European state-of-the-art on sediment
management: sediment management 2.0
Jos Brils (jos.brils@deltares.nl)
www.deltares.n...
Content
My vision on:
•

Sediment

•

Sustainable sediment management: guiding principles

•

Sediment management 2.0

•

...
Vision on sediment
senza sedimenti non Venezia
sedimento è una risorsa preziosa
merita di essere ben gestita!
gestita!

gracie freetranslatio...
Different visions
(Hakstege, SedNet conference 2004)

Hidden
Toxic

Waste

Not sexy

Difficult

Nimby
Contradicting visions

yes (same quality)

assessed (scientific) =

perceived (society)
SedNet vision
(Martin, 2002)

Too much sediment

Too little sediment

Sediment as resource

Obstruction of channels
Rivers...
What’s in a word …
association (y-axis)
Sand
Resource

1,10

Clay

Habitat

very positive

0,90

River bed

Compost
0,70

...
Sustainable sediment management:
guiding principles
Sustainable sediment management
(according to SedNet)

Find solutions:
•

in the context of the whole river system

•

car...
Sediment management 2.0
‘trend watched’ by

be well
informed

manage adaptively
pursue a participatory
approach
Be well informed
System understanding is the basis

measures

global
change

sources

pathways

ecosystem

receptors
(ES)

policy &
managem...
Triad approach
tool type:

physicochemical analysis

in vitro & vivo assays

field inventory

indicates:

a.o. contaminant...
Example from practice (be well informed ...)

a personal,
practical experience
in trying to influence the
Meuse river basi...
Once I was involved in a EU-project …

One of its conclusions in 2008:

Flooding will
mobilize historic
contamination from...
Also in the Meuse river basin …
Such contaminated river banks occur:
I was aware of …

Brils et al. (2014)(inspired by Crilly, 2007)
Thus presented results to the IMC …

Their (unofficial) response:
• Interesting
• But need a more convincing story:

LA CO...
Thus we did …

• Flémalle site
• Hypothetical, but
realistic, severe flood
event simulation
• Using EXPOBASIN
• Benzene, f...
Outcome was …

“crustaceans will
be affected at
downstream areas
were the remobilized
sediments settle
again”

Keizersveer...
Then ‘window of opportunity’ opened …

Kingdon, 1992.
model was used in:

sediment at agenda of IMC annual
plenary meeting...
Outcome was …

“after an orientating discussion
of the theme 'sediment'
it is decided to let the theme rest due to
lacking...
My conclusions …

• It may take quite a lot of endurance to get scientific evidence noticed
at policy making levels
• Timi...
Manage adaptively
Several adaptive cycli
implement

management
apply

measures

global
change

sources

formulate

receptors
(ES)

pathways
...
Pursue a participatory approach
Learn together to manage together

learn-by-doing:
allow for experimentation
cocreation of
knowledge

Brils et al. (Eds) (...
Most difficult, however …
however …

“It is human nature to
stay within our own
comfort zones”
Peggy Guggenheim foundation...
Example from pratice (Living with Dredged Material project)

Adriaan Slob, TNO, adriaan.slob@tno.nl (coördinator Living wi...
Ecoystem services
as objective and
common language
Ecosystem services: the services of nature

COM (2013) Mapping and Assessment of Ecosystems and their Services (MAES)
Sediment ecosystems (and their services)

People

Profit

high

Planet

economy:
jobs & energy
safety & health

perceived
...
Sediment ecosystems (and their services)

construction sand
biomass for energy
fascinating study object

flood defense
C-s...
To conclude: sediment management 2.0 =

be well
informed

manage
adaptively

pursue a participatory
approach

... and ecoy...
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La gestione dei sedimenti: la situazione in Europa

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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 2013

Published in: Technology, Business
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La gestione dei sedimenti: la situazione in Europa

  1. 1. European state-of-the-art on sediment management: sediment management 2.0 Jos Brils (jos.brils@deltares.nl) www.deltares.nl experts.deltares.nl/jos.brils Final Conference LIFE+ project GreenSite “Innovative Technologies for Infrastructural Efficiency and Environment Protection”, 13 December 2013, Venice
  2. 2. Content My vision on: • Sediment • Sustainable sediment management: guiding principles • Sediment management 2.0 • Ecosystem services as objective and common language observed predicted trend Vision based on 2013 no yes
  3. 3. Vision on sediment
  4. 4. senza sedimenti non Venezia sedimento è una risorsa preziosa merita di essere ben gestita! gestita! gracie freetranslation.com foto: laguna di Venezia (J. Brils, gracie KLM) foto: Brils,
  5. 5. Different visions (Hakstege, SedNet conference 2004) Hidden Toxic Waste Not sexy Difficult Nimby
  6. 6. Contradicting visions yes (same quality) assessed (scientific) = perceived (society)
  7. 7. SedNet vision (Martin, 2002) Too much sediment Too little sediment Sediment as resource Obstruction of channels Rivers fill and flood Reefs get smothered Turbidity Beaches erode Riverbanks erode Wetlands are lost River profile degradation Construction material Sand for beaches Wetland nourishment Soil enrichment Habitat and food for life Sediment = no waste = essential & integral element of our river systems
  8. 8. What’s in a word … association (y-axis) Sand Resource 1,10 Clay Habitat very positive 0,90 River bed Compost 0,70 Gravel Capping layer Sediment 0,50 neutral scientific (x-axis) Fertilizer 0,30 Suspended solids Silt 0,10 Loosefill -1,50 -1,30 -1,10 -0,90 -0,70 -0,50 Mud -0,30 -0,10 -0,10 Suspended matter 0,10 0,30 0,50 0,70 0,90 1,10 1,30 Deposit negative -0,30 -0,50 Waste -0,70 very negative Slurry Mire Cloth Mess Gunk -0,90 Lees Filth Shit -1,10 Dirt Dung non very Dredged material Sludge positive -1,30 -1,50 Brils et al. (2004 ) Devine mud (290 Dutch sediment professional responses to questionnaire)
  9. 9. Sustainable sediment management: guiding principles
  10. 10. Sustainable sediment management (according to SedNet) Find solutions: • in the context of the whole river system • carefully balancing environmental and socio-economical values • in increased interaction with stakeholders • 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
  11. 11. Sediment management 2.0 ‘trend watched’ by be well informed manage adaptively pursue a participatory approach
  12. 12. Be well informed
  13. 13. System understanding is the basis measures global change sources pathways ecosystem receptors (ES) policy & management at risk information Brils et al. (Eds) (2014) Risk-Informed Management of European River Basins e.g. Triad
  14. 14. Triad approach tool type: physicochemical analysis in vitro & vivo assays field inventory indicates: a.o. contaminants effects ecosystem impacts identifies: hazard causal linking: Salomons & Brils, 2004 (adapted) risk = TIE or EDA = model ecosystems EPC (Effects & Probable Causes) impact
  15. 15. Example from practice (be well informed ...) a personal, practical experience in trying to influence the Meuse river basin management policy agenda a story about timing & urgency of scientific knowledge Brils. May 24th Green Week 2012. Urgency and timing: key-pillars of the science-policy bridge
  16. 16. Once I was involved in a EU-project … One of its conclusions in 2008: Flooding will mobilize historic contamination from river banks and floodplains
  17. 17. Also in the Meuse river basin … Such contaminated river banks occur:
  18. 18. I was aware of … Brils et al. (2014)(inspired by Crilly, 2007)
  19. 19. Thus presented results to the IMC … Their (unofficial) response: • Interesting • But need a more convincing story: LA COMMISSION INTERNATIONALE DE LA MEUSE “elaborate an appealing example, where clearly quantified downstream risks result from remobilized contaminants from upstream Meuse riverbanks”
  20. 20. Thus we did … • Flémalle site • Hypothetical, but realistic, severe flood event simulation • Using EXPOBASIN • Benzene, fluoranthene and cadmium as representative contaminants • Funded by Deltares
  21. 21. Outcome was … “crustaceans will be affected at downstream areas were the remobilized sediments settle again” Keizersveer Eijsden (February 2011) Flemalle site quality of deposits (fluoranthene, µg/kg dw).
  22. 22. Then ‘window of opportunity’ opened … Kingdon, 1992. model was used in: sediment at agenda of IMC annual plenary meeting (week 48, 2011)
  23. 23. Outcome was … “after an orientating discussion of the theme 'sediment' it is decided to let the theme rest due to lacking capacity and other priorities.” LA COMMISSION INTERNATIONALE DE LA MEUSE
  24. 24. My conclusions … • 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 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?
  25. 25. Manage adaptively
  26. 26. Several adaptive cycli implement management apply measures global change sources formulate receptors (ES) pathways ecosystem share at risk information update monitor & evaluate explore policy & management organize assess knowledge policy
  27. 27. Pursue a participatory approach
  28. 28. Learn together to manage together learn-by-doing: allow for experimentation cocreation of knowledge Brils et al. (Eds) (2014) Risk-Informed Management of European River Basins
  29. 29. Most difficult, however … however … “It is human nature to stay within our own comfort zones” Peggy Guggenheim foundation, Venice Brils et al. (Eds) (2014) Risk-Informed Management of European River Basins
  30. 30. Example from pratice (Living with Dredged Material project) Adriaan Slob, TNO, adriaan.slob@tno.nl (coördinator Living with Dredged Material)
  31. 31. Ecoystem services as objective and common language
  32. 32. Ecosystem services: the services of nature COM (2013) Mapping and Assessment of Ecosystems and their Services (MAES)
  33. 33. Sediment ecosystems (and their services) People Profit high Planet economy: jobs & energy safety & health perceived urgency ecosystems work 24/7 for you, for free! * contribution (sediment) ecosystem services low key issues * Alan Covich , 2011 SedNet conference Conclusions from session at SedNet conference 2013, Lisbon (chair: J. Brils)
  34. 34. Sediment ecosystems (and their services) construction sand biomass for energy fascinating study object flood defense C-sequestration water retention People Profit high Planet economy: jobs & energy safety & health perceived urgency contribution thank you ecosystem! (sediment) ecosystem services low key issues toxics immobilization biomass for consumption biodiversity to enjoy Conclusions from session at SedNet conference 2013, Lisbon (chair: J. Brils) works 24/7 for you, for free!
  35. 35. To conclude: sediment management 2.0 = be well informed manage adaptively pursue a participatory approach ... and ecoystem services as objective and common language Thank you for your attention!
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