la gestione dei sedimenti: la situazione in europa
DESCRIPTION
Intervento di Jos Brils, SedNet. Conferenza Finale Progetto GREEN SITE: “Supercritical fluid technologies for river and sea dredge sediment remediation”. LIFE 10 ENV/IT/343. Venezia, 13 dicembre 2013TRANSCRIPT
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European state -of -the-art on sediment
Final Conference LIFE+ project GreenSite “Innovative Technologies for Infra-structural Efficiency and Environment Protection”, 13 December 2013, Venice
European state -of -the-art on sediment management: sediment management 2.0
Jos Brils ([email protected])www.deltares.nlexperts.deltares.nl/jos.brils
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Content
My vision on:
• Sediment
• Sustainable sediment management: guiding principles
• Sediment management 2.0
• Ecosystem services as objective and common language• Ecosystem services as objective and common language
Vision based on
yes2013
trend
observed predicted
no
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Vision on sediment
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senzasenza sedimentisedimenti non non VeneziaVenezia--
sedimentosedimento è è unauna risorsarisorsa preziosapreziosa----
meritamerita di di essereessere ben ben gestitagestita!!
graciegracie freetranslation.com freetranslation.com fotofoto: : lag unalaguna di di VeneziaVenezia (J. (J. BrilsBrils, , graciegracie KLM)KLM)
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Hidden
Different visions(Hakstege, SedNet conference 2004)
Waste
Toxic
Not sexy
Difficult
Nimby
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Contradicting visions
yes (same quality)
assessed (scientific) = perceived (society)
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SedNet vision(Martin, 2002)
Too little sediment
Beaches erodeRiverbanks erodeWetlands are lostRiver profile degradation
Too much sediment
Obstruction of channelsRivers fill and floodReefs get smotheredTurbidity
Sediment as resource
Construction materialSand for beachesWetland nourishmentSoil enrichmentHabitat and food for life
Sediment = no waste = essential & integral element of our river systems
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What’s in a word …
Sand
ResourceHabitat
Clay
SedimentRiver bedCompost
Gravel Capping layer
FertilizerSuspended
matter
Suspended solids
LoosefillSilt
Dredged material
0,10
0,30
0,50
0,70
0,90
1,10
association (y-axis)
scientific (x-axis)positive
very non
very positive
neutral
LoosefillDredged material
DepositSludge
Mud
Waste
Mire
LeesSlurry
Dirt
DungCloth Mess
GunkFilth
Shit -1,50
-1,30
-1,10
-0,90
-0,70
-0,50
-0,30
-0,10-1,50 -1,30 -1,10 -0,90 -0,70 -0,50 -0,30 -0,10 0,10 0,30 0,50 0,70 0,90 1,10 1,30
Brils et al. (2004 ) Devine mud (290 Dutch sediment professional responses to questionnaire)
negative
very non
very negative
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Sustainable sediment management:guiding principlesguiding principles
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Sustainable sediment management(according to SedNet)
• in the context of the whole river system
• carefully balancing environmental and socio-economical values
• in increased interaction with stakeholders
Find solutions:
• embracing the whole soil-water system (integrated solutions)
• respecting natural processes and functioning
• not resulting in up-/downstream impacts, not now or in the future
Salomons & Brils (Eds.) (2004) Contaminated Sediments in European River Basins
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Sediment management 2.0
be well informed
‘trend watched’ by
manage adaptivelypursue a participatory approach
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Be well informed
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System understanding is the basis
measures
ecosystem at risk
globalchange
information
policy &manage-
mentpathwayssources receptors(ES)
e.g.Triad
Brils et al. (Eds) (2014) Risk-Informed Management of European River Basins
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tool type: in vitro & vivo assays field inventoryphysicochemical analysis
Triad approach
identifies:
indicates:
risk
effects ecosystem impacts
impacthazard
a.o. contaminants
causal linking: TIE orEDA
Salomons & Brils, 2004 (adapted)
modelecosystems
EPC(Effects & Probable Causes)
= =
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a personal, practical experience
in trying to influence the Meuse river basin management
policy agenda
Example from practice (be well informed ...)
policy agenda
a story abouttiming & urgency of scientific knowledge
Brils. May 24th Green Week 2012. Urgency and timing: key-pillars of the science-policy bridge
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One of its conclusions in 2008:
Flooding will
Once I was involved in a EU -project …
mobilize historic contamination from river banks and floodplains
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Such contaminated river banks occur:
Also in the Meuse river basin …
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I was aware of …
Brils et al. (2014)(inspired by Crilly, 2007)
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Their (unofficial) response:• Interesting• But need a more convincing story:
LA COMMISSION INTERNATIONALE DE LA MEUSE
Thus presented results to the IMC …
“elaborate an appealing example, where clearly quantified downstream risks result from remobilized contaminants from upstream Meuse riverbanks”
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• Flémalle site• Hypothetical, but
realistic, severe flood event simulation
• Using EXPOBASIN• Benzene, fluoranthene
Thus we did …
• Benzene, fluoranthene and cadmium as representative contaminants
• Funded by Deltares
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Keizers-veer
“crustaceans will be affected at downstream areas were the remobilized sediments settle again”
Outcome was …
Flemalle site
Eijsden
(February 2011)
quality of deposits (fluoranthene, µg/kg dw).
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Kingdon, 1992. model was used in:
Then ‘window of opportunity’ opened …
sediment at agenda of IMC annual plenary meeting (week 48, 2011)
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“after an orientating discussion of the theme 'sediment'
it is decided to let the theme rest due to lacking capacity and other priorities.”
Outcome was …
LA COMMISSION INTERNATIONALE DE LA MEUSE
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• It may take quite a lot of endurance to get scientific evidence noticed at policy making levels
• Timing is very important (and think our timing was right)• However, ‘sense of urgency’ is probably more crucial
My conclusions …
What can we do more – or hope for –
to get mobilization of historic contamination perceived as ‘urgent’ and thus to get it addressed in RBMPs?
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Manage adaptively
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Several adaptive cycli
management
global
measures
policy &manage-receptors
knowledge
apply
policy
formulate
implement
ecosystem at risk
globalchange
information
manage-mentpathwayssources receptors
(ES)
explore organize
share
update
monitor & evaluate
assess
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Pursue a participatory approach
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Learn together to manage together
learn-by-doing:allow for experimentation
cocreation ofknowledge
Brils et al. (Eds) (2014) Risk-Informed Management of European River Basins
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Most difficult, however …
however …
“It is human nature to stay within our own
comfort zones”
Brils et al. (Eds) (2014) Risk-Informed Management of European River Basins
Peggy Guggenheim foundation, Venice
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Example from pratice (Living with Dredged Material project)
Adriaan Slob, TNO, [email protected] (coördinator Living with Dredged Material)
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Ecoystem servicesas objective andas objective andcommon language
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Ecosystem services: the services of nature
COM (2013) Mapping and Assessment of Ecosystems and their Services (MAES)
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Sediment ecosystems (and their services)
high
Profit People Planet
economy:jobs & energy
Conclusions from session at SedNet conference 2013, Lisbon (chair: J. Brils)
key issues
perceivedurgency
low
safety & health
(sediment)ecosystem services
contributionecosystems work 24/7 for
you,for free! *
* Alan Covich , 2011 SedNet conference
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Sediment ecosystems (and their services)
high
Profit People Planet
economy:jobs & energy
construction sandbiomass for energy
fascinating study object
flood defenseC-sequestrationwater retention
Conclusions from session at SedNet conference 2013, Lisbon (chair: J. Brils)
key issues
perceivedurgency
low
safety & health
(sediment)ecosystem services
contribution
works 24/7 for you, for free!toxics immobilization
biomass for consumptionbiodiversity to enjoy
thank youecosystem!
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be well informed
To conclude: sediment management 2.0 =
ThankThank youyou forforyouryour attention!attention!
manage adaptively pursue a participatory
approach
... and ecoystem services as objective and common language