Stream pool

A stream pool in Maui.

A stream pool, in hydrology, is a stretch of a river or stream in which the water depth is above average and the water velocity is quite below average.^[1]

Formation

A stream pool may be bedded with sediment or armoured with gravel, and in some cases the pool formations may have been formed as basins in exposed bedrock formations. Plunge pools, or plunge basins, are stream pools formed by the action of waterfalls.

Habitat

This portion of a stream often provides a specialized aquatic ecosystem habitat for organisms that have difficulty feeding or navigating in swifter reaches of the stream, or in seasonally warmer water. Such pools can be important for juvenile fish habitat, especially where many streams reach high summer temperatures and very low-flow dry season characteristics.

See also

• Reach (geography)
• Riffle
• Stream gradient
• List of waterfalls by flow rate
• List of waterfalls by type

Notes

External links

• USGS: Stream Modeling website

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Ponds, pools and puddles
Ponds	Ash pond Balancing lake Ballast pond Beel Cooling pond Detention pond Dew pond Evaporation pond Facultative lagoon Garden pond Ice pond Immersion pond Kettle pond Log pond Melt pond Mill pond Raceway pond Retention pond Sag pond Salt evaporation pond Sediment pond Settling pond Solar pond Stabilization pond Stepwell Stew pond Stormwater management pond Polishing pond Tailings Tarn Treatment pond Waste pond
Pools	Anchialine pool Brine pool Natural pool Plunge pool Reflecting pool Spent fuel pool Stream pool Swimming pool Tide pool Vernal pool
Puddles	Bird bath Coffee ring effect Puddle Puddles on a surface Seep puddle
Biota	Beaver dam Duck pond Fish pond Goldfish pond Koi pond
Ecosystems	Freshwater ecosystem Lake ecosystem Lentic ecosystem Aquatic ecosystem
Related topics	Aerated pond Bakki shower Big fish–little pond Body of water Full pond Hydric soil Phytotelma Water aeration Pond of Abundance Pond liner Ponding Puddle (M C Escher) Spring Swimming hole Water garden Water Lilies (Monet) Water well