NOSES (Nutrient Ongoing Scrutiny Evaluation Surveys) is a method of water sampling for nutrients that we started in 2023.
We first identified a potential increase in phosphate levels occuring in the catchment between Sarratt Bottom and Solesbridge Lane as part of our baseline assessment of River Chess water quality, using Environment Agency monitoring data.
We therefore decided to explore phosphate levels between Chenies and Rickmansworth using citizen science, and developed a method of river water sampling that could be taught on the day.
Furthermore, we wanted equipment that would enable us to process the samples on site on the day, to provide live results for anyone taking part.
Citizen scientist at work
The maps that you will see in our NOSES report: June 2023 were all created by our talented citizen scientist, Sian Hows.
This was Sian’s first project as a citizen scientist for the Smarter Water Catchment initiative, where she has brilliantly utilised skills from her career as a GIS mapping specialist.
Thank you Sian!