory
• 20-30% compliance gap
• Changes through Water Act and legislation
• Regulatory uncertainty associated with Brexit
Reputational
• Associated with impacts on communities and
ecosystems
Opportunity framing can be useful to engage
The River Mimram, Hertfordshire
during drought
Diffuse pollution caused by food and
drinks supply chain
UK business water risks & opps
www.waterlife.org.uk
2. How water stewardship provides a
framework for engaging business in
catchment management
www.waterlife.org.uk
Water
Awareness
Collective
Action
Influence
Governance
Internal
Action
WWF’s Water Stewardship
Framework
Knowledge
of Impact
Internal water management
Businesses understand their
impact and take action to
better manage water in their
own operations and supply
chains
Water stewardship
Businesses engage beyond
their own operations and
supply chains
www.waterlife.org.uk
WS as a framework for engaging
business in CM
• Water risks are a result of cumulative water use in
catchments
• Internal water management is therefore not
sufficient to manage water risks or maximise
opportunities
• Businesses need to work collectively with
stakeholders in catchments where they have a
hotspot of water risk to develop integrated solutions
• The catchment management approach provides a
perfect framework to enable this and engage
business in supporting delivery of the WFD
www.waterlife.org.uk
1. We are working in East Anglia, England to
demonstrate and test this approach.
3. WWF’s action to date to engage
business in catchment management and
plans for supporting increased
engagement
www.waterlife.org.uk
Collective action with
business – River Nar
Aim Deliver environmental improvements
through collaborative delivery
• Funded by Coca Cola
• Addressing reputational risks associated with
diffuse pollution in the sugar supply chain
• Brought together a range of partners
including Norfolk RT, the NFU, NE
Actions
• Creation of Local WFD Catchment Plan
• Engaged farmers to improve over 2000 acres
of land
• Re-meandering channels
www.waterlife.org.uk
Collective action – WaterLIFE
• Though our WaterLIFE project we are
engaging additional businesses in
catchment management
• Focus on engaging farmers to reduce
agricultural pollution
• Two catchments
 Cam-Ely-Ouse and Broadlands
• AIM: scale up the approach and learning
from our work in the River Nar and drive
broader change in East Anglia
www.waterlife.org.uk
Supporting increased business
engagement in CM
We are working with the RT to create a
CaBA related work package around water
stewardship.
• Higher resolution data for England via the
Water Risk Filter
• Guidance on water stewardship for the
food and drink sector in England
Its early day so watch this space for more
information.
www.waterlife.org.uk
Influencing governance
• Joint action to ensure the right policies and rules are in
place to enable the water environment to improve.
• Without changes in governance it will be impossible for
businesses to mitigate their business risk.
• Through our partnership with Coca Cola, we have
supported a number of actions:
 Government & business WFD roundtable.
 Sugar beet workshops
 Secretary of State visits
 Business to business engagement
 Joint activities at party conference
 Joint report launches with government – The Chalk Stream
report
www.waterlife.org.uk
In conclusion
1. Water matters to UK businesses
2. Water stewardship provides a framework for
engaging business in catchment management
3. WWF is taking action to engage business in
catchment management and is developing a
toolkit with the RT to support increased
engagement
www.waterlife.org.uk
Questions?
Thank you
Technical Specialist – Environment Agency
The condition of soils in our catchments and
the impact on the water environment
Richard Smith
Technical Specialist – Environment Agency
Enhanced runoff
Infiltration
The condition of soils in the South West
Soil degradation in relation to runoff
Severe
Moderate
High
Low
Soil condition assessment
% clay
Areas surveyed in the South West (2002 to 2011)
Hampshire
Avon
Frome
Axe & Otter
Tone and Parrett
Bristol Avon
Creedy
& Culm
Torridge & Tamar
Marazion
Bodmin
Soil structure degradation in the South West
during winter months
0
10
20
30
40
50
60
70
1 (87) 2 (123) 3 (112) 4 (46) 5 (2087) 6 (62) 7 (623) 8 (49)
Soil type
Percentageoccurrence
Severe
High
Moderate
Low
Shallow
calcareous
Deeper
calcareous
Pelosols Brown
podzolic
Brown
earths
Brown sands Stagno-
gley
Ground-
water gley
Soil type
Soil structure degradation in the South West
during winter months
0
10
20
30
40
50
60
70
80
Potatoes
(70)
Maize
(198)
Winter
cereals
(670)
Stubble
(166)
Ley grass
(638)
Total
cultivated
(2032)
Permanent
grass
(1154)
All sites
(3243)
Land use
Percentageoccurrence
Severe
High
Moderate
Low
Potatoes
(70)
Maize
(198)
Winter
cereals
(670)
Stubble
(166)
Ley grass
(638)
Total
cultivated
(2032)
Permanent
grass
(1154)
All sites
(3243)
60% runoff from grassland with moderate soil structure
2% runoff from grassland with good soil structure
Measuring runoff at Boscastle
The Rivers Trust Autumn Conference: Day 2 - Session 1
The Rivers Trust Autumn Conference: Day 2 - Session 1
The Rivers Trust Autumn Conference: Day 2 - Session 1
The Rivers Trust Autumn Conference: Day 2 - Session 1
Summary
Soil surveys in the South West have found a widespread
problem with soil condition affecting runoff
The runoff problem is exacerbated by bad weather and
commercial pressures faced by farmers
The South West is a high risk area and the environmental
impact is serious
Reader in Physical Geography, University of Leicester
Pesticides in water – challenges and
opportunities
Mick Whelan
The Rivers Trust Autumn Conference: Day 2 - Session 1
Maximum concentrations
observed at Grimsbury
Cpropyzamide
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1 2 3 4 5 6 7 8 9 10 11 12
months
conc(Average)
Cpropyzamide
Ccarbetamide
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1 2 3 4 5 6 7 8 9 10 11 12
months
conc(Average)
Ccarbetamide
Average monthly
propyzamide
concentrations at
Grimsbury
Average monthly
carbetamide
concentrations at
Grimsbury
CONTEXT: Concentrations of some pesticides
periodically challenge DWD compliance
Cherwell: Field-scale monitoring
Hypothesis: Field drains are a major
conduit for herbicide transfer to the
Cherwell
Drain flow monitoring
www.le.ac.uk
Herbicide concentrations in drain flow
Very rapid,
significant transfer
to field drain in the
first event post
application
Concentration
recession mirrors
hydrograph
recession
Propyzamide
losses 1.1% of
applied
Carbetamide
losses 8.6% of
applied
Metaldehyde
Widely used for slug control
Aqueous solubility: 222 mg L-1 at 20°C
Low KOC: 85 L kg-1
Soil DT50: 4.5 – 73 days
No photolysis or hydrolysis
Difficult to remove in treatment
→ “Undertakings”
From UKWIR report 2014
www.le.ac.uk
What to do?
• Buffer Zones?
• Hard surface management?
• Reduce total inputs?
• In drain or ditch treatment?
• Better soil management?
• Operational controls on abstraction?
Reduce total
inputs?
Storage
(Soil 1)
Rain ETa
Drainage
Storage
(Soil 2)
Drainage
OLF
Rain ETa
OLF
Qmod
Rainfall
Drainflow Surface
Water
Groundwater
Recharge
Solid phase
Liquid phase
Air phase
Saturated
θsat
Field
Capacity
θ5
θ200θ150050%
of θ1500
Interactive water Mobile water
Pre-event depth
of pesticide
penetration
Pesticide
Pesticides subject to:
• Linear sorption
• First-order
degradation
θ0
j
Mixed land use
0
20
40
60
80
100
120
140
0
0.5
1
1.5
2
2.5
3
Q(m3/s)
Conc(ug/L)
Date
C pest 1
C pest 2
C pest 3
C pest 4
C pest 5
mod Q
Modelled exposure from hypothetical application scenario
Reduce total
inputs?
Baseline Scenario: 5 actives applied to
different crops at different times
0
20
40
60
80
100
120
140
0
0.5
1
1.5
2
2.5
3
Q(m3/s)
Conc(ug/L)
Date
C pest 1
C pest 2
C pest 3
C pest 4
C pest 5
mod Q
Scenario A: Reducing the fraction of
managed grassland treated with pesticide
4 from 25% to 12.5%
Reduce total
inputs?
Modelled exposure from hypothetical application scenario
Scenario B: Not growing cereals on poorly drained
soil (Cereals moved to other soils, grass and some
OSR to heavy soil).
0
20
40
60
80
100
120
140
0
0.5
1
1.5
2
2.5
3
Q(m3/s)
Conc(ug/L)
Date
C pest 1
C pest 2
C pest 3
C pest 4
C pest 5
mod Q
Change locations
for key crops?
Modelled exposure from hypothetical application scenario
On-line treatment
Hope farm in Knapwell
(Cambridgeshire)
m asl
3.9 km2 catchment
0
50
100
150
200
250
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Q(L/s)
Metaldehydeconc.(ug/L)
Metaldehyde (ug/L) Inlet
Metaldehyde (ug/L) Outlet
Q V-notch (l/s) IN
Metaldehyde S. Wetland
y = 0.9048x + 0.0692
R² = 0.9043
0.0
2.0
4.0
6.0
8.0
10.0
0.0 2.0 4.0 6.0 8.0 10.0
Conc.OutletSW2(ug/L)
Conc. Inlet SW1 (ug/L)
Paired t-test for means – no
significant difference
between concentrations in
the inlet and outlet
0
10
20
30
40
Rainfall(mm/d)
0
2
4
6
8
10
12
14
16
18
20
0
10
20
30
40
50
60
70
80
90
100
Concmetaldehyde(ug/L)
Conc(ug/L)orQ(L/s)
QUINMERAC (ug/L)
METAZACHLOR (ug/L)
SA2-NP-OUT.PIPE
METALDEHYDE (ug/L)
Outflow Stops
N. Wetland
Dynamic model predictions
DT50 sed = 122 d
DT50 wat = 12.2 d
A = 210 m2
z = 0.5 m
0
10
20
30
40
50
60
70
80
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
0 100 200 300 400 500 600 700 800
Discharge(L/s)
Conc(ng/L)
Time (hours)
C pred
C meas
C input
Q meas
0
10
20
30
40
50
60
70
80
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
10000
0 100 200 300 400 500 600 700 800
Discharge(L/s)
Conc(ng/L)
Time (hours)
C meas
C input
Cpred
Q meas
DT50 sed = 122 d
DT50 wat = 12.2 d
A = 2100 m2
z = 1 m
Increase
area x10
Decrease in
peak conc
by 36%
Reduction in
total flux
<1%
Dynamic model predictions
Soil Management
Min / no-till now common
BUT may require higher applications
(e.g. of herbicides)
Subsoiling → ↑ transport to drains?
↑ aeration & ↑ degradation?
Soil compaction → ↑ OLF
More Research
Required!
Conclusions: Challenges (some)
• Concentrations of some pesticide active ingredients
occasionally challenge DWD compliance
• Problems particularly acute for compounds with low
treatment removal efficiency (e.g. metaldehyde)
• Field drains represent significant pathways in
heavy soils → limited benefits from farmyard
management + buffer zones
• Issues arise from multiple actors – need to get a
critical mass on board to achieve objectives
• DWD standards are absolute but effectiveness of
catchment management is subject to variability
Conclusions: Opportunities (some)
• Potential benefits for crop rotation changes
involving reduced total usage and changes in
application timings
• On line treatment wetlands (probably) of limited
value for catchment protection (need high wetland :
catchment area)
• Better understanding of catchment dynamics
could help to target interventions (e.g. on
vulnerable soils) and inform operational controls
(e.g. on abstraction)
• Soil management may offer (currently unknown)
benefits – more research needed!
Engineer, Arup
74
Current understanding of NFM and where we
go from here
Alexander Nicholson
@AlexNicho1
75
Natural flood management (NFM) is the alteration, restoration or use of landscape
features to reduce flood risk (POST, 2011).
What is Natural Flood Management?
POST. (2011). Natural Flood Management POSTNOTE 396. London, UK: Parliamentary Offices of Science and Technology. Retrieved from http://www.parliament.uk/briefing-papers/POST-PN-396
SLOW STORE FILTER
76
Benefits of NFM
• Reduction of peak flow at downstream receptors
• Reduced erosion (on land and in waterbodies)
• Reduced sediment delivery (capturing at source)
• Improved water quality (reduced costs to water companies)
• Habitat creation (terrestrial and aquatic)
• Drought reduction (and agricultural enhancement)?
Pickering
Holnicote
© National Trust
© Penny Anderson Associates
© National Trust
79
Stroud
Belford
81
PhD findings
𝑑𝑉
𝑑𝑡
= 𝑄𝑖𝑛 − 𝑄 𝑜𝑢𝑡
𝑄 𝑑𝑠 = 𝑄 𝑢𝑠 −
𝑑𝑉
𝑑𝑡
Analytical method: Monitored evidence:
Filling
Full
Emptying
10% reduction in flow from one pond!
Though – this was not the design event.
82
Modelling method: Modelled results:
PhD findings
𝐼 = ቐ
0 𝑖𝑓 𝑧 𝑠1 ≤ 𝑧 𝑠𝑤
𝑓𝑟 𝐶 𝑑
2
3
𝑏 2𝑔 𝑧𝑠1 − 𝑧 𝑠𝑤
1.5
𝑖𝑓 𝑧 𝑠1 > 𝑧 𝑠𝑤
𝑓𝑟 =
1.0 𝑖𝑓 𝑧 𝑠2 ≤ 𝑧 𝑠𝑤
1 −
𝑧 𝑠2 − 𝑧 𝑠𝑤
𝑧 𝑠1 − 𝑧 𝑠𝑤
1.5 0.385
𝑖𝑓 𝑧 𝑠2 > 𝑧 𝑠𝑤
83
• Water storage capacity ≈ 280 m3
• 70 ha contributing area
Multi-benefits
(sediment and water quality)
84
0
2
15min
rain(mm)
0.0
5.0
10.0
Flumestage
(cm)
0
0.2
0.4
TPconc.(mgl-1)
TP in TP out
0
100
200
300
SSconc.(mgl-1)
SS in SS out
0
2
4
6
8
NO3conc.(mgl-1)
NO3 in NO3 out
Retention (% concentration)
• SS: 25 – 67 (49% net retention)
• TP: 16 – 44 (33% net retention)
• NO3: 5 – 85 (18% net retention)
~ £2000 of work
85
Other initiatives
• Cumbria Floods Partnership (and action plan)
• Working with Natural Processes (and opportunity mapping)
• Defra model competition
• NERC Research Call (up to £6M)
86
Mapping
87
Mapping
88
Mapping – NFM+
89
Sub-catchment division
• How might the sub-catchments be interacting?
• How can this sort of analysis help with NFM and
catchment management?
Flow contribution
Q (m3/s)
t (hrs)
Combined flow
downstream
Thanks to Gareth Owen and Paul Quinn
91
NFM Tool (Knowledge sharing)
92
Estimating storage requirements and costs
1km
1km
How much storage is needed?
(Based on the Belford Study and other research)
Need approx. 2,000m3 / km2
If storage areas only fill up to 25cm, the area of land take
will be 8,000m2, which equates to 1% of the land*
Conservative costs:
£10 / m3
This means to deliver an NFM scheme for:
10km2 Catchment = £200,000
100km2 Catchment = £2,000,000
* Paul Quinn’s 5% future. Let’s also remember that these features only take up this area when full of water
93
Benefits and funding
FDGiA
OM1 – Damages avoided
OM2 – Moving risk bands
(Low, Medium, High)
OM4a – Water dependent
habitat
Partnership funding
Natural England
Forestry Commission
How many properties are you potentially benefiting?
Multiple locations and further downstream
94
Maintenance
AIMS
Asset description
Maintenance plan
Access
What features can be maintained?
What is the whole life cost of the scheme?
Should the EA be tasked with maintenance?
Role of Flood Action Group
Belford:
Of the 48 features, 40 are eligible for
adding to AIMS (the other 8 are LWD
dams)
£2,000 / year
95
Questions?
Thanks to Newcastle University
@AlexNicho1
alex.nicholson@arup.com
12th & 13th September 2016
Rougemont Hotel, Exeter

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The Rivers Trust Autumn Conference: Day 2 - Session 1

  • 1. Chaired by Prof Laurence Smith
  • 3. The case for resilient catchments Improving resilience through collaboration Dr Stephen Bird Managing Director, South West Water 4
  • 4. SOUTH WEST WATER REGION AND RESPONSIBILITIES • Population of 1.7m • 70,000 businesses • Dispersed population • Many tourists – pop. swells to 8m in summer • A unique environment: 35% of England’s designated bathing waters 19% of England’s designated shellfish waters National Parks, ANOBs, SACs, Biosphere Reserve , NIA, etc 5
  • 7. RESILIENCE RECENT DEVELOPMENTS IN THE WATER INDUSTRY (1) Cabinet Office: ‘Keeping the Country Running’ – Natural Hazards and Infrastructure (2) Ofwat: ‘Towards Resilience – How we will Embed Resilience in our Work’ (3) Resilience Task and Finish Group Report (4) Ofwat: ‘Reliable services for customers – consultation on Ofwat’s role on resilience WHY IS IT A HOT TOPIC? WHY IS IT A HOT TOPIC? • Climate change and population growth • Scarcity and affordability concerns • Financial and economic pressures WHAT DOES RESILIENCE MEAN? “Resilience is the ability to cope with, and to recover from, disruption and anticipate trends and variability in order to maintain services for people and protect the natural environment” HOW CAN THE SECTOR EMBED RESILIENCE? • Long-term planning • Innovation • Investing based on whole-life costs and benefits 8
  • 8. THE NATIONAL RESILIENCE POLICY DEBATE • Recognition of the need to change • New duties and focus • Lots of parliamentary reviews post winter 2015 flooding • New ways of working - developing catchment solutions • Ministerial hands on approach- eg Somerset Levels • Much debate over design standards and practices • Should we wait for central policy ? 9
  • 9. CATCHMENT MANAGEMENT COSTS IN THE SW 0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0 Wessex South West Southern Cost per Bill Payer 2015-2021 CAP LA FCERM (capex) FCERM (opex) Insurance Highway Agency Voluntary NVZ Regulation Catchment Partners Local IDBs EA Environment Spend
  • 10. RESILIENCE WHAT SOUTH WEST WATER IS ALREADY DOING WHY IS IT A HOT TOPIC? • ORGANISATIONAL SECURITY Operational innovation Skills development and apprentice programmes • SERVICE & ENVIRONMENTAL PERFORMANCE Upstream and Downstream Thinking WaterShare performance monitoring framework • FINANCIAL VIABILITY Efficient equity and debt finance base Growth opportunities Payment for Eco-system Services (PES) Flood defence funding and support 1 1
  • 11. CATCHMENT RESILIENCE SOUTH WEST WATER CATCHMENT RESILIENCE PLANNING DOWNSTREAM THINKING Multi-agency, multi-benefit approach to sustainable improvements in urban flooding and drainage SuDs, highway drainage, landscaping and active network monitoring & management Pilot approaches, trialling innovative behaviours and techniques UPSTREAM THINKING • Multi-partner, multi-benefit approach to improving raw water quality and natural water storage • 11 catchments in the South West targeted for moorland and agricultural improvements 12
  • 12. Upstream Thinking Flagship environmental project £9m (2010-15) £10m (2015-20) Partnership delivery 2 workstreams: - moorland restoration - agricultural improvements Focus on water quality Improving natural water quality and water storage in the landscape
  • 13. Catchment quality issues and WTWs Pesticides, crypto, colour… N Algae, metaldehyde… Pesticides, algae… Bacteria, crypto, Geosmin Nutrients, pesticides, DO, turbidity… Metaldehyde, colour, crypto
  • 14. Catchment interventions: Cornwall Wildlife Trust (CWT) Devon Wildlife Trust (DWT) Westcountry Rivers Trust (WRT) Exmoor Mires Partnership (EMP) Exmoor National Park (ENPA) Scientific monitoring: University of Exeter Project partners South West Water Catchments River Exe River Dart River Tamar River Fowey Cofton Cross and Otter Fernworthy Barnstaple Yeo Argal & College River Cober Drift Who and where?
  • 15. Film: Upstream Thinking - https://youtu.be/Fb6e_e3f5Cc
  • 16. SWW BENEFITS FROM PARTNERSHIP DELIVERY OF CATCHMENT MANAGEMENT • Match funding from sources SWW cannot access • Extra delivery by the partners in areas that SWW is less able to fund such as biodiversity • Use of a 3rd party for delivery brings greater success - the honest broker approach • Builds partnership support from stakeholders • Customer support and reputational benefits
  • 17. FUTURE SOLUTIONS FOR THE SOUTH WEST • We must reach a common understanding on infrastructure resilience needs & solutions • Need to balance scarce resources to respond to challenges and continue to work in partnership to leverage investment through matched funding opportunities • Need to translate central policy, when it comes, to local actions plans 1 9
  • 18. DEVELOPING A COMMON UNDERSTANDING • Undertake joint research and data analysis • Create a common understanding of the hazards and risks • Working with universities, flood forecasting centre and Met Office to quantify risks and impacts • Work with lead flood authorities, local land drainage boards, Environment Agency, farmers, developers and other utilities – encourage sharing of strategies and action plans 20
  • 20. www.waterlife.org.ukwww.waterlife.org.uk WWF registered charity no.1081247, a company limited by guarantee no. 4016725 WATERLIFE is funded by EC LIFE+. Project number: LIFE13 ENV/UK/000497 Water stewardship: a framework for engaging business in catchment management Lucy Lee Water Stewardship Manager, WWF-UK Rivers Trust Conference 13th September 2016
  • 21. www.waterlife.org.uk Focus of the presentation 1. Why water matters to UK business 2. How water stewardship provides a framework for engaging business in catchment management 3. WWF’s action to date to engage business in catchment management in the UK and plans for supporting increased engagement
  • 22. www.waterlife.org.uk Message 1 - It makes business sense for the corporate businesses to play a long-term role in WFD delivery.1. It makes business sense for the corporate businesses to play a long-term role in WFD delivery. 1.Why water matters to UK business
  • 23. www.waterlife.org.uk Water matters to business • The WEF’s Global Risk Report 2015 ranked “water crises” as the top risk to global growth. • Freshwater species have declined by 76% since 1970. • ½ European rivers and 17% of English rivers meet Good Ecological Status. • The drivers of the economic water risks are the same as those for the decline in freshwater species:  physical water scarcity  poor management of the rivers, lakes and aquifers which supply our water.
  • 24. www.waterlife.org.uk Physical • Flooding • Water scarcity • Water quality Regulatory • 20-30% compliance gap • Changes through Water Act and legislation • Regulatory uncertainty associated with Brexit Reputational • Associated with impacts on communities and ecosystems Opportunity framing can be useful to engage The River Mimram, Hertfordshire during drought Diffuse pollution caused by food and drinks supply chain UK business water risks & opps
  • 25. www.waterlife.org.uk 2. How water stewardship provides a framework for engaging business in catchment management
  • 26. www.waterlife.org.uk Water Awareness Collective Action Influence Governance Internal Action WWF’s Water Stewardship Framework Knowledge of Impact Internal water management Businesses understand their impact and take action to better manage water in their own operations and supply chains Water stewardship Businesses engage beyond their own operations and supply chains
  • 27. www.waterlife.org.uk WS as a framework for engaging business in CM • Water risks are a result of cumulative water use in catchments • Internal water management is therefore not sufficient to manage water risks or maximise opportunities • Businesses need to work collectively with stakeholders in catchments where they have a hotspot of water risk to develop integrated solutions • The catchment management approach provides a perfect framework to enable this and engage business in supporting delivery of the WFD
  • 28. www.waterlife.org.uk 1. We are working in East Anglia, England to demonstrate and test this approach. 3. WWF’s action to date to engage business in catchment management and plans for supporting increased engagement
  • 29. www.waterlife.org.uk Collective action with business – River Nar Aim Deliver environmental improvements through collaborative delivery • Funded by Coca Cola • Addressing reputational risks associated with diffuse pollution in the sugar supply chain • Brought together a range of partners including Norfolk RT, the NFU, NE Actions • Creation of Local WFD Catchment Plan • Engaged farmers to improve over 2000 acres of land • Re-meandering channels
  • 30. www.waterlife.org.uk Collective action – WaterLIFE • Though our WaterLIFE project we are engaging additional businesses in catchment management • Focus on engaging farmers to reduce agricultural pollution • Two catchments  Cam-Ely-Ouse and Broadlands • AIM: scale up the approach and learning from our work in the River Nar and drive broader change in East Anglia
  • 31. www.waterlife.org.uk Supporting increased business engagement in CM We are working with the RT to create a CaBA related work package around water stewardship. • Higher resolution data for England via the Water Risk Filter • Guidance on water stewardship for the food and drink sector in England Its early day so watch this space for more information.
  • 32. www.waterlife.org.uk Influencing governance • Joint action to ensure the right policies and rules are in place to enable the water environment to improve. • Without changes in governance it will be impossible for businesses to mitigate their business risk. • Through our partnership with Coca Cola, we have supported a number of actions:  Government & business WFD roundtable.  Sugar beet workshops  Secretary of State visits  Business to business engagement  Joint activities at party conference  Joint report launches with government – The Chalk Stream report
  • 33. www.waterlife.org.uk In conclusion 1. Water matters to UK businesses 2. Water stewardship provides a framework for engaging business in catchment management 3. WWF is taking action to engage business in catchment management and is developing a toolkit with the RT to support increased engagement
  • 35. Technical Specialist – Environment Agency
  • 36. The condition of soils in our catchments and the impact on the water environment Richard Smith Technical Specialist – Environment Agency
  • 38. The condition of soils in the South West
  • 39. Soil degradation in relation to runoff Severe Moderate High Low
  • 41. % clay Areas surveyed in the South West (2002 to 2011) Hampshire Avon Frome Axe & Otter Tone and Parrett Bristol Avon Creedy & Culm Torridge & Tamar Marazion Bodmin
  • 42. Soil structure degradation in the South West during winter months 0 10 20 30 40 50 60 70 1 (87) 2 (123) 3 (112) 4 (46) 5 (2087) 6 (62) 7 (623) 8 (49) Soil type Percentageoccurrence Severe High Moderate Low Shallow calcareous Deeper calcareous Pelosols Brown podzolic Brown earths Brown sands Stagno- gley Ground- water gley Soil type
  • 43. Soil structure degradation in the South West during winter months 0 10 20 30 40 50 60 70 80 Potatoes (70) Maize (198) Winter cereals (670) Stubble (166) Ley grass (638) Total cultivated (2032) Permanent grass (1154) All sites (3243) Land use Percentageoccurrence Severe High Moderate Low Potatoes (70) Maize (198) Winter cereals (670) Stubble (166) Ley grass (638) Total cultivated (2032) Permanent grass (1154) All sites (3243)
  • 44. 60% runoff from grassland with moderate soil structure 2% runoff from grassland with good soil structure Measuring runoff at Boscastle
  • 49. Summary Soil surveys in the South West have found a widespread problem with soil condition affecting runoff The runoff problem is exacerbated by bad weather and commercial pressures faced by farmers The South West is a high risk area and the environmental impact is serious
  • 50. Reader in Physical Geography, University of Leicester
  • 51. Pesticides in water – challenges and opportunities Mick Whelan
  • 53. Maximum concentrations observed at Grimsbury Cpropyzamide 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 1 2 3 4 5 6 7 8 9 10 11 12 months conc(Average) Cpropyzamide Ccarbetamide 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 1 2 3 4 5 6 7 8 9 10 11 12 months conc(Average) Ccarbetamide Average monthly propyzamide concentrations at Grimsbury Average monthly carbetamide concentrations at Grimsbury CONTEXT: Concentrations of some pesticides periodically challenge DWD compliance
  • 54. Cherwell: Field-scale monitoring Hypothesis: Field drains are a major conduit for herbicide transfer to the Cherwell
  • 56. www.le.ac.uk Herbicide concentrations in drain flow Very rapid, significant transfer to field drain in the first event post application Concentration recession mirrors hydrograph recession Propyzamide losses 1.1% of applied Carbetamide losses 8.6% of applied
  • 57. Metaldehyde Widely used for slug control Aqueous solubility: 222 mg L-1 at 20°C Low KOC: 85 L kg-1 Soil DT50: 4.5 – 73 days No photolysis or hydrolysis Difficult to remove in treatment → “Undertakings” From UKWIR report 2014
  • 58. www.le.ac.uk What to do? • Buffer Zones? • Hard surface management? • Reduce total inputs? • In drain or ditch treatment? • Better soil management? • Operational controls on abstraction?
  • 59. Reduce total inputs? Storage (Soil 1) Rain ETa Drainage Storage (Soil 2) Drainage OLF Rain ETa OLF Qmod Rainfall Drainflow Surface Water Groundwater Recharge Solid phase Liquid phase Air phase Saturated θsat Field Capacity θ5 θ200θ150050% of θ1500 Interactive water Mobile water Pre-event depth of pesticide penetration Pesticide Pesticides subject to: • Linear sorption • First-order degradation θ0 j Mixed land use
  • 60. 0 20 40 60 80 100 120 140 0 0.5 1 1.5 2 2.5 3 Q(m3/s) Conc(ug/L) Date C pest 1 C pest 2 C pest 3 C pest 4 C pest 5 mod Q Modelled exposure from hypothetical application scenario Reduce total inputs? Baseline Scenario: 5 actives applied to different crops at different times
  • 61. 0 20 40 60 80 100 120 140 0 0.5 1 1.5 2 2.5 3 Q(m3/s) Conc(ug/L) Date C pest 1 C pest 2 C pest 3 C pest 4 C pest 5 mod Q Scenario A: Reducing the fraction of managed grassland treated with pesticide 4 from 25% to 12.5% Reduce total inputs? Modelled exposure from hypothetical application scenario
  • 62. Scenario B: Not growing cereals on poorly drained soil (Cereals moved to other soils, grass and some OSR to heavy soil). 0 20 40 60 80 100 120 140 0 0.5 1 1.5 2 2.5 3 Q(m3/s) Conc(ug/L) Date C pest 1 C pest 2 C pest 3 C pest 4 C pest 5 mod Q Change locations for key crops? Modelled exposure from hypothetical application scenario
  • 63. On-line treatment Hope farm in Knapwell (Cambridgeshire) m asl 3.9 km2 catchment
  • 64. 0 50 100 150 200 250 0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Q(L/s) Metaldehydeconc.(ug/L) Metaldehyde (ug/L) Inlet Metaldehyde (ug/L) Outlet Q V-notch (l/s) IN Metaldehyde S. Wetland y = 0.9048x + 0.0692 R² = 0.9043 0.0 2.0 4.0 6.0 8.0 10.0 0.0 2.0 4.0 6.0 8.0 10.0 Conc.OutletSW2(ug/L) Conc. Inlet SW1 (ug/L) Paired t-test for means – no significant difference between concentrations in the inlet and outlet
  • 66. Dynamic model predictions DT50 sed = 122 d DT50 wat = 12.2 d A = 210 m2 z = 0.5 m 0 10 20 30 40 50 60 70 80 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0 100 200 300 400 500 600 700 800 Discharge(L/s) Conc(ng/L) Time (hours) C pred C meas C input Q meas
  • 67. 0 10 20 30 40 50 60 70 80 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000 0 100 200 300 400 500 600 700 800 Discharge(L/s) Conc(ng/L) Time (hours) C meas C input Cpred Q meas DT50 sed = 122 d DT50 wat = 12.2 d A = 2100 m2 z = 1 m Increase area x10 Decrease in peak conc by 36% Reduction in total flux <1% Dynamic model predictions
  • 68. Soil Management Min / no-till now common BUT may require higher applications (e.g. of herbicides) Subsoiling → ↑ transport to drains? ↑ aeration & ↑ degradation? Soil compaction → ↑ OLF More Research Required!
  • 69. Conclusions: Challenges (some) • Concentrations of some pesticide active ingredients occasionally challenge DWD compliance • Problems particularly acute for compounds with low treatment removal efficiency (e.g. metaldehyde) • Field drains represent significant pathways in heavy soils → limited benefits from farmyard management + buffer zones • Issues arise from multiple actors – need to get a critical mass on board to achieve objectives • DWD standards are absolute but effectiveness of catchment management is subject to variability
  • 70. Conclusions: Opportunities (some) • Potential benefits for crop rotation changes involving reduced total usage and changes in application timings • On line treatment wetlands (probably) of limited value for catchment protection (need high wetland : catchment area) • Better understanding of catchment dynamics could help to target interventions (e.g. on vulnerable soils) and inform operational controls (e.g. on abstraction) • Soil management may offer (currently unknown) benefits – more research needed!
  • 72. 74 Current understanding of NFM and where we go from here Alexander Nicholson @AlexNicho1
  • 73. 75 Natural flood management (NFM) is the alteration, restoration or use of landscape features to reduce flood risk (POST, 2011). What is Natural Flood Management? POST. (2011). Natural Flood Management POSTNOTE 396. London, UK: Parliamentary Offices of Science and Technology. Retrieved from http://www.parliament.uk/briefing-papers/POST-PN-396 SLOW STORE FILTER
  • 74. 76 Benefits of NFM • Reduction of peak flow at downstream receptors • Reduced erosion (on land and in waterbodies) • Reduced sediment delivery (capturing at source) • Improved water quality (reduced costs to water companies) • Habitat creation (terrestrial and aquatic) • Drought reduction (and agricultural enhancement)?
  • 76. Holnicote © National Trust © Penny Anderson Associates © National Trust
  • 79. 81 PhD findings 𝑑𝑉 𝑑𝑡 = 𝑄𝑖𝑛 − 𝑄 𝑜𝑢𝑡 𝑄 𝑑𝑠 = 𝑄 𝑢𝑠 − 𝑑𝑉 𝑑𝑡 Analytical method: Monitored evidence: Filling Full Emptying 10% reduction in flow from one pond! Though – this was not the design event.
  • 80. 82 Modelling method: Modelled results: PhD findings 𝐼 = ቐ 0 𝑖𝑓 𝑧 𝑠1 ≤ 𝑧 𝑠𝑤 𝑓𝑟 𝐶 𝑑 2 3 𝑏 2𝑔 𝑧𝑠1 − 𝑧 𝑠𝑤 1.5 𝑖𝑓 𝑧 𝑠1 > 𝑧 𝑠𝑤 𝑓𝑟 = 1.0 𝑖𝑓 𝑧 𝑠2 ≤ 𝑧 𝑠𝑤 1 − 𝑧 𝑠2 − 𝑧 𝑠𝑤 𝑧 𝑠1 − 𝑧 𝑠𝑤 1.5 0.385 𝑖𝑓 𝑧 𝑠2 > 𝑧 𝑠𝑤
  • 81. 83 • Water storage capacity ≈ 280 m3 • 70 ha contributing area Multi-benefits (sediment and water quality)
  • 82. 84 0 2 15min rain(mm) 0.0 5.0 10.0 Flumestage (cm) 0 0.2 0.4 TPconc.(mgl-1) TP in TP out 0 100 200 300 SSconc.(mgl-1) SS in SS out 0 2 4 6 8 NO3conc.(mgl-1) NO3 in NO3 out Retention (% concentration) • SS: 25 – 67 (49% net retention) • TP: 16 – 44 (33% net retention) • NO3: 5 – 85 (18% net retention) ~ £2000 of work
  • 83. 85 Other initiatives • Cumbria Floods Partnership (and action plan) • Working with Natural Processes (and opportunity mapping) • Defra model competition • NERC Research Call (up to £6M)
  • 88. • How might the sub-catchments be interacting? • How can this sort of analysis help with NFM and catchment management? Flow contribution Q (m3/s) t (hrs) Combined flow downstream Thanks to Gareth Owen and Paul Quinn
  • 90. 92 Estimating storage requirements and costs 1km 1km How much storage is needed? (Based on the Belford Study and other research) Need approx. 2,000m3 / km2 If storage areas only fill up to 25cm, the area of land take will be 8,000m2, which equates to 1% of the land* Conservative costs: £10 / m3 This means to deliver an NFM scheme for: 10km2 Catchment = £200,000 100km2 Catchment = £2,000,000 * Paul Quinn’s 5% future. Let’s also remember that these features only take up this area when full of water
  • 91. 93 Benefits and funding FDGiA OM1 – Damages avoided OM2 – Moving risk bands (Low, Medium, High) OM4a – Water dependent habitat Partnership funding Natural England Forestry Commission How many properties are you potentially benefiting? Multiple locations and further downstream
  • 92. 94 Maintenance AIMS Asset description Maintenance plan Access What features can be maintained? What is the whole life cost of the scheme? Should the EA be tasked with maintenance? Role of Flood Action Group Belford: Of the 48 features, 40 are eligible for adding to AIMS (the other 8 are LWD dams) £2,000 / year
  • 93. 95 Questions? Thanks to Newcastle University @AlexNicho1 alex.nicholson@arup.com
  • 94. 12th & 13th September 2016 Rougemont Hotel, Exeter