Appendices

190 Pages·2013·3.62 MB·English

WRMP Options Appraisal Report

Appendices

Appendix A - Reports
Appendix B – Unconstrained Options
Appendix C – Water resources planning studies
Appendix D – Carbon costs
Appendix E – Benefits Assessment (BAG) Report
Appendix F – Willingness to Pay Report
Appendix G – Climate Change Assessment Report
Appendix H – Water Framework Directive No Deterioration Report
Appendix I – EBSD Optimisation Model Report
Appendix J – Preferred plan options set
Appendix K – Scenario Testing Results
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WRMP Options Appraisal Report

Appendix A – Reports
Options Appraisal Report
Appendix A
Reports

The following reports are referred to within the options appraisal report:

• Review of Water Resource Zone Integrity, Final Report, Anglian Water, 19
February 2013

• MISER Product Information Report, May 2013

• Economics of Balancing Supply and Demand Optimisation Model Report,
University College London, April 2013

• Economics of Leakage Control for PR14, TMC, April 2013

• Draft 2014 Water Resource Management Plan indicative view of baseline
forecast, Anglian Water, October 2012.

• Strategic Environmental Assessment Scoping report, October 2012

• Strategic Environmental Assessment, Volume I: Main report, December 2013

• Strategic Environmental Assessment, Volume II: Appendices, May 2013

• Habitats Regulations Assessment, December 2013

• Costessey Surface Water Licence Sustainability Reduction Project Report,
Anglian Water, April 2012.

• British Waterways Transfer to Pitsford Reservoir, Water Resources
Assessment, AW Water Resources Team, July 2012’

• Anglian Water PR14 Willingness to Pay Survey: Final Report (eftec and ICS
consulting, November 2012)

• Anglian Water PR14 Second Stage Water Resources: Final Report (eftec and
ICS consulting, May 2013)

• Anglian Water PR14 Customer Research: Completion Report (eftec and ICS
consulting, May 2013)
WRMP Options Appraisal Report

Appendix B – Unconstrained Options
Options Appraisal Report
Appendix B.1 Unconstrained Options - Fenland
Appendix B - Unconstrained options
Unconstrained Options - Supply Side Options
RZ Fenland Note: Table also includes unconstrained options for Hunstanton RZ
Date 20 March 2013
Screening Criteria
h a
Scheme Type CaSCtceohgmeopmroieen seS/nuStbus-b - Option Ref Option Description Risks & Constraints UnRceoanssotnra Ninoetd I nOcplutidoends iLnis t Does opt. address the problem? oes opt. breacunalterable planning constraints? Is the opt. promotable? oes opt. have high risk of failure Reason for Discounting Option OFpeatisoinb lies ReRfeepreonrtc e
D D
Direct river abstraction River Wissey / Cut off Channel (WTW extension) x CAMS - Cut off Channel subject to WFD no N
deterioration.
River Heach Subject to CAMS x CAMS resource availability - no water available, N T6a
therefore this option does not address the
problem
River Ingol Subject to CAMS x CAMS resource availability - water available at N T6a
higher river flows. The published CAMS documents
have been used to identify potential areas of river
abstraction based on the existing water resource
availability. However, the CAMS documents that
were used in this review are, in several cases,
considered out-dated since a republication is due
within the next year. For the River Ingol where the
preliminary low flow resource availability status of
the river reach is ‘water available’ it is overridden
to ‘no water available’ in order to indicate that
additional abstraction will only be allowed where it
does not make the position within the critical unit
any worse. Therefore there is a high risk that the
option would fail before implementation
North Norfolk Rivers Subject to CAMS x CAMS resource availability - no water available, N T6a
therefore this option does not address the
problem
Gaywood River Subject to CAMS x CAMS resource availability - no water N T6a
available/over-licensed , therefore this option does
not address the problem
New reservoir storage On-stream reservoirs None There are no suitable valleys for an
impounding reservoir
Pumped-storage reservoirs Feltwell (Trent-Rutland-Ouse transfer) A feasible option but not taken through to Stage 2 Y T1d
as would need to be developed as part of long
term strategy To be considered in the WREA
North Norfolk Rivers (winter storage) Yield, location, timing of delivery x Within the North Norfolk AONB. Low flows and N T1e
likely high HOF suggest that scheme would have
minimum yield. Therefore there is a high risk that
the option would fail before implementation.
Wash Reservoirs Yield, location, timing of delivery x Due to the environmental sensitivity of the Wash N T1d
there is a high risk of failure. This option could be
considered in the WREA
Flood storage Wash Barrage Yield, timing of delivery x Due to the environmental sensitivity of the Wash N T10c
there is a high risk of failure.
New IDB structure Yield, location, timing of delivery x x Uncertainty of reliability, quantity and quality of N T10a
resource. Therefore high risk of failure and
solution not addressing the problem. To be
considered in the WREA
SUDS - recharge lagoons Yield, location, timing of delivery x x Uncertainty of reliability, quantity and quality of N T10b
resource. Therefore high risk of failure and
solution not addressing the problem
Reservoir raising None There are no reservoirs to raise
Groundwater sources Sandringham Sands Subject to CAMS x CAMS Review - no water available (Heach). Water N T6b
available (Ingol) but "Economic gains from the
relatively small quantities of water which might be
available, are outweighed by the environmental
risks to a small river which is highly dependent on
the underlying Chalk strata”. Therefore there is a
high risk of failure that the option would fail before
implementation.
Nitrate removal/revised blending regime x No WTW output constrained by blending scheme. N T4e
Therefore this option does not address the
problem
H4 Hunstanton groundwater development Y T4c
Infiltration galleries None No suitable sites
Artificial Storage and Recovery Sandringham Sands x x ASR scheme has been discounted due to risk of N T8a
wells (or ‘Aquifer Storage and clogging due to fine sands, risk of changes in
Recharge’) (ASR) water quality, potential for recharge water loss and
distance to the potential recharge source.
Options Appraisal Report
Appendix B.1 Unconstrained Options - Fenland
Aquifer Recharge (AR) North Norfolk Rivers (central Norfolk) x CAMS5 states no available surface water. N T8c
Recharge to the coastal Crag and the Chalk using
treated effluent could be possible, but would
require a site by site assessment to determine if
there is sufficient head room and permeability.
However the discharged effluent must be of
sufficient quality to protect groundwater quality,
and such discharges would be subject to an
Environmental Permit (NEP) and risk assessment.
Will be considered further in WREA.
Desalination H3 Hunstanton (Wash) Desal Location Y T11b
F2 Kings Lynn Desal Location Y T11b
Reclaimed water Reclaimed domestic F1 Kings Lynn Effluent Reuse Y T3a
wastewater F1 West Walton WRC Reuse Y T3a
H2 Heacham WRC Y T3b
Reclaimed industrial and Industrial reclaimed water Resource availability, yield, WQ, Unproven - subject to significant uncertainty in N
commercial wastewater (for availability to trade terms of impact on river flows, water quality, WFD
domestic, commercial and and availability of trading options
industrial users)
Bulk transfers (including changes By canal None No canals in area
to existing transfers, and
transfers from sources both inside
and outside the company’s own
supply area)
By river
By pipeline H1 Fenland PZ transfer to Hunstanton Y T2
North Norfolk Coast RZ transfer x Not adequate surplus to transfer N T2
Wash Pipeline from Lincolnshire Resource availability in Lincolnshire x Due to the environmental sensitivity of the Wash N T2
there is a high risk of failure. This option could be
considered in the WREA
F3 NW Norfolk transfer x Not adequate surplus to transfer from North N T2
Norfolk Coast WRZ
F4 and F5 Transfer from Ruthamford WRZ Resource availability in Ruthamford Y T2
Resource Sharing with other Trade None No adjacent water companies
Water Companies
Shared asset ownership None No adjacent water companies
3rd Party Options Trade 3rd party trade options Resource availability, yield, WQ, Unproven - subject to significant uncertainty in N
availability to trade terms of impact on river flows, water quality, WFD
and availability of trading options
Shared asset ownership Multi use reservoir (agriculture) Resource availability, yield, WQ Concerns over resilience in a drought and control N T13
over raw water quality. To be considered in WREA
and the Defra Wissey pilot study.
Tankering of water H5 Hunstanton tankering (road) x x Due to the high numbers of tanker deliveries per N T15
day down narrow country roads will be difficult to
justify given the potential for disruption of local
traffic. High WQ risks. Therefore the option is
considered not promotable with a high risk of
failure before implementation
Kings Lynn tankering (sea) Subject to ongoing evaluation. N
Icebergs x Unproven - subject to significant risk N
Improved/sophisticated Kings Lynn conjunctive use Subject to ongoing evaluation and RSA risk. N
conjunctive management
Other
Options Appraisal Report
Appendix B.2 Unconstrained Options - Norwich and the Broads
Appendix B - Unconstrained options
Unconstrained Options - Supply Side Options
RZ Norwich & the Broads
Date 20 March 2013
Screening Criteria
Scheme Type CaSCtceohgmeopmroieen seS/nuStbus-b - Option Ref Option Description Risks & Constraints UnRceoanssotnra Ninoetd I nOcplutidoends iLnis t Does opt. address the problem? Does opt. breach unalterable Is the opt. promotable? Does opt. have a high risk of failure Reason for Discounting Option OFpeatisoinb lies WRR Teafeskre Rnecpeort
Direct river abstraction NB6, NB7, NB10 River Wensum Subject to CAMS/SR Y T17
River Yare Subject to CAMS x CAMS resource availability - N T6a
overlicenced. Therefore this option
does not address the problem
River Tas Subject to CAMS x CAMS resource availability - over N T6a
abstracted. Therefore this option
does not address the problem
New reservoir storage On-stream reservoirs NB7 Existing storage pits development (lining pits) Conclusion of hydraulic connectivity study Y T1d
Gravel Pit development Yield, timing of delivery x Development of the gravel pits do N T1e
not provide sufficient storage
capacity and are not feasible on
environmental regulatory grounds
Pumped-storage reservoirs NB5 and NB8 New Wensum Reservoir Timing of delivery Y T1d
Feltwell winter storage reservoir + transfer Resource availability, timing of delivery x A feasible option but not taken Y T1d
through to Stage 2 as the scheme
could not be implemented in time to
meet deficit created by sustainability
reduction on Wensum. Would need
to be developed as part of long term
strategy and should be considered in
the WREA.
Flood storage SUDS Yield, location and timing of delivery x Uncertainty of reliability, quantity N T10b
and quality of resource. Therefore
high risk of failure and solution not
addressing the problem
Reservoir raising None There are no reservoirs to raise
Groundwater wells NB9 Norwich groundwater development Solution included in the baseline N Alliance
Ringland perched ponds Unproven - subject to ongoing N
evaluation.
Infiltration galleries Wensum gravels Yield, licence x Low Potential - Loss of water from N T8b
river is likely. Unmanageable WQ risk
Artificial Storage and Recovery None No suitable sites
wells (or ‘Aquifer Storage and
Recharge’) (ASR)
Aquifer Recharge (AR) Flood water management Yield, licence x It is considered potentially feasible to N T8c
site a SuDS scheme in north and
north-west Norwich . Local Site
Investigations will be required due to
the variable ground conditions.
However there is uncertainty of
reliability and quality of resource.

Desalination NB1 Bacton Y T11a
NB3 Cantley Reuse (brackish river water or groundwater) Yield, WQ x Discounted based on SEA N T11b
Reclaimed water Reclaimed domestic NB2 Norwich water reuse Y T3a
wastewater NB4 Lowestoft/Great Yarmouth Reuse Yield and location in relation to deficit x Discounted based on SEA N T3b
Reclaimed industrial and Review discharge consents Unproven - subject to significant N T5a
commercial wastewater (for uncertainty in terms of impact on
domestic, commercial and river flows, water quality, WFD and
industrial users) availability of trading options
Sizewell Location, public perception x Return seawater used for cooling N T7
could be suitable as a raw water
source. However initial comparison
between the RO plant detailed in
Task 11 and treatment of the higher
temperature seawater indicate that
there maybe savings of around 5%
OPEX but CAPEX would be the same
magnitude and the operational risks
are much higher. Therefore this
option has been discounted.
Bulk transfers (including changes By canal None No canals in the area
to existing transfers, and
Options Appraisal Report
Appendix B.2 Unconstrained Options - Norwich and the Broads

g ,
transfers from sources both inside
and outside the company’s own
supply area)
By river Ouse - Wensum transfer (with Feltwell reservoir) A feasible option but not taken Y T2/T1d
through to Stage 2 as the scheme
could not be implemented in time to
meet deficit created by sustainability
reduction on Wensum. Would need
to be developed as part of long term
strategy and should be considered in
the WREA.
By pipeline Fenland RZ transfer x Not adequate surplus to satisfy deficit N T2
in Norwich and the Broads WRZ
Ruthamford North RZ transfer x Not adequate surplus to satisfy deficit N T2
in Norwich and the Broads WRZ
West Suffolk RZ transfer x Not adequate surplus to satisfy deficit N T2
in Norwich and the Broads WRZ
Essex and Suffolk Water transfer No trading options N T2
x
Resource Sharing with other Trade Essex and Suffolk Water transfer from the Broads x No trading options N T2
Water Companies Cambridge Water x Options been maximised for CWS RZ N T2
no further trading options
Shared asset ownership Sizewell (with ESW) Location, public perception x Option discounted on basis increased N T7/T13
risk and costs compared to traditional
desalination
3rd Party Options Trade 3rd party trade options Yield, reliability, WQ and timing of Subject to ongoing evaluation. N T5a/b
delivery
Shared asset ownership Agricultural reservoirs Resource availability, yield, WQ Concerns over resilience in a drought N T13
and control over raw water quality.
To be considered in WREA
Tankering of water No Quantities too high for tankering to be
feasible
Improved/sophisticated
conjunctive management
Other
Options Appraisal Report
Appendix B.3 Unconstrained Options - East Suffolk and Essex
Appendix B - Unconstrained options
Unconstrained Options - Supply Side Options
RZ East Suffolk & Essex
Date 20 March 2013
Screening Criteria
Scheme Type CaSCtceohgmeopmroieen sSe/nuStbus-b - OpRteiofn Option Description Risks & Constraints UnRceoanssotnra Ninoetd I nOcplutidoends iLnis t Does opt. address the problem? Does opt. breach unalterable planning constraints? Is the opt. promotable? Does opt. have a high risk of failure OFpeatisoinb lies Reason for Discounting Option Information Required Task Owners
Direct river abstraction Existing intake pumps and licence maximisation x N Intake to Alton water currently Resource assessment T1b/T6a
operating at maximum licence
conditions, WFD no-deterioration
Mill River - licence maximisation x N Sustainability reduction imposed Resource assessment T6
resulting in no additional water
available
River Stour - trade with Essex and Suffolk Water x N No trade options available with Essex Resource assessment T6/14
and Suffolk Water
River Colne x N CAMS resource availability for the Resource assessment T1d/T6a
Lower Colne - overlicenced.
Therefore this option does not
address the problem
River Fynn/River Deben Subject to CAMS - licence issues x N Unproven - unlikely to be suitable for Resource assessment T6a
public water supply
River Blackwater Subject to CAMS x N CAMS resource availability for the Resource assessment T6a
River Blackwater - overlicenced.
Therefore this option does not
address the problem
New reservoir storage On-stream reservoirs Great Bradley Yield, timing of delivery Y A feasible option but not taken Resource assessment T1d
through to Stage 2 as would need to
be developed as part of long term
strategy and should be considered in
the WREA
Reservoir dredging x N Increasing storage at Alton is not a Resource assessment T1c
viable method of increasing
hydrological yield, under current
licence conditions
Pumped-storage reservoirs Feltwell reservoir + transfers to Essex and Suffolk WRZ Y A feasible option but not taken Review previous study T1d
through to Stage 2 as would need to
be developed as part of long term
strategy and should be considered in
the WREA
SE7 Ardleigh extension (see shared asset ownership below) Y Review previous study T1d
Flood storage SUDS Yield, location and timing of delivery x N Uncertainty of reliability and quality Resource assessment T10b
of resource. Therefore high risk of
failure and solution not addressing
the problem. To be considered in the
WREA
Reservoir raising Alton Water x N Increasing storage at Alton is not a Resource assessment T1c
viable method of increasing
hydrological yield, under current
licence conditions
Ardleigh Reservoir x N Increasing storage at Ardleigh is not a Resource assessment T1c
viable method of increasing
hydrological yield, under current
licence conditions
Groundwater sources Gravel Pit exploitation Yield, WQ, location and timing x N CAMS resource availability for the Resource assessment T6b
River Gipping - overlicenced. There
are WQ risks with this option.
Therefore this option does not
address the problem
Baylham x N CAMS resource availability for the Resource assessment T6b
River Gipping - overlicenced. There
are WQ issues with this option.
Therefore this option does not
address the problem
North Ipswich groundwater x N CAMS resource availability for the Resource assessment T6b
confined chalk - over abstracted.
Therefore this option does not
address the problem
Bartlow/Bures x N CAMS resource availability for the Resource assessment T6b
confined chalk - over abstracted.
Therefore this option does not
address the problem
SE6 South essex RZ groundwater development Y Resource assessment T4c
ES6 Ipswich groundwater development Y Resource assessment T4c
ES7 Belstead Brook Chalk groundwater development x N Option discounted on further review Resource assessment T6b
of CAMS
Treat high fluoride groundwater source x N WTW output from high fluoride Resource assessment T4e
sources are constrained by licence
and not poor quality water and WTW
capacity
Infiltration galleries Ipswich Yield, WQ, licence and location x N No Potential - There is no source of Resource assessment T8b
recharge for this scheme here. The
river is tidally influenced and
therefore not suitable due to the
salinity content
Braintree Yield, WQ, licence and location x N Low Potential - Loss of water to river Resource assessment T8b
is likely, and the gravel outcrop
coincides with the flood plain so
would increase local flood risk and
WQ risks. Localised outcrops will not
Woodbridge Yield, WQ, licence and location x N No Piodte ntiaffli -i Thte rte is no source of Resource assessment T8b
recharge for this scheme here. The
river is tidally influenced and
therefore not suitable due to the
salinity content
Halstead Yield, WQ, licence and location x N No Potential - Loss of water to river is Resource assessment T8b
likely. Already a water quality issue
within area due to Safeguard Zone
Artificial Storage and Recovery Mill River Licence x N Option does not provide additional DO Review previous study T8a
wells (or ‘Aquifer Storage and and has therefore been discounted as
Recharge’) (ASR) part of WRMP. Limited availability of
injection water.
Options Appraisal Report
Appendix B.3 Unconstrained Options - East Suffolk and Essex

SE3 South Essex RZ ASR Yield, WQ, licence and location x N Option does not provide additional DO Resource assessment T8a
and has therefore been discounted as
part of WRMP
Aquifer Recharge (AR) SUDS Yield, WQ, licence and location x N Uncertainty of reliability, quantity and Resource assessment T8c
quality of resource. Therefore high
risk of failure and solution not
addressing the problem. To be
considered in the WREA
Desalination ES4 Felixstowe Y Review previous study T11a
Reclaimed water Reclaimed domestic ES3 Ipswich Water Reuse Y Review previous study T3a
wastewater SE1 Colchester Water Reuse Y Review previous study T3a
Tilbury/Chelmsford (trades) Yield, location N Unproven - subject to significant Resource assessment T3b
uncertainty in terms of impact on
river flows, water quality, WFD and
availability of trading options
Reclaimed industrial and Colchester/Ipswich industrial study (discharge consents) N Unproven - subject to significant Review trade eff discharge T5a
commercial wastewater (for uncertainty in terms of impact on
domestic, commercial and river flows, water quality, WFD and
industrial users) availability of trading options
Sizewell Location, public perception x N Return seawater used for cooling Review previous study T7
could be suitable as a raw water
source. However initial comparison
between the RO plant detailed in Task
11 and treatment of the higher
temperature seawater indicate that
there maybe savings of around 5%
OPEX but CAPEX would be the same
magnitude and the operational risks
are much higher. Therefore this
option has been discounted.
Bulk transfers (including changes By canal None No canals
to existing transfers, and
transfers from sources both inside
and outside the company’s own
supply area)
By river EOETs optimisation (+ trade with Essex and Suffolk Water) x N No trade options available with Essex T2
and Suffolk Water
By pipeline SE2, South Essex RZ to East Suffolk RZ Y T2
SE8,
ES10
ES1 Transfer from Ipswich PZ to Woodbridge PZ Y Included in baseline
ES5 Transfer WTW to Semer PZ or Ipswich PZ N Subject to on-going evaluation
Resource Sharing with other Trade SE4 Affinity East (Ardleigh agreement) Y Discuss with Affinity T14
Water Companies Affinity Central x N No water to trade Discuss with Affinity T14
ES8, ES9Essex and Suffolk Water x N No water to trade Discuss with ESW T14
Thames Water x N No water to trade Discus with Thames
Shared asset ownership Sizewell Location, public perception x N Return seawater used for cooling Discuss with ESW T7
could be suitable as a raw water
source. However initial comparison
between the RO plant detailed in Task
11 and treatment of the higher
temperature seawater indicate that
there maybe savings of around 5%
OPEX but CAPEX would be the same
magnitude and the operational risks
are much higher. Therefore this
option has been discounted.
EOETs extension N Only feasible if combined with storage Discuss with ESW T14
reservoir (Feltwell). Would need to
be developed as part of long term
strategy and should be considered in
the WREA
Ardleigh upgrade - gravel pit extension Y A feasible option but not taken Discuss with Veolia T14
through to Stage 2 as would need to
be developed as part of long term
strategy and should be considered in
the WREA
3rd Party Options Trade 3rd party trade options ? Subject to ongoing evaluation. Review trade effluent discharge T5b
Trade high fluoride water x N WTW output from high fluoride Resource assessment T4e/T5b
sources are constrained by licence
and not poor quality water and WTW
capacity. Therefore no water to trade
Shared asset ownership None identified
Tankering of water CE3 Tankering (Road) Location of source x x N Due to the high numbers of tanker Identify source and route T15
deliveries per day down narrow
country roads will be difficult to
justify given the potential for
disruption of local traffic. High WQ
risks. Therefore the option is
considered not promotable with a
high risk of failure before
Icebergs x N Unproven - subject to significant risk
Tankering (sea) N Subject to ongoing evaluation.
Improved/sophisticated Colchester Chalk (optimise use of surface water resources and back off N Subject to ongoing evaluation and Resource assessment T12
conjunctive management Colchester Chalk) RSA risk.
Other SE5 Refurbish Ardleigh WTW to maximise DO Y Included in the baseline forecast,
capital maintenance scheme