Glasgow Strategic Drainage PlanGlasgow Strategic Drainage Plan

Iain Macnab Iain Macnab –– Head of Environmental ServicesHead of Environmental Services

Glasgow City CouncilGlasgow City Council

Lenzie Street ~ 80m AOD

30 July 2002 1415 hours

Lenzie Street30 July 2002 1430 hours

Leisure Centre

Lenzie Street

30 July 2002 1710 hours

To Springburn Road

30 July 2002 1715 hours

Lenzie Street

To Elmvale Row

30 July 2002 1715 hours

Springburn Road

Elmvale Row ~ 52 m AOD

30 July 20021500 hours

Elmvale Row

30 July 2002 1630 hours

Elmvale Row

30 July 2002 1800 hours

Flood Level

Elmvale Row

1 Aug 2002

Extract from CIRIA Designing for Exceedance Draft Report No 699

Interaction between major and minor systems during an extreme event

6000 M3 (Est.)

Overland Flow

6000 M3 (Est.)

Sewer Flooding

WORST CASE FLOODING (SEVERE WEATHER EVENT)FLOOD COMPONENT ANALYSIS - ESTIMATE OF FLOOD VOLUMES

1200

mm

app

rox.

Top Water Level

Glasgow Flooding 30/7/02 – Elmvale Row, Springburn

Sewer incapacity tbcby sewer modelling

Overland flow/ surface water solution required

Recorded Flood Events

28 Sep 76

14 Nov 94

12 Dec 94

1 Jul 01

30 Jul 02

NB Statutory component in terms of SSA 1968

NB Non-statutory component in terms of SSA 1968

Dep

th o

f Flo

odin

g 1000 M3 (Est.)Infiltration due to High Groundwater LevelsSewer Rehab Required ?

Oct 02

Solution deferred meantim

e on grounds

of cost and need for knowledge

Glasgow Catchments - ‘Priority 1 and 2’ Sewer Flooding Locations

Dalmuir

Shieldhall

Dalmarnock

Daldowie

W457

W683W599

W232W50W656

W45W585W265

W353

W71W675W674

W515 W681

W510

W347W668

W348W335

W174

W657W658

W76W78 W654

W77W111

W428

W354W299

W346

W81W620

W7

W419

W423

W376

W398W574

W698W650

W75

W63W553

W42

W454

W43W54 W54

W52 W68W67

W65

W120

W300

W298W115

W83

W82W82

W591W639

W361W117W364

W116

W116

Sewer Flooding Driver

Oct 03

GSDP Catchments - ‘Q&S2’ uCSOs

Dalmuir

Dalmarnock

Shieldhall Daldowie

41344101

41204119

4106

41074108

4109 41104112

4111

4003

4004

4128

4005

4129

9501

41145079

5078

3125

3112 3016

310530013013

3006

3067

21452147

50915184

50835098

5067

50685083 5008

5010

50965066

5095

5086

5192

31443136

306631033131

3094306330693134

4091

3031

4046

5070

5061

50155017

5013

5006507250885085

5097

51125113

51785188

Water Quality Driver

Oct 03

1 Edinburgh City 431,000 1,561,688 35,876 8 750

Shieldhall 340,000 24,691,395 401,893 118 1100Dalmarnock 130,000 1,996,009 51,000 39 1035Dalmuir 400,000 12,817,750 250,469 63 1035Daldowie 200,000 2,356,000 170,000 85 900

2 GSDP Area 1,070,000 41,861,154 873,362 82 1050

(1) Catchment

(7) Comment

(6) Standard Average Annual Rainfall (SAAR) (mm)

(4) Strategic

Response - 10 Spills per

Annum Storage Volume

(m3)

(3) Time Series

Rainfall Predicted

Annual Spill Volume

(m3)

(2) Catchment Population

(No)

(5) 10 Spills

per Annum Storage Volume/

Head (m3/100 persons)

GSDP Catchments - Network Storage Volumes required to limit spills to 10 events per annum

Dec 03

NB Figures reduce by about 50 % for the 30 events per annum spill criterion

StormwaterStorage Tank

Sheffield

13,175 m3

The Glasgow Strategic Drainage Plan

Implementation of the Plan will achieve The Vision: Sustainable Drainage for Glasgow

Further Economic

Development and Improved Quality of Life

Objectives:

• Development constraint removal

• Flood risk reduction

• Water quality improvement

• Watercourse habitat improvement

• Integrated and optimized investment planning

Apr 03

xx

Sewer

Culvert

RiverExisting Development

Existing Development

Potential New Development

Potential New DevelopmentPotential New Development

“Making Space for Water” – Corridors of Opportunity

4

1

3

Nov 04

2

Corridors of Opportunity

1. Garthamlock/ Cardowan (Light Burn)

2. Robroyston et al (Molendinar Burn)

3. Clyde Gateway (River Clyde)

4. EERR (Lower Camlachie)

5. Riddrie Initiative (Carntyne Burn)

6. Shettleston/Easterhouse Initiative (Upper Camlachie)

7. Tollcross Initiative (Tollcross Burn)

8. Fullarton Initiative (Battle Burn)

5 6

7

8

Sustainable water management involves achieving a better balance in the

serviceability performance of surface water utilities in the built environment

STEP 3c: Solutions (regional)

STEP 3b: Solutions (retrofitting)

Overland Flow Studies

Overland Flow Studies

Overland Flow Studies

Overland Flow Studies

Strategic Surface Water Management

Surface WaterManagement

Scot. Water

SEPA

SNH

BritishWaterways

Local Authorities

Property

Area Planning

Landscape &Environment

City Plan

Land Services

ConsultantsDevelopers

Development and Regeneration ServicesDevelopment and Regeneration Services

Solution!Solution!

Surface Water Management PlansSurface Water Management Plans

•• Area SUDS Area SUDS •• Rain GardensRain Gardens•• Water SquaresWater Squares•• Attenuation ParksAttenuation Parks•• Green CorridorsGreen Corridors