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Over many years, the rocks in the river are shaped by the natural forces in the river to create the rounded, smooth rocks you see today. This process is known as weathering, and there are several contributing factors at play in the river that make it work. Most of the shaping is done through the process of abrasion, and it is complemented by ...
A river is divided up into three sections called courses. There is the upper, middle and a lower course. A river starts in the upper course, usually an elevated section of land such as a mountain ...
- Anatomy of a River. No two rivers are exactly alike. Yet all rivers have certain features in common and go through similar stages as they age. The beginning of a river is called its source or headwater s. The source may be a melting glacier, such as the Gangotri Glacier, the source of the Ganges River in Asia.
- Rivers Through History. Rivers have always been important to people. In prehistoric times, people settled along the banks of rivers, where they found fish to eat and water for drinking, cooking, and bathing.
- Rivers of Asia. Asia’s longest and most important river is the Yangtze, in China. It flows from the Dangla Mountains, between Tibet and China’s Qinghai province.
- Rivers of South America. The strength of the Amazon River in South America dwarf s all other rivers on the planet. The amount of water flowing through the Amazon is greater than the amount carried by the Mississippi, the Yangtze, and the Nile combined.
The runoff or storm flow is the water that arrives in the river via surface runoff or rapid throughflow through the rock. The rising limb gives an indication of how fast water is reaching the channel and represents the level of water rising in the channel. The steeper the rising limb the more likely a flood is to occur, this is vital knowledge ...
The processes of river erosion operate here. Hydraulic action - where the sheer force of the water erodes the stones, bed and banks of the river. Corrasion - where stone sin transport are thrown into the bed and the banks eroding them. Corrosion - where weak acids within the water react with the rocks and bed and bank of the river
River Stages. Any river is made up of three sections: the upper course, middle course and lower course. The shape of the river changes for each section of the river (these are explained in more detail later on in these notes): Source: BBC. Upper Course - The river starts as many tributaries which are narrow and v-shaped.
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Why do rivers have rounded rocks?
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As the water runs downhill, it cuts into the soil, forming channels called gullies. When gullies reach a low-lying area, they merge together, forming a larger stream. Streams merge together to form larger streams or rivers. Most sediment carried downhill eventually ends up in a stream and is carried away.
