# Why is the flow of a river fastest in the lower course?

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## Why do deeper rivers flow faster?

Water flowing through a wide, deep river channel encounters less resistance than water flowing in a narrow, shallow channel, since a smaller proportion of the total water molecules will be slowed by the river’s edges. The center of the river experiences the greatest velocity.

## Is a river faster in the upper or lower course?

Upper course – The gradient is really steep but the velocity is slow moving because of the vast amount of friction. … Lower course – The gradient levels off, but the speed of the river is very fast because there is a low amount of friction acting on the river water.

## Which part of a river flows the fastest?

The current is faster at a place where the bottom of a river is steep. A place where water flows fast in a river is where the width is narrow and the bottom steep. An example of such a river would be in a gorge of the upper reaches. Usually the speed of river water is fastest in the upper reaches.

## What makes a river flow faster?

Generally a narrower, more circular river channel allows faster flow of water. Broader flat channels tend to slow a river down. 2. Smoother channels also allow faster flow of water; rougher channels slow water flow.

## What three factors affect how fast a river flows?

What three factors affect how fast a river flows and how much sediment it can erode? A river’s slope, volume of flow, and the shape of its streambed.

## Where is erosion greatest in a river?

Most river erosion happens nearer to the mouth of a river. On a river bend, the longest least sharp side has slower moving water. Here deposits build up. On the narrowest sharpest side of the bend, there is faster moving water so this side tends to erode away mostly.

## What are the 3 stages of a river?

3 Stages of a River

• YOUTHFUL STAGE (UPPER COURSE) – V- Shaped Valley > Erosion. …
• MATURE STAGE (MIDDLE COURSE) – Meanders > Erosion and Deposition.
• OLD AGE STAGE (LOWER COURSE) – Floodplains > Deposition. …
• Dangers. Flooding – Damage to property, land, animals and homes. …

## What are the 4 stages of a river?

Nearly all rivers have an upper, middle, and lower course.

• Young River – the upper course.
• Middle Aged River – the middle course.
• Old River – the lower course.

## What are the 3 courses of a river?

The river has three different “courses”, the Upper Course, Middle Course and Lower Course, each with their own different characteristics. waterfalls, interlocking spurs.

## What is the start of a river called?

Every river has a ‘source’, a place where the river begins its journey. Where is the source of a river? The source of a river is usually found in high places such as hills or mountains. A river can have more than one source.

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## What is the strongest river in the world?

Amazon River – The Most Powerful River on Earth

• The Amazon, a river in the north of South America, is the richest river in water on earth. …
• The Amazon basin contains the world’s largest rainforest area at one stretch. …
• The Amazon River, or rather its estuary, was first explored by European settlers around 1500.

## Which flows faster oil or water?

Liquids that have a LOW viscosity flow quickly (ie. water, rubbing alcohol, and vegetable oil). … Therefore, we’ve shown that corn syrup and honey have a higher viscosity (or are more viscous) than water and cooking oil.

## How do you swim in a river current?

Look downstream and keep calm, breathe with the flow of the water, to keep from swallowing too much water. When you come up on a calmer area, flip over and swim diagonally toward shore, with the flow of the current. 2. The other less popular method is to swim on your stomach, head-first downstream.

## What factors affects the strength of water current?

Waters density is affected by its temperature and salinity, or saltiness. The colder and saltier the water is, the denser and heavier it is. Cold, dense water tends to sink and flow under warmer, lighter water, creating a current.

## What affects the flow of a stream?

The flow of a stream is directly related to the amount of water moving off the watershed into the stream channel. It is affected by weather, increasing during rainstorms and decreasing during dry periods.