30-09-2014 Measuring water quality underneath floating structures



This research is a collaboration between Tauw, Deltares, Deltasync and various Dutch universities, water boards and municipalities. It focuses on the impacts of floating urban developments on the water quality and ecology, which are currently largely unknown. Coverage of the water surface is known to influence air-water interactions and penetration of light, but knowledge on this subject is limited. This knowledge gap complicates the job of water authorities and municipalities in creating a policy framework, and therefore to regulate and facilitate the development of new floating projects.

In order to investigate the water quality around and under floating structures, a remote-controlled underwater drone equipped with several water quality sensors and a video camera, is currently being used to go under floating structures to collect data. The sensors allow to monitor the following water quality parameters: pressure (depth), temperature, conductivity, nitrate, ammonium, dissolved oxygen and turbidity.


The extracted data provides information on how the water quality parameters vary under floating structures. To understand whether the floating body has an effect on water quality, the data is compared to parameters from the same water body, but from zones unaffected by the blockage caused by the floating structure. As an example of this methodology, the figure below shows graphs where measurements from open water are easily compared to measurements under the floating structures. The presented data was collected from the Floating Pavilion, in Rotterdam.


Click the above image to see a larger version


In addition to the data from the sensors, the underwater drone also allows to collect footage of aquatic life, which is also a good indicator of water quality.


Based on the preliminary results from this study, it seems that the current small scale floating structures do not have a significant influence on water quality. Moreover, it was understood that underwater drones are suitable to use for water quality measurements, considering that they can easily go under floating structures to collect data (expensive and troublesome to access by other methods). However, with the used equipment, there are still some challenges to overcome such as the difficulty of knowing the exact location of the drone.

All the collected data and videos from several locations around The Netherlands are available in an online tool (www.climatescan.nl), which is constantly being updated with new data. This website aims at promoting knowledge transfer among stakeholders, and to help gaining insight on the environmental impact of floating solutions.

Finally, the video in the link below gives a general impression of the project:
youtu.be/IwuELH66L_c

For the presentation given at the Deltas in Times of Climate Change conference visit the following link:
youtu.be/x9JoF7_Dw-o


16-08-2010 Congresses

In the coming months, DeltaSync will be present at a number of national and international congresses. These are:

Watercities is Transition

August 23th and 24th in AmsterdamThe topic of this congres is how do cities react op different current problems such as grow and...[more]


30-07-2010 New adress

DeltaSync has moved to a new building. The new adress is:

Molengraaffsingel 12-14

2629 JD Delft

Our phone number remains the same.[more]


01-07-2010 Winner Student competition Harnaschpolder

The entry 'Sustainable Shell' of Loed Stolte has won the competition for floating housing in the Hasnaschpolder. His entry was chosen out of the ten entries that were submitted. The design will be developed and realised by the municipality of Delft.

The other nominees...[more]


17-06-2010 Visit the Floating Pavilion

Visit the Floating Pavilion! At the National Architecture Day (Dag van de Architectuur) at June 26, 2010 the Floating Pavilion in the Rijnhaven in Rotterdam will be open to the public. Only two days after completion, the building and the exhibition on delta technology and...[more]



20-02-2008 DeltaSync newsletter 2008, nr.1

In this edition: Floating City selected as 'icon project' by Urgenda; the development of the Floating Utility Unit and disclosure of the winner of the DeltaSync New Year competition (only available in Dutch).[more]


14-12-2007 DeltaSync winning idea NCRV Klimaatshow

The 'Floating City' was selected as the winning idea in the dutch television program 'De Klimaatshow'. According to the jury, led by weatherman Erwin Kroll, DeltaSync's concept won because it can adapt to changes such as sea level rise as well as provide solutions to climate...[more]


26-11-2007 DeltaSync wins audience prize Casa Nova competition

"Water-Living-Bridge", a design for living on water, was one of the winning submissions of the design contest held by Stadsgewest Haaglanden. The focal point of the design is a bridge that connects the shores of the Poelpolder. It will be on display in the 'Floating...[more]


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