NationMaster - Encyclopedia: Braided river

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A braided river is one of a number of channel types and has a channel that consists of a network of small channels separated by small and often temporary islands called braid bars. Braided streams are common wherever a drastic reduction in stream gradient causes the rapid deposition of the stream's sediment load. Braided channels are also typical of river deltas and peneplains. Image File history File linksMetadata Braided_Drainage. ... Image File history File linksMetadata Braided_Drainage. ... Map of the Yukon River watershed The Yukon River is a major watercourse of northwestern North America. ... The Koyukuk River is a principal tributary of the Yukon River, approximately 500 mi (805 km) long, in northern Alaska in the United States. ... Official language(s) English Capital Juneau Largest city Anchorage Area Ranked 1st - Total 663,267 sq mi (1,717,854 kmÂ²) - Width 808 miles (1,300 km) - Length 1,479 miles (2,380 km) - % water 13. ... August 24 is the 236th day of the year in the Gregorian Calendar (237th in leap years), with 129 days remaining. ... This article is about the year. ... A wide variety of stream channels exist and these can be divided into two groups Low gradient streams (less than a couple of percent in gradient) and High gradient streams. ... In physical geography, a channel is the physical confine of a river or slough, consisting of a bed and banks. ... Stream gradient is the ratio of drop in a stream per unit distance, usually expressed as feet per mile or meters per kilometer. ... Nile River delta, as seen from Earth orbit. ... Canisteo River Valley from Pinnacle State Park The distant peaks at the same elevation represent the remnants of a peneplain that was uplifted to form the Allegheny Plateau, which is a dissected plateau in southwestern NY. In this area, the sharp relief that is seen on some of the Allegheny...

The channels and braid bars are usually highly mobile, with the river layout often changing significantly during flood events. Channels move sideways via differential velocity: On the outside of a curve, deeper, swift water picks up sediment (usually gravel or larger stones), which is re-deposited in slow-moving water on the inside of a bend. Look up flood in Wiktionary, the free dictionary. ... Gravel being unloaded from a barge Gravel is rock that is of a certain grain size range. ...

The braided channels may flow within an area defined by relatively stable banks or may occupy an entire valley floor. The Rakaia River in Canterbury, New Zealand has cut a channel 100 metres deep into the surrounding plains. FljÃ³tsdalur in East Iceland, a rather flat valley Mt. ... The Rakaia River is one of the principal rivers of the Canterbury Plains in New Zealands South Island. ... The New Zealand region of Canterbury mostly comprises the Canterbury Plains. ... (Redirected from 1e2 m) To help compare different orders of magnitude this page lists lengths between 100 m and 1 km. ... In geography, a plain is a large area of land with relatively low relief. ...

The dynamic nature and uneven terrain of braided rivers present particular challenges to bridge construction. A log bridge in the French Alps near Vallorcine. ...

The most famous example of a large braided stream in the United States is the Platte River in central and western Nebraska. The sediment of the arid Great Plains is augmented by the presence of the nearby Sandhills region north of the river. Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. ... The Platte River, showing the North Platte and South Platte The Platte River is a tributary of the Missouri River, approximately 310 mi. ... Official language(s) English Capital Lincoln Largest city Omaha Area Ranked 16th - Total 77,421 sq mi (200,520 kmÂ²) - Width 210 miles (340 km) - Length 430 miles (690 km) - % water 0. ... The Great Plains is the broad expanse of prairie which lies east of the Rocky Mountains in the United States and Canada. ... Sand Hills from space, September 2001 The Sand Hills are a 19,600 miÂ² (50,960 kmÂ²) region of mixed-grass prairie in north-central Nebraska, covering just over one-fourth of the state. ...

All the above regions contain young, eroding mountains. Official language(s) English Capital Juneau Largest city Anchorage Area Ranked 1st - Total 663,267 sq mi (1,717,854 kmÂ²) - Width 808 miles (1,300 km) - Length 1,479 miles (2,380 km) - % water 13. ... The South Island The South Island is one of the two major islands of New Zealand, the other being the North Island. ... Perspective view of the Himalaya and Mount Everest as seen from space looking south-south-east from over the Tibetan Plateau. ...