INDYMO

Waterboard - Delfland Surface water check, to search for possible polution sources or illicit discharges that could explain the poor water quality of the water system (very low dissolved oxygen concentration values)

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13:14:53 13:17:46 13:20:38 13:23:31 13:26:24 13:29:17

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Temperature (C) Conductivity (mS/cm)

https://www.youtube.com/watch?v=fAJn3mAfvFw

Waterboard - Delfland Inspection of a culvert in a greenhouse area to search for illicit discharges or other possible causes for suspicious water quality parameters concentrations previously measured with grab samples by the water authority. Underwater drone succeeded in entering the culvert for up to 20m.

https://www.youtube.com/watch?v=fAJn3mAfvFw

Waterboard - WaternetResearch about the ideal conditions for the presence of mussels at Sloterplas, Amsterdam. The underwater drone was used to collect water quality data (e.g. dissolved oxygen) and to collect underwater images of the mussels laying on the bed of the lake. This was performed at several different regions of the lake, and at water depths reaching over 30m. The visual data wasused to assess about the representativity of the samples collected with traditional methods.

https://www.youtube.com/watch?v=jvjokW0TFj8

Waterboard – Hunze en Aa’sWater quality measurements in lakes with high turbidity, to infer about the possible causes, which could be due to high algae concentrations, or mostly due to inorganic sediments in suspension.

https://www.youtube.com/watch?v=D4fom8HXAvE

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Averages of Turbidity (FNU)

Waterboard – Hunze en Aa’sConductivity measurements in a canal with reported salt intrusion problems. A longitudinal profile of the variation of conductivity allowed to clearly visualize the variations in the salinity along a distance of 8km from the sea (dike) until a lake.

https://www.youtube.com/watch?v=MeQ7rxXKOzo

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09:36:00 10:04:48 10:33:36 11:02:24 11:31:12 12:00:00 12:28:48

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Conductivity Profile

Down CTD

UP CTD

Waterboard - Reest en Wieden Study of the effectiveness of selected parameters in large scale filters (Wetlands / Halophyte filters / Reed filters), and their spatial variation within the filter. Insight into the underwater life.

https://www.youtube.com/watch?v=YS1t6IJqzxM

Hoogeveen – Oude Diep

Drieland (Groningen)

Groningen MunicipalityWater quality measurements nearby and underneath houseboats in the Noorderhaven, Groningen (measurements simple to perform using underwater drones). This location is of high interest due to the high coverage with the boats (over 60% covered), and due to the fact that most houseboats are not connected to the sewer..

https://www.youtube.com/watch?v=QYvWB8ybIV0

Groningen MunicipalityAssessment of the efectiveness of a fountain that was installed to stimulate the aeration of an eutrophicated pond in Groningen. For this, an underwater drone equipped with water quality sensors was used, allowing the collection of dissolved oxygen concentrations at several regions around the pond.

https://youtu.be/QYvWB8ybIV0?t=234

Urban Farming, RotterdamMonitoring of water quality parameters in tanks used to breed fish (catfish and telapia), and in the basin where vegetables are grown. Both the tanks and the basins are part of a cycle where the water is recirculated. The vegetables and algae remove the nutrients from the wastewater coming from the fish tanks, and then the purified water is pumped again to the fish tanks.

https://www.youtube.com/watch?v=REhnLbxgjJ4

Urban GreenUnderwater visual inspection of a floating garden, and water quality measurements in the surrounding water. This floating garden is an inniciative of the start-up Urban Green, and this first prototype is located at the RDM Campus, Rotterdam.

https://www.youtube.com/watch?v=AyHVVEfTLvE