Portal:Rivers
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The Rivers Portal Introduction
A river is a natural stream of fresh water that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of its course if it runs out of water, or only flow during certain seasons. Rivers are regulated by the water cycle, the processes by which water moves around the Earth. Water first enters rivers through precipitation, whether from rainfall, the runoff of water down a slope, the melting of glaciers or snow, or seepage from aquifers beneath the surface of the Earth.
Rivers flow in channeled watercourses and merge in confluences to form drainage basins, areas where surface water eventually flows to a common outlet. Drainage divides keep rivers separated from other courses of water and causes upstream water within the confines of the divide to fall into the downhill stream. Rivers have a great effect on the landscape around them. They may regularly overflow their banks and flood the surrounding area, spreading nutrients to it. Sediment or alluvium carried by rivers shapes the landscape around it, forming deltas and islands where the flow slows down. Rivers seldom run a straight course, but instead meander (bend); the locations of a river's banks can change frequently. Rivers take up their alluvium by erosion of their beds, which carves rock and soil into canyons and valleys.
Rivers have sustained human and animal life for millennia, including the first human civilizations. The organisms that live around or in a river such as fish, aquatic plants, and insects have different roles, including processing organic matter and predation. Rivers have produced abundant resources for humans, including food, transportation, drinking water, and recreation. Humans have engineered rivers to prevent flooding, irrigate crops, perform work with water wheels, and produce hydroelectricity from dams. People associate rivers with life and fertility and have strong religious, political, social, and mythological attachments to them. (Full article...)
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Adams River is a tributary to the Thompson and Fraser Rivers in British Columbia, Canada. Beginning in the Monashee Mountains to the north, the Upper Adams River flows mainly southward and eventually reaches Adams Lake. The Lower Adams River begins at the southern end of the lake and flows into the extreme western end of Shuswap Lake. The river is one of the most important sockeye salmon breeding areas in North America. The run occurs in mid-October and can bring millions of fish to a concentrated area near the river mouth. Excavations of Secwepemc villages on the river have shown a long tradition of habitation and salmon fishing in the area. The river also served as an important transportation route for early logging operations in the watershed. (Full article...)
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Dordogne in Perigord, south-western France, near Castelnaud-la-Chapelle
General images -
Cascade in the Pyrénées (from River ecosystem)
This stream operating together with its environment can be thought of as forming a river ecosystem. (from River ecosystem)
A forest stream in the winter near Erzhausen, Germany (from River ecosystem)
Example of a river food web. Fungi (aquatic hyphomycetes) and Bacteria can be seen in the red box at the bottom. Fungi and bacteria (and other decomposers, like worms) decompose and recycle nutrients back to the habitat, which is shown by the light blue arrows. Without fungi and bacteria, the rest of the food web would starve, because there would not be enough nutrients for the animals higher up in the food web. The dark orange arrows show how some animals consume others in the food web. For example, crayfish may be eaten by humans. The dark blue arrows represent one complete food chain, beginning with the consumption of algae by the water flea, Daphnia, which is consumed by a gizzard shad, which is consumed by a largemouth bass, which is at the end consumed by the great blue heron. (from River ecosystem)
A whitewater canoe with yellow air bags. (from Whitewater)
Periphyton (from River ecosystem)
Rapids in Mount Robson Provincial Park (from River ecosystem)
Common water hyacinth in flower (from River ecosystem)
The cave of source of the Buna can be entered by boat and dived through a cave system serving as an effluence of the Zalomka. (from Subterranean river)
Map of the world showing elevation levels (from Upland and lowland)
Whitewater at Yosemite (from Whitewater)
The Effra is one of the subterranean rivers of London. It empties into the Thames by Vauxhall Bridge, from which this photograph was taken. (from Subterranean river)
Pondweed is an autochthonous energy source. (from River ecosystem)
Co-occurrence network of a bacterial community in a stream (from River ecosystem)
Leaf litter is an allochthonous energy source. (from River ecosystem)
A pensive Cooplacurripa River, NSW (from River ecosystem)
In Dante's Inferno, Charon ferries souls across the subterranean river Acheron. (from Subterranean river)
A subterranean river in the Cross Cave system of Slovenia. (Scale shown by people in photograph.) (from Subterranean river)
New Zealand longfin eels can weigh over 50 kilograms. (from River ecosystem)
Devil's Throat Cave subterranean river from above (from Subterranean river)
Flowing rivers can act as dispersal vectors for plant matter and invertebrates. (from River ecosystem)
Different biofilm components in streams. Principal components are algae and bacteria. (from River ecosystem)
The Puerto Princesa cave can be entered by boat. (from Subterranean river)
Rafting is a watersport where buoyancy aids, helmets and wetsuits are mandatory and often imposed by law, due to the constant risk of falling off the boat and into the rapids (from Whitewater)
Anthropogenic influences on river systems. Examples are mainly from settings with a modest technological influence, especially in the period of about 10,000 to 4000 cal yr BP. (from River ecosystem)
The brook trout is native to small streams, creeks, lakes, and spring ponds. (from River ecosystem)
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Did you know?
- ... that the River Poddle, the main water source of the city of Dublin for over 500 years, was later so polluted by industry that it allegedly killed cattle and horses drinking from it?
- ... that six different dams were proposed for the lower Sanpoil River?
- ... that radio station WWBC in Cocoa, Florida, was forced to remove its transmitter tower from the Indian River when the site was sold to condominium developers?
Related portals
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Topics
| Large-scale features | |
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| Alluvial rivers | |
| Bedrock river | |
| Bedforms | |
| Regional processes | |
| Mechanics | |
Subcategories
Quality content
 | This is a list of recognized content, updated weekly by JL-Bot (talk · contribs) (typically on Saturdays). There is no need to edit the list yourself. If an article is missing from the list, make sure it is tagged (e.g. {{WikiProject Rivers}}) or categorized correctly and wait for the next update. See WP:RECOG for configuration options. |
Featured articles
Aliso Creek (Orange County)- Balch Creek
- Big Butte Creek
- Bull Run River (Oregon)
- Chetco River
- Chimacum Creek
- Colorado River
- Columbia River
- Columbia Slough
- Dam
- Fanno Creek
- Johnson Creek (Willamette River tributary)
- Jordan River (Utah)
- Little Butte Creek
- Newaukum Creek
- Nile
- Plunketts Creek (Loyalsock Creek tributary)
- River Parrett
- Rogue River (Oregon)
- St. Johns River
- Tryon Creek
- Waterfalls in Ricketts Glen State Park
- White Deer Hole Creek
- Willamette River
Featured lists
Good articles
1886 St. Croix River log jam- Abrahams Creek
- Acelhuate River
- Adams River (British Columbia)
- Big Wapwallopen Creek
- Black Creek (Susquehanna River tributary)
- Briar Creek (Susquehanna River tributary)
- Brunswick Falls
- Buffalo Creek (West Branch Susquehanna River tributary)
- California Creek (Washington)
- Canajoharie Creek
- Catawissa Creek
- Celilo Falls
- Cem (river)
- Chollas Creek
- Cibolo Creek
- Clayton Falls Creek
- Covering of the Senne
- Darby Creek (Pennsylvania)
- Delta River
- Duwamish River
- Eddy Creek (Lackawanna River tributary)
- Esopus Creek
- Estuaries of Texas
- Everglades
- Fishing Creek (North Branch Susquehanna River tributary)
- Flushing River
- Fonteyn Kill
- Fossil Creek
- River Frome, Bristol
- Gowanus Canal
- Grande Ronde River
- Great Zab
- Hammersley Fork
- Harveys Creek
- Hudson River
- Hull Creek (Lackawanna River tributary)
- River Hull
- Hunlock Creek
- River Irwell
- Islais Creek
- Ithan Creek
- Jiloca (river)
- Kaweah River
- Kettle Creek (Pennsylvania)
- Keyser Creek
- Kings River (California)
- Kissena Creek
- Klamath River
- Kootenay River
- Kızılırmak Delta
- Laguna Canyon
- Leggetts Creek
- Little Applegate River
- Little Catawissa Creek
- Little Fishing Creek
- Little Wapwallopen Creek
- Mahanoy Creek
- Mahoning Creek (Susquehanna River tributary)
- Meadow Brook (Lackawanna River tributary)
- Merced River
- Messers Run
- Middle Fork Snoqualmie River
- Minetta Creek
- Minnehaha Park (Minneapolis)
- Missouri River
- Mosquito Creek (Washington)
- Moston Brook
- Mud Creek (Chillisquaque Creek tributary)
- Muncy Creek
- Nanticoke Creek
- Neepaulakating Creek
- Nescopeck Creek
- North Fork Snoqualmie River
- Ombla
- Petitcodiac River
- Potlatch River
- Richland Creek (Nashville, Tennessee)
- River Arun
- River Brue
- River
- River Tone
- River Torrens
- River Weaver
- Roaring Brook (Lackawanna River tributary)
- Roaring Creek (Pennsylvania)
- River Rother, East Sussex
- River Rother, West Sussex
- Salt Creek (Washington)
- Sammamish River
- San Juan Creek
- Santa Ana River
- Sava
- Saw Mill River
- Scotch Run (Catawissa Creek tributary)
- Severn bore
- Shickshinny Creek
- Shimna River
- Shinano River
- Snake River
- Solomon Creek
- South Fork Snoqualmie River
- Spring Brook (Lackawanna River tributary)
- Stafford Meadow Brook
- Stanislaus River
- Stikine River
- Stony Brook (Charles River tributary, Boston)
- Suiattle River
- Sulphur Creek (California)
- Tabaru River
- Tangascootack Creek
- Toby Creek
- Trinity River (California)
- River Trym
- Twomile Run
- Waatch River
- Wainui Falls
- Walla Walla River
- River Welland
- West Branch Fishing Creek
- West Creek (Pennsylvania)
- West Kill
- River Witham
- Yellala Falls
- Zarqa River
Things to do
- Join WikiProject Rivers
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{{Portal|Rivers}}immediately under the section header.
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