rene kolman.ppt [מצב תאימות]events.eventact.com/Ortra/IAPH2012/rene kolman_ppt.pdf ·...
Transcript of rene kolman.ppt [מצב תאימות]events.eventact.com/Ortra/IAPH2012/rene kolman_ppt.pdf ·...
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Greener Dredging
IAPH mid-term conferenceJerusalem May 23 2012
René KolmanSecretary General IADC
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Overview
• IADC, who are we.• Where we are coming from• The status of dredging
todaytoday• Where we are going: a
greener future
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IADC, who we are
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Dredging and perception • Zalul to Israel's Port Authority: "Dredging the
Haifa harbor and the Kishon River pollutes the sea with poisonous sludge and endangers public health!“ source:http://www.zalul.org.il/en/artical315.asp
• Volcani Center: “According to our knowledge, • Volcani Center: “According to our knowledge, the riverbed is not contaminated to the point of justifying the treatment planned by the Environmental Protection Ministry” Source:http://www.dredgingtoday.com/2012/03/28/israel-scientists-oppose-kishon-river-dredging/
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Environmental Aspects of Dredging
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Environmental Overflow Valve
‘Green valve’:
• Imperfect overflow
• Reduces air entrainment
• Reduces turbidity around vessel• Reduces turbidity around vessel
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Dedicated equipment
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Melbourne channel deepening project
Quarry tests
Specialisedripper draghead
Lab tests
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minimise impacts
• Early contractor involvement• Predictive models• Building with Nature
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Early contractor involvement
• Traditional
• Partnering
• Alliance
Tang et al., derived from Terra et Aqua 113, 2008
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• Client: once in a life timeContractor daily business
• Involve contractor from a very early stage• Make use of the knowledge of the contractor
ECI advantages
• Share benefits• Reduce risk
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Predictive models
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enhanced Afsluitdijk?enhanced Afsluitdijk? Mississippi DeltaMississippi Delta
Building with Nature
Must we carry on like this?
Mississippi DeltaMississippi Delta
Happisburgh, UKHappisburgh, UKDeep Water Navigation ChannelYangtze Estuary, ChinaDeep Water Navigation ChannelYangtze Estuary, China
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Building with Nature
PIANCWorking with naturevlaamsebaaien.com
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Large-scale experiments (2010)3 reefs, 400 m3 oyster shells each
Example 1, oyster reefs
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Example 2, sand engine Delfland
Dune formation Rare species
Aug 2011
Morphological changes
Recreation
Jan 2012
Zand-motor
Delfland
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Convergence of perceptions
Dredging companies that care!