Preparing a long term management plan for the future of the Slufter - - PowerPoint PPT Presentation

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Preparing a long term management plan for the future of the Slufter - - PowerPoint PPT Presentation

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Preparing a long term management plan for the future of the Slufter An analysis of the functional, spatial and geotechnical possibilities Roderik Heerema, MSc Wednesday October 24, 2012 Content Introduction The Port of Rotterdam

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Preparing a long term management plan for the future of the Slufter

An analysis of the functional, spatial and geotechnical possibilities

Roderik Heerema, MSc Wednesday October 24, 2012

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Content

  • Introduction
  • The Port of Rotterdam
  • Contaminated dredged material management in the

Netherlands

  • The Slufter
  • Conclusions
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Introduction

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DEME

Introduction

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Introduction

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Introduction

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Introduction

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The Port of Rotterdam

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The Port of Rotterdam

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The Port of Rotterdam

  • Every year:

– €500 Million Turnover – 430 million tons of goods throughput – 34,000 ocean going vessels and 100,000 inland vessels – Third largest port in the world

  • Expanding…
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The Port of Rotterdam Maasvlakte 2

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Contaminated dredged material management in the Netherlands

  • 3 to 5 million cubic meters of contaminated material dredged

yearly

  • Several facilities…
  • Total remaining storage capacity 85 million cubic meters
  • Enough for the next 32 years

Hollandsch Diep Ijseloog The Slufter

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The Slufter | CDF

  • Large scale Confined Disposal Facility
  • Built in 1987
  • Storage of contaminated dredged material
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The Slufter | Location

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The Slufter | Dimensions

6km 2km 260ha 3.7 miles 1.2 miles 642 acres

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The Slufter | Dimensions

NAP +24m NAP +6m NAP +2m NAP -28m

Dredged material

NAP

52m 30m

Total capacity 150 million m3

171 ft 98 ft 196 yd³

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The Slufter | History

  • Why it was built
  • The “Rhine Research Project”
  • The Slufter through the years…
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The Slufter | History

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The Slufter | Today

The Slufter is increasingly losing its function

  • Reduced supply of contaminated dredged material

– Expected lifetime in 1987 was 15 years – More than 24 years later only 50% has been filled

  • Overcapacity
  • Surplus of space which is not ready for use
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The Slufter | Functions

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The Slufter | Functions

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The Slufter

  • Building on dredged material

– Clay and silt particles – Very low bearing capacity

Dredged material Retaining structure New land Remaining storage capacity

A Geotechnical Challenge

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The Slufter

A Geotechnical Challenge

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The Slufter

400m

A Geotechnical Challenge

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The Slufter

A Geotechnical Challenge

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The Slufter

A Geotechnical Challenge

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The Slufter

The principle of dry storage

  • 1. Remove water sheet and lower ground water level
  • 2. Initiate a process of ripening dredged material
  • 3. Obtain a layer with sufficient bearing capacity

Ripened dredged material Dredged material

A Geotechnical Challenge

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The Slufter

A Geotechnical Challenge

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The Slufter | Solution

A long term approach

– Use the incoming supply of dredged material as elevation material – Elevate until the layer has sufficient bearing capacity and develop from thereon – Lower the ring-dike – Move towards a phased dismantlement of the Slufter

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30ha 2017 2022 2032 60ha 120ha

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Conclusions

  • Accept the current situation!
  • Initiate dry storage!
  • Use the space!
  • Create value!
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Questions?