River Invertebrate Surveys are carried out regularly by the Conservation Group.  These involve kick sampling, where 2 people take samples from varying points in the river (ie edge, middle, ripple) by kicking/disturbing the riverbed for 3 minutes, with a net positioned to catch the sample.  These surveys help determine the water quality due to the species present, measured against a biotic index, where certain species are attributed to cleaner water.