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Building with natureConcepts and applicationsMindert de Vries, Specialist Advisor Eco-engineering
May 2010
Building with nature=
Building with nature=
use the
natural dynamics of the ecosystem
to create
flexible and sustainable infrastructure
while enhancing nature values
use the
natural dynamics of the ecosystem
to create
flexible and sustainable infrastructure
while enhancing nature values
… principles …… principles …
shared solutions, based onshared investment and shared knowledgebetween market, government and science
shared solutions, based onshared investment and shared knowledgebetween market, government and science
innovative process
paradigm shift, pro-active,across disciplines and
balancing thinking and doing
innovative process
paradigm shift, pro-active,across disciplines and
balancing thinking and doing
Building with Nature approach
• Start with largest possible scale, robust,restore gradients, allow dynamics, let it grow.
• Network, share ideas, share knowledge• Paradigm shift “what can we do for nature,
what can nature do for us”• Balance thinking and doing: show it in pilots• Monitor and analyse to understand key
processes.
BwN for coastal defense: concept
• Restore ecosystems along coastlines.
• Create healthy, stable designs that make useof nature and engineering, that stabilize thecoastline and protect against flooding.
• Create flexible, climate proof and sustainablesolutions
• Combine functions
Marshland kwelders
Foto paesens-moddergat
Effective low costlow tech saltmarshproduces safety& large natural value
Dutch historical large scale land reclamation =building with nature
Wave reducingsaltmarsh
sea dike
Vegetatie als golfremmer
Mindert de Vries,John de Ronde,DHV,IMARES,Alle Hosper
Saltmarsh grows with sea level and maintains stability and safetyHigh BwN, low tech, low maintenance cost Lake
IJsselmeer
Afsluitdijk
WaddenSea
Wave reducingsaltmarsh
Super stormstable vegetated
dune
WaddenWadden SeaSea SuperSuper DikeDike:: saltmarshsaltmarsh//dunedune//dikedike hybridhybrid
Existing dike
Oysterreef construction for shore stabilisation
Various configurations aretested for effectivity
Oyster-mattress stabilizes sedimentand is basis for a living reef
River dike application: wavereducing hybrid dike ‘fortSteurgat’
Deltares concept and designhas now been officially acceptedto achieve required 1/2000 safetystandards and is integrated in this300 million euro project
Wave reducingwillow-tree plantationsLow cost low tech
Clay dikewill be lower thantraditional design
June 2009, 100x30m floating wave reducing marsh pilotusing traditional techniques, inspired by Louisianaswamps
Low-techfloating structure
of willow treebranches
Louisiana after Katrina: restoration of marshes can bepart of BwN solution for safety against storm surges
2009: Yankee pond:proposal for large scale wavereducing marsh restoration
using Dutch technology.
Cooperation with DHV, Stateof Louisiana &
National Parks Service
BwN perspective onsustained safety combined
with healthy productivenatural system
(prepared for USACE)
Healthy nature helps toprotect the population
Ecological Engineering, 2009
State of the art research, in order to proof concepts
• Field• Laboratory facilities• Numerical
modelling• Papers accepted in
journals
Building with nature projects overview
2009
2008
2007
USA SNG
The Netherlands are leading ineco-engineering applied forsafety against flooding
2010
Louisiana now: Gulf Oil Spill threatens the Delta
• BwN Solution combines state-of-the-art science withstate-of-the-art technology and access to broadnetwork• Explore and optimize solution using BwN concepts
(Deltares)• Use predictive numerical modelling for optimal
design(Deltares)• Input potential for large scale Engineering and
Nourishment Technology (van Oord)• Utilize extended BwN Network (Deltares, van Oord
and many other parties) if need arises• Balance thinking and doing!
Operational Louisiana coastal models
Since Katrina we have advanced 3D models runningfor Gulf and LA coast in cooperation with USAcounterparts
What can we do:• Operational forecasting of hydrodynamics• Operational forecasting of the fate and transport of oil
based on detailed 3D current patterns.• Forecasting of stability of Chandeleur Islands• Flushing of marshes in Mississippi delta.
Start of simulation: 9 May 2010:based on satellite image (onlymain patch; no sheen)
NASA / MODIS (Aqua): May 9, 2010
ESA, Envisat SAR:May 9, 20103D oil spill modeling
Prediction after 4 days on 13 May 2010 using NOAAwind forecasts and 6 hour updates of currents
3D oil spill modeling, 4 days later
Stability of Chandeleur Islands
• Deltares develops world-leading models for hurricanemorphodynamics simulation (XBeach, Delft3D)
• Solution for oil spill could include sustainable solutionfor Chandeleur Islands
• Lifetime of restored islands will be determined byhurricane impact
• Validation of models together with USGS –• only study ever to hindcast hurricane overwash
correctly for an entire area
Simulation of Hurricane Katrina at Chandeleurs
• Large area vulnerable
• Infinite coastline length
• Many entry points
• Impossible to defend
• Impossible to clean
main trajectoryof oil spill
Deepwater HorizonGulf Oil Spill
Can we find a BwNsolution?