4 articles
Pond
Pond: a small, shallow standing waterbody (<5 ha, <5 m, <30% emergent vegetation per a 2022 definition), distinct from lakes and wetlands; globally abundant, biodiverse, and often human-made for farming, stormwater, or swimming.
Salt pond
Salt pond: a shallow saline pond, natural or levee-enclosed (also called salt pan, saltern), where evaporation concentrates brine for salt harvesting; famous examples include San Francisco Bay's Cargill ponds and Maras, Peru.
Vernal pool
Vernal pool: a small seasonal wetland that ponds in winter and spring and dries in summer, held by bedrock or hard clay; fish-free breeding habitat for fairy shrimp and amphibians, with over 90% of California's pools lost.
Walden Pond
Walden Pond, Concord, Massachusetts: glacial kettle lake, deepest in Massachusetts, no inlet or outlet, 24.88 ha. Henry David Thoreau lived there 1845-1847 and wrote Walden; now a DCR state reservation and National Historical and Literary Landmark.