Though non usually accepted, a select few regions of the United States define the pool as a water by using a expanse of less than Tenner estate (40,000 m²).

Usually, the pool has there is no surface outflow draining off h2o & pool come typically spring-fed. Hence, due to the closed environment of pool, such little bodies of a river commonly developed self contained eco-systems. Pool within heavy vegetated areas too display a formation of "scum", which is a most common term for dead & decaying vegetation condensing on the water skin of the pool. The contributor to this is the presence of algae, which multiplies quickly in the nutrient-rich pool studied to heavy daylight. Decaying flora provide important numbers of such food.

Within medieval times in Europe, it was typical for several monasteries, castles, etc., to have fish pool. Which are actually however popular in the Far East (notably Japan), where koi carp may be saved.

A term is too utilized for irregular accumulation of water supply from either runoff (ponded a lake).

Watch as well: garden pool (watch water garden), engineered coarse of action features (understand treatment pond), and field units inside agriculture (for example, "pondfields" for rice or taro culture) and aquaculture.

There are various regional list for naturally occurring pool, e.g. around Scotland, one of the terms is lochan.

A word "pond" is occasionally as well wont to refer to the Atlantic Ocean in the expression "across the pond" (the studied idiomatic understatement).