My teacher says deposition is going to be a vital part of the test. Occasionally, a river will have insufficient energy to carry along it's load anymore, this is called deposition! The heavier traction load will deposit first because it requires the most energy and the solution load will deposit last because it requires the least energy!
What's next? Let's start simple! A flood plain for example is an generally flat piece of land adjacent to a river formed by the heavy materials carried onto the flood plain by floods, light materials are also carried but sink formin piles parallel to the river called levees! Lets do the gradient! The gradient of a river is the steepness of the slope it flows over. A waterfall would have a high gradient while a rapid would have a low gradient. You ever hear about distributaries? A distributary, or a distributary channel, is a stream that branches off and flows away from a main river channel. They are a common feature of river deltas. The opposite of a distributary is a tributary, which is a separate river channel that feeds off into another river!
Earlier we talked about meander river channels, this type of river channel can form an oxbow lake! An oxbow lake is a U-shaped lake that forms when a wide meander from the main stem of a river is cut off, creating a free-standing body of water. This landform is so named for its distinctive curved shape, which resembles the bow pin of an oxbow. another thing that can happen is that a flood connects two sides of a meander channel and so the water flows through the shortcut and the original channel becomes an oxbow lake!
Shortcut which is now main river channel
As we are talking about meanders again I can talk about Helical flow, which is the way water flows in a meander. Here is an example!
Here is how it would look in the river
Slip off slope
The last thing we are going to learn about river's before my test are delta's! Delta's are the end of the river and usually divide into many channels before reaching the ocean, they are formed by the it's load eventually depositing creating many little islands! There is not only one type of delta's, in fact here are three examples of three different types of delta's
1. Birdfoot delta
2. Estuarine delta
3. Mega delta
The birdfoot delta has apprehended it's name due to it's resemblence to a bird's foot, quite simple right! The Missisipi has a birfoot delta!
Eg the seine in france, this type of delta has a river that empties into a long, narrow estuary that eventually becomes filled with sediment (inside the coastline).
Mega delta's are very large Asian delta's, eg Yangtze.
Thank you all for helping me with my test, I really needed it!! I'm almost late, I better get going to school for my test, luckily i ran back just in time! With all I have learned I won't even break a sweat, You will see me at the next Olympics! Bye!!!
YEEEEEESSSSSS, I passed and it's all thanks to you guys. Thank you for helping me. See you in Qatar