Standing Open Water and Canals

Effects and implications

• Effects of acid deposition on standing waters are largely confined to oligotrophic lakes which tend to occur in catchments underlain by lithologies (rock types) such as granites, sandstones and schists which have low weathering rates. In these systems, base cation supply from weathering may be insufficient to balance deposited acidity. Acidification is therefore rarely likely to affect mesotrophic to eutrophic lakes or canals as base cation supply is sufficient to buffer effects of acidification.