pool and riffle

См. также в других словарях:

• Riffle-pool sequence — In a flowing stream a riffle pool sequence develops as an area of alternating areas of relatively shallow and deeper water. Riffles describe shallow water where the flow is rippling over gravel deposits whereas pools are deeper and calmer areas.… …   Wikipedia

• Riffle — A riffle (also known as a swift) is a shallow stretch of a river or stream, where the current is above the average stream velocity and where the water forms small rippled waves as a result. It often consists of a rocky bed of gravels or other… …   Wikipedia

• Stream pool — A stream pool, in hydrology, is a stretch of a river or creek in which the water depth is above average and the stream velocity is quite low. [ [http://www.dnr.state.md.us/naturalresource/summer2004/education.html Matthew Chasse, Riffle… …   Wikipedia

• List of Barney and Friends episodes and videos — Contents 1 Episodes by season 1.1 Season one 1.2 Season two 1.3 Season three 1.4 Season four …   Wikipedia

• Upland and lowland (freshwater ecology) — In studies of the ecology of freshwater rivers, habitats are classified as upland and lowland. Upland habitats are cold, clear, rocky, fast flowing rivers in mountainous areas; lowland habitats are warm, slow flowing rivers found in relatively… …   Wikipedia

• river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …   Universalium

• Course of San Juan Creek — Map of San Juan Creek watershed San Juan Creek is a creek in Orange County in the U.S. state of California. It is about 29 miles (47 km) long, and along with its major tributary, Trabuco Creek, drains 133 square miles (340 km2) near the …   Wikipedia

• River Tillingbourne — The river is sometimes called the Tilling Bourne. The River Tillingbourne runs along the south side of the North Downs joining the River Wey at Guildford. Its source is near Tilling Springs to the north of Leith Hill at gbmapping|TQ143437 and it… …   Wikipedia

• Channel types — A wide variety of river and stream channel types exist in limnology. All these can be divided into two groups by using the water flow gradient as either low gradient channels for streams or rivers with less than two percent (2%) flow gradient, or …   Wikipedia

• Conasauga logperch — Conservation status Vulnerable (IUCN …   Wikipedia

• Tennessee Dace — Conservation status Near Threatened (IUCN 2.3) Scientific classification King …   Wikipedia