Riverfly volunteers ready for another busy season on the River Torridge

A volunteer project which is keeping a close check on the health of one of North Devon's best-loved rivers is about to begin another season.

The River Torridge in North Devon is the focus of a project which has brought together 50 local volunteers whose job it is to take regular samples of its water between April to September. The samples are then analysed to look for signs of life in the shape of invertebrates - water-living mini-beasts - known as riverflies.

The work of the volunteers is providing an important regular check on the river's health. The volunteers collect their samples at points along the watercourse. Their efforts, which began in 2014, is allowing a better assessment of the Torridge's water quality and is acting as an early-warning system with which to detect pollution incidents. Data collected by the volunteers is also being shared with the Environment Agency and will help to direct future land management locally.

Izzy Moser from the charity Devon Wildlife Trust, which is overseeing the project, says:

'It's fantastic to see communities coming together to protect local streams and rivers which are so valuable to us all. Our network of volunteers is one of best Riverfly networks in the country. Last year they collected more than 290 samples, about 12% of all the national data.'

The initiative is named 'Riverfly' after the water-living invertebrates that spend a large part of their lifecycle in rivers and still waters as larvae, before emerging in their masses as short-lived adult flies. Since riverflies are very sensitive to changes in habitat and water quality, they are good biological indicators for overall river health. Riverflies are also a vital link in the aquatic and land-based food chain, providing a food source for many fish, birds, insects and mammals.

Understanding local water quality is seen as vital for the futures of protected local species such as the endangered freshwater pearl mussel. North Devon has the only remaining populations of these mussels in southern England and through the Biffa Award funded 'Restoring Freshwater Mussel Rivers in England', Devon Wildlife Trust's Izzy Moser has also been working on the River Torridge with a number of volunteers to survey and improve conditions for the aquatic animals.

2016 is the third year of the Torridge Riverfly Partnership which was set up by the North Devon Biosphere and Devon Wildlife Trust. Riverfly monitoring is a great way to get your hands dirty, enjoy nature and collect valuable data to better understand the health of the watercourse. Izzy Moser says: 'This year, we are hoping to recruit more volunteers and perhaps extend the scheme into the River Taw catchment. We are also planning to deliver a training event to support new volunteers with the survey programme. If people are interested they can contact Matt Edworthy by email at biosphere-mailbox@devon.gov.uk or by phone on 01271 388647.'

The Riverfly project has been supported with funds from the North Devon Fisheries Local Action Group and Torridge District Council.

 Riverfly volunteers taking samples from the River Torridge in 2014: