Guidance

HS2 Phase One environmental statement volume 5: water resources

Published 25 November 2013

These documents have been published as part of the HS2 Phase One environmental statement for the route between London and the West Midlands. The environmental statement was produced to accompany the HS2 Phase One hybrid Bill.

This appendix includes:

• preliminary calculations carried out for the rivers to support the hydraulic modelling reports
• groundwater modelling carried out to assess the impact of tunnel portals
• hydraulic modelling carried out to support the flood risk assessment
• descriptions of existing flood risks and water resources and details of how Phase One of HS2 will affect these and explanations of how adverse effects will be mitigated
• details of the route-wide assessment of effects on surface water and groundwater resources
• maps showing the existing surface water and groundwater features

Data reports

Route-wide water resources report:

• Routewide appendix (Ref: volume 5 appendix WR-001-000, ES 3.5.0.14) (PDF, 15.7MB)

The remaining water resource reports are specific to individual community forum areas (CFAs). A map depicting each CFA along the route is available in the Introduction to the environmental statement.

Euston Station and approach: CFA 01

• CFA 01 water resources assessment report: Euston Station and approach (Ref: volume 5 appendix WR-002-001, ES 3.5.2.1.12) (PDF, 1.2MB)
• CFA 01 flood risk assessment report: Euston Station and approach (Ref: volume 5 appendix WR-003-001, ES 3.5.2.1.13) (PDF, 1.3MB)

Camden Town and HS1 link: CFA 02

• CFA 02 water resources assessment report: Camden Town and HS1 link (Ref: volume 5 appendix WR-002-002, ES 3.5.2.2.12) (PDF, 1.2MB)
• CFA 02 flood risk assessment report: Camden Town and HS1 link (Ref: volume 5 appendix WR-003-002, ES 3.5.2.2.13) (PDF, 1.3MB)

Primrose Hill to Kilburn (Camden): CFA 03

• CFA 03 water resources assessment report: Primrose Hill to Kilburn (Camden) (Ref: volume 5 appendix WR-002-003, ES 3.5.2.3.12) (PDF, 1MB)
• CFA 03 flood risk assessment report: Primrose Hill to Kilburn (Camden) (Ref: volume 5 appendix WR-003-003, ES 3.5.2.3.13) (PDF, 1.1MB)

Kilburn (Brent) to Old Oak Common: CFA 04

• CFA 04 water resources assessment report: Kilburn (Brent) to Old Oak Common (Ref: volume 5 appendix WR-002-004, ES 3.5.2.4.12) (PDF, 1.1MB)
• CFA 04 flood risk assessment report: Kilburn (Brent) to Old Oak Common (Ref: volume 5 appendix WR-003-004, ES 3.5.2.4.13) (PDF, 1.4MB)
• Old Oak Common breach analysis modelling report (Ref: volume 5 appendix WR-004-001, ES 3.5.2.4.14) (PDF, 1.5MB)

Northolt Corridor: CFA 05

• CFA 05 water resources assessment report: Northolt Corridor (Ref: volume 5 appendix WR-002-005, ES 3.5.2.5.12)(PDF, 1.5MB)
• CFA 05 flood risk assessment report: Northolt Corridor (Ref: volume 5 appendix WR-003-005, ES 3.5.2.5.13) (PDF, 1.5MB)

South Ruislip to Ickenham: CFA 06

• CFA 06 water resources assessment report: South Ruislip to Ickenham (Ref: volume 5 appendix WR-002-006, ES 3.5.2.6.13) (PDF, 1MB)
• CFA 06 flood risk assessment report: South Ruislip to Ickenham (Ref: volume 5 appendix WR-003-006, ES 3.5.2.6.14) (PDF, 1.7MB)

Colne Valley: CFA 07

• CFA 07 water resources assessment report: Colne Valley (Ref: volume 5 appendix WR-002-007, ES 3.5.2.7.14) (PDF, 2.7MB)
• CFA 07 flood risk assessment report: Colne Valley (Ref: volume 5 appendix WR-003-007, ES 3.5.2.7.15) (PDF, 1MB)

The Chalfonts and Amersham: CFA 08

• CFA 08 water resources assessment report: The Chalfonts and Amersham (Ref: volume 5 appendix WR-002-008, ES 3.5.2.8.13) (PDF, 2.6MB)
• CFA 08 flood risk assessment report: The Chalfonts and Amersham (Ref: volume 5 appendix WR-003-008, ES 3.5.2.8.14) (PDF, 1.1MB)

Central Chilterns: CFA 09

• CFA 09 water resources assessment report: Central Chilterns (Ref: volume 5 appendix WR-002-009, ES 3.5.2.9.14) (PDF, 1.3MB)
• CFA 09 flood risk assessment report: Central Chilterns (Ref: volume 5 appendix WR-003-009, ES 3.5.2.9.15) (PDF, 823KB)

Dunsmore, Wendover and Halton: CFA 10

• CFA 10 water resources assessment report: Dunsmore, Wendover and Halton (Ref: volume 5 appendix WR-002-010, ES 3.5.2.10.13) (PDF, 2.2MB)
• CFA 10 flood risk assessment report: Dunsmore, Wendover and Halton (Ref: volume 5 appendix WR-003-010, ES 3.5.2.10.14) (PDF, 1MB)

Stoke Mandeville and Aylesbury: CFA 11

• CFA 11 water resources assessment report: Stoke Mandeville and Aylesbury (Ref: volume 5 appendix WR-002-011, ES 3.5.2.11.14) (PDF, 1.6MB)
• CFA 11 flood risk assessment report: Stoke Mandeville and Aylesbury (Ref: volume 5 appendix WR-003-011, ES 3.5.2.11.15) (PDF, 1MB)
• Stoke Brook modelling report (Ref: volume 5 appendix WR-004-003, ES 3.5.2.11.16) (PDF, 2.4MB)

Waddesdon and Quainton: CFA 12

• CFA 12 water resources assessment report: Waddesdon and Quainton (Ref: volume 5 appendix WR-002-012, ES 3.5.2.12.13) (PDF, 710KB)
• CFA 12 flood risk assessment report: Waddesdon and Quainton (Ref: volume 5 appendix WR-003-012, ES 3.5.2.12.14) (PDF, 860KB)

Calvert, Steeple Claydon, Twyford and Chetwode: CFA 13

• CFA 13 water resources assessment report: Calvert, Steeple Claydon, Twyford and Chetwode (Ref: volume 5 appendix WR-002-013, ES 3.5.2.13.13) (PDF, 2.6MB)
• CFA 13 flood risk assessment report: Calvert, Steeple Claydon, Twyford and Chetwode (Ref: volume 5 appendix WR-003-013, ES 3.5.2.13.14) (PDF, 987KB)
• Padbury Brook modelling report (Ref: volume 5 appendix WR-004-004, ES 3.5.2.13.15) (PDF, 1.8MB)

Newton Purcell to Brackley: CFA 14

• CFA 14 water resources assessment report: Newton Purcell to Brackley (Ref: volume 5 appendix WR-002-014, ES 3.5.2.14.13) (PDF, 2.8MB)
• CFA 14 flood risk assessment report: Newton Purcell to Brackley (Ref: volume 5 appendix WR-003-014, ES 3.5.2.14.14) (PDF, 960KB)
• Great Ouse at Turweston modelling report (Ref: volume 5 appendix WR-004-005, ES 3.5.2.14.15) (PDF, 807KB)

Greatworth to Lower Boddington: CFA 15

• CFA 15 water resources assessment report: Greatworth to Lower Boddington (Ref: volume 5 appendix WR-002-015, ES 3.5.2.15.13) (PDF, 4.1MB)
• CFA 15 flood risk assessment report: Greatworth to Lower Boddington (Ref: volume 5 appendix WR-003-015, ES 3.5.2.15.14) (PDF, 900KB)
• Culworth Brook at Lower Thorpe modelling report (Ref: volume 5 appendix WR-004-006, ES 3.5.2.15.15) (PDF, 2MB)
• Highfurlong Brook modelling report (Ref: volume 5 appendix WR-004-008, ES 3.5.2.15.16) (PDF, 814KB)
• River Cherwell at Edgcote modelling report (Ref: volume 5 appendix WR-004-007, ES 3.5.2.15.17) (PDF, 1.4MB)

Ladbroke and Southam: CFA 16

• CFA 16 water resources assessment report: Ladbroke and Southam (Ref: volume 5 appendix WR-002-016, ES 3.5.2.16.14) (PDF, 1.4MB)
• CFA 16 flood risk assessment report: Ladbroke and Southam (Ref: volume 5 appendix WR-003-016, ES 3.5.2.16.15) (PDF, 1.4MB)
• Ladbroke to Southam river modelling report (Ref: volume 5 appendix WR-004-009, ES 3.5.2.16.16) (PDF, 3.8MB)

Offchurch and Cubbington: CFA 17

• CFA 17 water resources assessment report: Offchurch and Cubbington (Ref: volume 5 appendix WR-002-017, ES 3.5.2.17.13) (PDF, 675KB)
• CFA 17 flood risk assessment report: Offchurch and Cubbington (Ref: volume 5 appendix WR-003-017, ES 3.5.2.17.14) (PDF, 1.5MB)
• Offchurch to Cubbington river modelling report (Ref: volume 5 appendix WR-004-010, ES 3.5.2.17.15) (PDF, 2.2MB)

Stoneleigh, Kenilworth and Burton Green: CFA 18

• CFA 18 water resources assessment report: Stoneleigh, Kenilworth and Burton Green (Ref: volume 5 appendix WR-002-018, ES 3.5.2.18.13) (PDF, 958KB)
• CFA 18 flood risk assessment report: Stoneleigh, Kenilworth and Burton Green (Ref: volume 5 appendix WR-003-018, ES 3.5.2.18.14) (PDF, 1.5MB)
• Stoneleigh, Kenilworth and Burton Green river modelling report (Ref: volume 5 appendix WR-004-011, ES 3.5.2.18.15) (PDF, 3.2MB)

Coleshill Junction: CFA 19

• CFA 19 water resources assessment report: Coleshill Junction (Ref: volume 5 appendix WR-002-019, ES 3.5.2.19.13) (PDF, 826KB)
• CFA 19 flood risk assessment report: Coleshill Junction (Ref: volume 5 appendix WR-003-019, ES 3.5.2.19.14) (PDF, 1.2MB)
• Coleshill Junction river modelling report (Ref: volume 5 appendix WR-004-012, ES 3.5.2.19.15) (PDF, 3.4MB)

Curdworth to Middleton: CFA 20

• CFA 20 water resources assessment report: Curdworth to Middleton (Ref: volume 5 appendix WR-002-020, ES 3.5.2.20.13) (PDF, 960KB)
• CFA 20 flood risk assessment report: Curdworth to Middleton (Ref: volume 5 appendix WR-003-020, ES 3.5.2.20.14) (PDF, 1.3MB)
• Curdworth to Middleton river modelling report (Ref: volume 5 appendix WR-004-013, ES 3.5.2.20.15) (PDF, 5.1MB)

Drayton Bassett, Hints and Weeford: CFA 21

• CFA 21 water resources assessment report: Drayton Bassett, Hints and Weeford (Ref: volume 5 appendix WR-002-021, ES 3.5.2.21.13) (PDF, 832KB)
• CFA 21 flood risk assessment report: Drayton Bassett, Hints and Weeford (Ref: volume 5 appendix WR-003-021, ES 3.5.2.21.14) (PDF, 1.2MB)
• Drayton Bassett, Hints and Weeford river modelling report (Ref: volume 5 appendix WR-004-014, ES 3.5.2.21.15) (PDF, 2.8MB)

Whittington to Handsacre: CFA 22

• CFA 22 water resources assessment report: Whittington to Handsacre (Ref: volume 5 appendix WR-002-022, ES 3.5.2.22.13) (PDF, 1.5MB)
• CFA 22 flood risk assessment report: Whittington to Handsacre (Ref: volume 5 appendix WR-003-022, ES 3.5.2.22.14) (PDF, 992KB)
• Whittington to Handsacre river modelling report (Ref: volume 5 appendix WR-004-015, ES 3.5.2.22.15) (PDF, 2.9MB)

Balsall Common to Chelmsley Wood: CFAs 23 and 24

• CFA 23 water resources assessment report: Balsall Common and Hampton in Arden (Ref: volume 5 appendix WR-002-023, ES 3.5.2.23.13) (PDF, 1.5MB)
• CFA 23 flood risk assessment report: Balsall Common and Hampton in Arden (Ref: volume 5 appendix WR-003-023, ES 3.5.2.23.14) (PDF, 6.1MB)
• River Blythe catchment preliminary flow calculations technical report (Ref: volume 5 appendix WR-004-016, ES 3.5.2.23.15) (PDF, 2.8MB)
• River modelling of the River Blythe and Bayley’s Brook technical report (Ref: volume 5 appendix WR-004-017, ES 3.5.2.23.16) (PDF, 2.7MB)
• River modelling of Bayley’s Brook (at Marsh Farm and Lavender Hall Lane), the River Blythe Bypass, Shadow Brook and Hollywell Brook technical report (Ref: volume 5 appendix WR-004-018, ES 3.5.2.23-24.1) (PDF, 4.8MB)
• CFA 24 water resources assessment report: Birmingham Interchange and Chelmsley Wood (Ref: volume 5 appendix WR-002-024, ES 3.5.2.24.13) (PDF, 586KB)
• CFA 24 flood risk assessment report: Birmingham Interchange and Chelmsley Wood (Ref: volume 5 appendix WR-003-024), ES 3.5.2.24.14 (PDF, 4.9MB)

Castle Bromwich to Curzon Street: CFAs 25 and 26

• CFA 25 water resources assessment report: Castle Bromwich and Bromford (Ref: volume 5 appendix WR-002-025, ES 3.5.2.25.13) (PDF, 706KB)
• CFA 25 flood risk assessment report: Castle Bromwich and Bromford (Ref: volume 5 appendix WR-003-025, ES 3.5.2.25.14) (PDF, 6MB)
• Initial groundwater modelling for the Bromford tunnel portals technical report (Ref: volume 5 appendix WR-004-020, ES 3.5.2.25-26.2) (PDF, 4.5MB)
• River modelling of the River Tame technical report (Ref: volume 5 appendix WR-004-019, ES 3.5.2.25-26.1) (PDF, 2.1MB)
• CFA 26 water resources assessment report: Washwood Heath to Curzon Street (Ref: volume 5 appendix WR-002-026, ES 3.5.2.26.12) (PDF, 734KB)
• CFA 26 flood risk assessment report: Washwood Heath to Curzon Street (Ref: volume 5 appendix WR-003-026, ES 3.5.2.26.13) (PDF, 8.7MB)
• River modelling of the River Rea technical report (Ref: volume 5 appendix WR-004-021, ES 3.5.2.26.14) (PDF, 1.9MB)

Map books

These map books contain the following map series:

• map series WR-01 shows the surface water features such as rivers and streams and their flood plains, ponds, canals and reservoirs, plus areas of historic flooding and areas likely to be affected by surface water flooding
• map series WR-02 shows the groundwater resources such as aquifers and the associated geological features
• map series WR-03 shows the existing quality of rivers and streams, including sensitive features such as sites of special scientific interest and source protection zones
• map series WR-05 and WR-06, which are only relevant for CFA 11, CFA 13 and CFAs 23 to 26, present the results of specific hydraulic modelling carried out to show the extent of the modelled flood plains for a range of rainfall events, for both the existing situation and after Phase One of HS2 has been built

Water resources map books:

• Water resources map book: Euston and London Metropolitan (Ref: 3.5.1.11.1) (PDF, 16MB)
• Water resources map book country: south (Ref: 3.5.1.11.2) (PDF, 50MB)
• Water resources map book country: north (Ref: 3.5.1.11.3) (PDF, 66MB)
• Water resources map book: West Midlands Metropolitan (Ref: 3.5.1.11.4) (PDF, 28MB)