We studied the impact of floating urbanisation on water quality and ecology using innovative under water drones. Presentations shows many floating projects in the netherlands

1. The effect of floating urbanisation on
ecology and water quality
F.C. Boogaard(2)(4), R.E. de Graaf(1)(5), M. Dionisio
Pires(3), V. Sazonov(1)(5), R.L.P de Lima(1)
(1) DeltaSync, Delft, The Netherlands; (2) Tauw, Amsterdam, The
Netherlands; (3) Deltares, Delft, The Netherlands; (4) Hanze University of
Applied Sciences, Groningen, The Netherlands; (5) Rotterdam University
of Applied Sciences, Rotterdam, The Netherlands
ir. F.C. (Floris) Boogaard,
0031651 55 68 26
e-mail: f.c.boogaard@tudelft.nl
floris.boogaard@tauw.nl

2. Content
• Research questions
• Effect on water quality
• First inventarisation
• Measurements
– Innovating approach
– First results
• More info?
• Knowledge exchange

3. Objectives / Research Question
• The impacts of floating urbanization on water quality
and ecology are largely unknown by water authorities
and municipalities (needed for policy framework and
regulations).
• Research question: What are the (negative and
positive) impacts of floating urban development on
water quality and ecology?

4. 1/21/20154
Hypotheses
*The shadow of floating houses reduces available sunlight. This lowers
the dissolved oxygen levels in their vicinity.
*Below the floating houses a hypoxic area is created and oxygen is
transferred laterally by the adjacent water column. This lowers the
dissolved oxygen levels in their vicinity.
*Wind tunnel effect is produced by the floating houses increasing the
turbulence of the water. This increases the mixing in the water column
which reduces the dissolved oxygen vertical gradient.
Research question

5. 1/21/20155
• Many quantities
• Turbidity
• Temperature
• Dissolved Oxygen
• pH
• Electro conductivity
• Nutrient Loads
• Many interactions
• Biological
• Chemical
• Physical
Research Context: Water Quality

6. Research method
• Literature review
• Inventarisation
• Field visits
• Surveys
• Workshops
• First Measurements
•Several case studies
•Case 1: Delft
•Case 2: Groningen
•Case 3: Amsterdam
•Case 4: Utrecht
•Case 5: …. Model
• Output
•Report on detailed research
•Tool for international knowledge exchange
•….

7. Research method

8. 1/21/20158
Numerical modelling: Oxygen
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max 0( , , )T
P G I SD z Chla  
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 . . . .( ) ( )s a D O sat D OF k w C T C 
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2
T
rs rsR k Chla
YCHO
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
 20T
b bD k BOD 
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 201 T
b sS S
H
  
  
 
Research method

9. Meten (continue F=5min):
- zuurstofgehalte
- temperatuur
- waterstanden
Why continue measurements?
OTD6 waterstand/zuurstof/temperatuur in Heeg
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datum
waterstand[cm+NAP]
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temperatuur[C],zuurstof[mg/l]
waterpeil
temperatuur
zuurstof
bem 651 temperatuur
bem 651 zuurstof
Waterquality is dynamic in time and depth

10. 10
Research| Water quality/ecological impact floating structure

11. Method: Water Quality Measurements

12. 12
Research| Results

13. 13
Research| Results

14. 14
Research| Results

15. Overzichtsfilmpje
• https://www.youtube.com/watch?v=pWfeBo33EQU
Presentaties
– Drijvend bouwen en waterkwaliteit. Presentatie bij startbijeenkomst. Floris
Boogaard, Rutger de Graaf en Miguel Dionisio. Tauw Utrecht, 21 januari
2014
– Drijvend bouwen en waterkwaliteit, workshop met bouwers. Floris
Boogaard, Rutger de Graaf en Miguel Dionisio. Deltares, Utrecht. 20 mei
2014.
– Workshop presentation. Tijdens internationale conferentie Deltas in times
of climate change 2, 25 september 2014,
http://www.youtube.com/watch?v=x9JoF7_Dw-o&feature=youtu.be
– Poster presentation Workshop presentation. Tijdens internationale
conferentie Deltas in times of climate change 2, 25 september 2014
– Presentatie DeltaSync Academy, 5 September 2014
Collegereeks
– Webinar SKB. Online college waterkwaliteit en drijvend bouwen, dinsdag 7
oktober van 16.00 - 17.00 uur: deel 1, dinsdag 4 november van 16.00 -
17.00 uur: deel 2. http://www.skbodem.nl/actueel/agenda/160
Deel 1: http://www.youtube.com/watch?v=sy98ERWNGE8
Deel 2: https://www.youtube.com/watch?v=hnGMGz5VRes
15
Research| Results

16. Publicaties
– Vakpublicatie. Land en Water. Mei 2014.
http://repository.tudelft.nl/assets/uuid:e4421e2e-613a-4b16-8044-
a1f4329d74b0/305156.pdf
– Abstract Effects of floating urban development on water quality and ecology.
Internationale conferentie Deltas in times of climate change 2.
– Poster Effects of floating urban development on water quality and ecology.
Internationale conferentie Deltas in times of climate change 2
Rapportages
– Literatuuronderzoek, Miguel Dionisio, Deltares
– Foka, E. (2014) Water Quality Impact of Floating Houses’ MSc thesis TU Delft.
repository.tudelft.nl/view/ir/uuid%3A1917ffa4-15ac-4c37-8be0-
af706f2bc25e/
– Rapportage IJburg, HvA (gereed)
– Lima, R.P. en V. Sazonov(2015) DeltaSync Report Water Quality
Measurements.
Pers
– Interview RTV Noord Floris Boogaard, september 2014
http://www.rtvnoord.nl/gemist/videogemist.asp?v=30991
– Interview CoBouw September 2014
http://www.cobouw.nl/nieuws/algemeen/2014/09/11/onderzoek-nodig-
naar-kwaliteit-van-water-onder-drijvende-constructies
16
Research| Results

17. 17
Research| Results on www.climatescan.nl

18.  New Company
 Dynamic Monitoring of water quality and ecology
 Upscaling: floating structures other applications e.g.:
 Ecological measures
 Quay walls and structures
 Inspection
 Improving the drone and further research
Next steps

19. For more information:
DeltaSync
Dr. ir. Rutger de Graaf-van Dinther
T: +31 152561872
E: rutger@deltasync.nl
www.deltasync.nl
www.blue21.org
http://kenniscentrumrdm.hr.nl/nl/kenniscentrum/lectoren/Rutger-de-Graaf/