Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Urban storm water floods

Deltas in times of Climate Change 2010 Rotterdam 1-oct 2010 [email protected]

Heavy rain, but not extreme

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

After extreme shower Egmond aan Zee Augustus 2006

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Apeldoorn 3 Juli 2009

Apeldoorn 3 Juli 2009

115 mm in 1,5 hour

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

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October 13, 2010

Apeldoorn 3 Juli 2009

Video

Content

• Causes of increased flooding • What to do? • Maps for evaluation & communications • Example • Conclusions

Jeroen Kluck, Tauw bv

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Slide 7 j1

jku; 01/10/2010

Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Cause of more urban flooding

• Increase of impervious area’s • Street lay-out • No side kerbs

• Climate change • 25% in 2050 daily rainfall • Peak in one hour?

Extremes not clear T=10 T=100 T=250 T=1000 gem eten De Bilt Egmond aan Zee Apeldoorn

120

Regen (mm) (mm) Regen

100

97 95 86

80 72 60

60

70

61 45

40

40

92 83

81

54 50.2 50 46 45

30.3 30

29 26

20

0 0

0

Jeroen Kluck, Tauw bv

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60 Daur (Minuten)

90

120

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

What to do? • Nothing? (low frequency, mostly no extreme damage) • No! Deventer Aug 2010

What to do? • Nothing? (low frequency, mostly no extreme damage) • NO! Be prepared! • “Climate change is opportunity for improving urban area” – Above ground sollutions • 3 points approach

Disaster

Standard

Daily

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Self-organised criticality (SOC)

€ hinder, schade en gevaar

0,1

1

2

10

100

herhalingstijd T in jaren

Effect climate change

€ hinder, schade en gevaar

0,1

1

2

10

100

herhalingstijd T in jaren

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Three points approach

Spatial planning and urban planning

€ Nuisance, damage, danger

Technical facilities

WFD, traffic, quality of life, 0,1 values of water, 1 2 etc

10

100

Return period T in years

What to do?

• Design standard: T=2: • Check: T=100:

no water in streets no water in houses

• Evaluate urban storm water drainage at real extreme events • Vulnerable locations • Possible solutions


Emphasis importance of space for water

• Above ground solutions
Improve daily life

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Evaluation at T=100

• DEM in GIS for analysis of • Depressions • Flow paths

• Maps meant for • Communication / Interaction

• Specific locations • 1D sewer & 2D overland flow

Urban flood maps • Local situation • Occurred floodings • Flood evaluation • DEM LiDAR: 1 point/m2
10 points/m2 • Type of surface: houses, roads & water • Extreme storm: eg 60 mm (T=100 + climate change) – 20 mm in sewer (not simulated) – 40 mm above ground

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

Jeroen Kluck, Tauw bv

October 13, 2010

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

Jeroen Kluck, Tauw bv

October 13, 2010

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

Jeroen Kluck, Tauw bv

October 13, 2010

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Interaction between stakeholders

- Flood maps on touch table - Discuss possible floodings and solutions for storm T=100 years - Find space for water - Investigate effects Workshop city of Apeldoorn • Water, • green, • Road department, • Local urban manager Exchange of experiences

Conclusions on storm water flooding • 3 points approach • T=100 no flooding of properties • Solutions improving daily life – Above ground: storage & diverting

• Analysis of really extreme events • DEM: GIS • Communication/interaction • 2D/3D for specific locations

• Increase resilience in coming years

Jeroen Kluck, Tauw bv

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Final message • DEM-analysis: quick and straight forward
• Temporary urgency • Comprehensible

Rio de Janeiro April 2010 [email protected]

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Egmond aan zee, Plannen tav Wateroverlast en Strandpijp

October 13, 2010

Example of measures

Effect

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