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SUDS in the Netherlands
North Sea Skills Integration and New
Technologies
Hamburg, 10 November 2009
Floris Boogaard (TU Delft/Tauw)
ir. F.C. (Floris) Boogaard,
(020) 606 32 50/06-51 55 68 26
e-mail: f.c.boogaard@tudelft.nl/
Floris.boogaard@tauw.nl
content
• Dutch situation (storm) water management
• SUDS in the Netherlands by two examples:
ƒ Wadi (‘integrated’)
ƒ Lamellar separator (‘new’)
• Research and challenges
Dutch water management: water level
Growth and urban density
1900
1970
2005
Current situation:
70% combined sewer systems
Disconnecting:
• Less sewer overflows
• Optimizing sewage plants
• harvesting rainwater
• Improving surface water quality
• …
Improving surface water quality?
Guidelines for storm water purification
category? Industrial/commercial/residential areas
Purification method needed? SUDS?
Research
what is the Dutch storm water quality?
Database storm water database
content: ca 7500 measurements
Over 200 locations in the Netherlands with
different type of catch area.
More then 100 location abroad (European)
SUDS in holland
WB 21 categorie
afkoppelmethode
Specificatie techniek of product
Benutting
Kleinschalige benutting
benuttingsinstallatie
- regenton, bergingszak
- regenwaterbenuttingsinstallaties
Vasthouden
Vegetatiedak
daktuinen
- mos-, sedum-, grasdak
- uitgebreide berging op daken
Vasthouden/
Bergen
Infiltratie
Wadi’s, bermfiltratie
bovengronds
“
Doorlatende verharding
-
maaiveldprofilering
- halfverharding, doorlatende verharding
(waterpasserende stenen, nokkeninfiltratie)
doorgroeibare verharding (grastegels)
- IT: beton en kunststof
- grindkoffers
- kratten, honingraad, krukjes, bollen
Infiltratie
Infiltratieriolen,
Infiltratiesleuf
ondergronds
(percolatie) Infiltratieunits,
infiltratieput/zakputten
Diepinfiltratie
- gesloten, open leidingen (goten)
Afvoer Afvoer direct Directe afvoer naar
en
oppervlaktewater
- (verbeterd-) gescheiden stelsel
Zuiveren
Filtratie
Kleinschalige decentrale
filters
- Bladvang, buisfilter (cycloon,..)
- Filterkolken, zandvangputten,
Filtratie,
adsorptie
Adsorptie
Bodempassage
- zoals wadi, vaak met extra bindingsstoffen
Adsorbens
textielen
- zeoliet, actief kool, lava, kokoskorrels humus
- 3DWater Sorb-X
Bezinking
Centrale filters
Lamellenafscheiders
(ondergronds)
Bezinkbakken,
bezinkvijvers
(bovengronds)
-
“
slibvangputten, olieafscheiders
facet/hydrasep, 3D
- betonnen bakken, damwanden, natuurvriendelijke
oever
survey
What are the main (top 5) criteria?
1. Pressure on public space;
2. Cost (construction and maintenance);
3. Removal efficiency;
4. Maintenance;
5. Knowledge in organization
….
Good examples are not hard to find…
Learning from dysfunctional SUDS
?
How will it
look like in
5-40 years?
Learning from dysfunctional SUDS
Learning from dysfunctional SUDS
Two examples
The history of SUDS in Holland
ƒ Wadi (integrated)
ƒ Lamellar separator (new)
Example 1: Enschede, Ruwenbos
Blue wadi
Red wadi Green wadi
implementation of the wadi-system
development
1992
time
Two examples
The history of SUDS in Holland
ƒ Wadi (integrated)
ƒ ‘takes up a lot of space lets find
innovative alternatives for dense
populated urban areas’
ƒ Lamellar separator (‘new’)
example 2: The lamellar separator
Lamellenfilters:ontwerp
“Compact basin, high removal
efficiency on suspended solids”
12 november 20091 November
2007
19
example 2: implementation lamellar separator
development
2000
2005
2009
time
research
development
Second generation
Laboratory tests TU Delft
inspections
First generation
Learning from
implementation
2000
2009
time
Lamellar testing at TU Delft
Results: achievements of the separators
Learning from dysfunctional SUDS:
‘clogging’
12 november 20091 November
2007
24
Learning from dysfunctional SUDS:
clogging
communication:
‘confronting’ sales-departments and actors
Improvement first generation seperators
• maintenance
• pre treatment
• sediment traps
Communication: learning on the job
Continue research
development
third generation
communication
3 monitoring sites
Research documents
Second generation
Laboratory tests TU Delft
inspections
First generation
Learning from
implementation
2000
2009
time
Research documents
Conclusions
In Holland SUDS are widely used
Lots of research is done however, the implementation
of innovative SUDS can move to fast.
SUDS can be improved by:
• Research on main criteria by
ƒ Lab testing
ƒ inspections
• Learning from good and bad examples (SKINT)
• Communication (all actors)
• International knowledge exchange (SKINT)
Questions / discussion
Communication and results SKINT
http://kvina.niva.no/skint/
diverse
Sediment load: hard to predict
Learning from disfunctional SUDS: the
real thing
?
Visual research on 20 sites…
Ter vergelijking: lamellen in Delft bij 10l/s
Development in time
ontwikkeling
third generation
Laboratory tests TU Delft
3 monitoring sites
second generation
inspections
First generation
Leren van implementatie
1999
2009
time
List of countries and dependencies
by population density
How to deal with stormwater?
The quality aspect of SUDS
‘Storm water is
considered to be
clean so no
treatment is
needed for
purification’
Present situation and problems
Changing views on the changing climate and
ambitions of the water framework will
demand a multidisciplinary approach within
the spatial planning process, especially in
dense populated urban areas such as
Holland and other European countries.
(SKINT, 2008)
Soil
gully
geotextile
storage
drain