Stream pool

. In hydrology, a stream pool is a stretch of a river or stream in which the water depth is above average and the water velocity is below average.

.]] In hydrology, a stream pool is a stretch of a river or stream in which the water depth is above average and the water velocity is below average. ==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 fish habitat, especially where many streams reach high summer temperatures and very low-flow dry season characteristics. In warm and arid regions, the stratification of stream pools provide cooler water for fish that prefer low water temperatures, such as the redband trout (Oncorhynchus mykiss) in the Western United States. Mosquito larvae, which prefer still and often stagnant water, can be found in stream pools due to the low water velocity. ==See also== Pond 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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