In the 1960s, we realised that the Ley was becoming increasingly eutrophic (enriched by nutrients leading to algal blooms). To gauge water, sediment and nutrient inputs into the lake, we started taking measurements in the river catchments feeding Slapton Ley in late 1969. Ever since we have continued doing this weekly water sampling programme. This long-term study has been supplemented by a number of research projects.
The data is available on request from the Centre for academic study.