Portal:Rivers

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The Rivers Portal

Introduction

A small boat (pirogue) running on the Mekong River as the sun is setting between Don Det and Don Khon, Laos.
A boat floats on the Mekong, in Laos

A river is a natural freshwater stream 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 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 and merge in confluences to form drainage basins, areas where all water eventually flows to a common outlet. Rivers have a great effect on the landscape around them. They may regularly overflow their banks and flood the surrounding area, spreading nutrients to the surrounding area. Sediment or alluvium carried by rivers shapes the landscape around it, forming deltas and islands where the flow slows down. Rivers rarely run in a straight line, instead, they bend or meander; the locations of a river's banks can change frequently. Rivers get their alluvium from erosion, which carves rock 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...)

Minnehaha Falls, June 2017

Minnehaha Park is a city park in Minneapolis, Minnesota, United States, and home to Minnehaha Falls and the lower reaches of Minnehaha Creek. Officially named Minnehaha Regional Park, it is part of the Minneapolis Park and Recreation Board system and lies within the Mississippi National River and Recreation Area, a unit of the National Park Service. The park was designed by landscape architect Horace W.S. Cleveland in 1883 as part of the Grand Rounds Scenic Byway system, and was part of the popular steamboat Upper Mississippi River "Fashionable Tour" in the 1800s.

The park preserves historic sites that illustrate transportation, pioneering, and architectural themes. Preserved structures include the Minnehaha Princess Station, a Victorian train depot built in the 1870s; the John H. Stevens House, built in 1849 and moved to the park from its original location in 1896, utilizing horses and 10,000 school children; and the Longfellow House, a house built to resemble the Henry Wadsworth Longfellow's house in Cambridge, Massachusetts. The park was listed on the National Register of Historic Places in 1969 as the Minnehaha Historic District in recognition of its state-level significance in architecture, commerce, conservation, literature, transportation, and urban planning. (Full article...)
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Briksdalsbreen
Briksdalsbreen

Briksdalselva River and the Briksdal glacier in Norway

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