River Habitat Surveys
Good water quality is essential for a healthy river - monitoring what runs into the river, and surveying what lives in it, provides invaluable data on its current status.
For example, during the first two weeks of October, following the serious pollution incident in July 2013, a team of Imperial College scientists, EA Fisheries officers and volunteers from ARK took part in electrofishing to find out more about the impact of the Chlorpyrifos pollution on the fish populations. Electrofishing stuns fish for just long enough to weigh and measure them. The scientists also washed out the stomach contents of some of the fish to see what they have been eating in place of their usual diet of shrimps and riverfly.