On July 1, 2003, Christopher Swain of Portland, Oregon, became the first person to swim the Columbia River's entire length, in an effort to raise public awareness about the river's environmental health.

Sturt continued down the remaining length of the Murray to finally reach Lake Alexandrina and the river's mouth.

The disruption of the river's natural flow, run-off from agriculture, and the introduction of pest species like the European Carp has led to serious environmental damage along the river's length and to concerns that the river will be unusably salty in the medium to long term — a serious problem given that the Murray supplies 40 % of Adelaide's domestic water.

The climate of the upper catchment area varies from humid in the western edge with the origin of the river's main stem by volume ( Río Madre de Dios, Río Beni ) to semi arid in the southernmost part with the andine headwaters of the main stem by length ( Río Caine, Río Rocha, Río Grande, Mamoré ).

The superhighways Greek National Road 1 in Greece and M1 and E75 run within the valley along the river's entire length to near Skopje.

In one of the most improbably successful voyages in known history, Orellana managed to sail the length of the Amazon, arriving at the river's mouth on 24 August 1542.

Despite the river's length and relatively large drainage area ( 308 square miles ; 798 km² ), its source is only 26 miles ( 42 km ) from its mouth, and the river drops only 350 feet ( 107 m ) from source to sea.

Austin's warm climate and the river's calm waters, nearly length and straight courses are especially popular with crew teams and clubs.

In the early 19th century, settlers found that much of the river's length in Louisiana was unnavigable because of a collection of fallen trees that formed a " Great Raft " over long.

The river's total length, including its headstreams Großer Regen and Schwarzer Regen, is 169 km.

Barge traffic travels the entire length of the Mackenzie in long " trains " of up to fifteen vessels pulled by tugboats, with the sole exception being in a few of the river's narrows, where the barges are uncoupled and towed one by one through difficult stretches.

The United States Geological Survey ( USGS ) states that a river's " length may be considered to be the distance from the mouth to the most distant headwater source ( irrespective of stream name ), or from the mouth to the headwaters of the stream commonly identified as the source stream ".

Of the river's total length,, about 58 percent is Wild and Scenic.

The river is named for the trees commonly known as " red cedar " that were prevalent and still are somewhat common near the river's source and beginning length.

Including the river's West Branch and South Branch increases the Penobscot's length to, making it the second longest river system in Maine and the longest entirely in the state.

Since the Winter War ( 1940 ), the Karelian Isthmus belongs to Russia and only 13 kilometers of the river's length remains in Finland.

Two provincial parks are located along it: the Mattawa River Waterway Provincial Park stretches along both sides of the river's banks for almost its full length ; and Samuel de Champlain Provincial Park, located about 10 km from the river's end.

The river's old-growth forests, its habitat for several species of birds, its healthy fish runs, and the recreational opportunities that it provides — such as fishing and whitewater rafting — led to the designation of more than half of the length of the river into the National Wild and Scenic Rivers System ( NWSRS ).

Approximately half of the river's length is a part of the border between these two countries.

Its total length is 138 km, about, and the total of the river's basin area spans 1. 240 km², more than.

For most of its length, the river's course defines a portion of the Wisconsin – Michigan border.

The river's length has been increased over the centuries as land has been reclaimed by draining the marshes.

Aarau is situated on the Swiss plateau, in the valley of the Aar, on the river's right bank, and at the southern foot of the Jura mountains, and is west of Zurich.

The term Columbia Basin is used to refer not only to the entire drainage basin but also to subsets of the river's full watershed, such as the relatively flat and unforested area in eastern Washington bounded by the Cascades, the Rocky Mountains, and the Blue Mountains.

The river's average discharge is approximately 188, 000 cubic feet per second ( 5, 324 m³ / s ), and the river's flow is always constant.

While it is difficult to comprehend how Vancouver missed the Fraser River, much of this river's delta was subject to flooding and summer freshet which prevented the captain from spotting any of its great channels as he sailed the entire shoreline from Point Roberts, Washington to Point Grey in 1792.

The Jordan River is short, but from its mountain headwaters ( approximately 160 kilometers north of the river's mouth at the Dead Sea ) the riverbed drops from an elevation of about 3, 000 meters above sea level to more than 400 meters below sea level.

A small section of the Tumen River is also located along the border between North Korea and the Russian Federation, technically following the river's thalweg.

In summer months the river is deep enough to permit vessels with drafts of up to three meters to reach Salto del Guairá, but seasonal and other occasional conditions severely limit the river's navigational value.

The river's average annual flow is 1, 940 cubic meters per second.

For most of the river's course, the gradient is slight.

The memory is the river's bed and what is modified by the water drops is the amount of soil on the river's bed.

Near the river's mouth, the heavily irrigated Rio Grande Valley is an important agricultural region.

Near Presidio the river's discharge is frequently zero.

For example, the magnitude of a river's current, i. e. the amount of water that flows through a cross-section of the river each second, or the amount of sunlight that lands on a patch of ground each second is also a kind of flux.

The best-known of the classical Czech composer Bedřich Smetana's set of six symphonic poems Má vlast (" My Motherland ") is called Vltava ( or The Moldau ), and is a musical depiction of the river's course through Bohemia.

* 1998: The river's history is discussed in the 1998 book King Leopold's Ghost ( by Adam Hochschild ).

Traditionally running from the river's mouth at Chepstow in Monmouthshire, to Rhayader via Newtown, Presteigne and Builth Wells, a total of 112 miles ( 181 km ) long.

Running along the Russian southern bank of the river were precipitous cliffs, high, continuing inland from the river's mouth for almost two miles ( 3 km ) where they met a less steep, but equally high hill known as Telegraph Hill across the river from the village of Bourliouk.

The river's end is marked by the Boyoma Falls, made up of seven cataracts over a stretch of 100 km between Ubundu and Kisangani.

Some 987 km < sup > 2 </ sup > of the river's floodplain and delta have been classified by BirdLife International as the Fitzroy Floodplain and Delta Important Bird Area ( IBA ).

The Grand Valley Trail stretches 275 km along the river's valley between the town of Dundalk and Lake Erie.

river's waters now drain intermittently into Taitema Lake, which is located about 160 km ( 100 mi ) southwest of Lop Nur.

For over 30 km from its mouth, the river's channel is divided by the large flat and fertile islands of Leguan ( about 28 km² ), Wakenaam ( about 44 km² ), and Hog Island ( about 60 km² ).

river's mouth while the Verkhne-Svirskaya HPP is 128 km away.

The original tract of land stretched from the mouth of the Grand River on the shores of Lake Erie to the river's head, and for 10 km ( 6 mi ) from either bank.

The most problematic for the safe navigation of ships is rapids " Bolshoy ", which is situated in 128 – 130 km from the river's mouth.

The river's old mouth into the Danube was some 40 km to the north-west, between villages of Čenta and Surduk, thus it was shorter.

According to the calculations of the Russian geographer Alexander Bazelyuk, merely 9. 1 km of the length of the West Manych river remains in its original " river " ( rather than reservoir form ): 8. 2 km from the Vesyolovsk Dam to the upper reaches of the Ust-Manych Reservoir, and 0. 9 km from the Ust-Manych Dam to the river's fall into the Don.

Near Mfuwe, the river's elevation has dropped to about 520 m, the flood plain is about 10 km wide and the valley reaches about 100 km wide, with a north-west escarpment ( Muchinga Escarpment ) about 700 m high, and a south-western escarpment about 450 m high.

The river's tidal limit is between 160 and 320 km from the sea.

The river's total length is 910 km, with approximately 427 km in China and 527 km in Vietnam.