Water Table and ErosionFormation Of Rivers

Kyle Rosbrook

Erosion - the gradual destruction or reduction and weakening of something

Gravity - the attraction due to gravitation that the Earth or another astronomical object exerts on an object on or near its surface

Channel- the course of a stream, river, canal, or other waterway

Flow - to move freely from one place to another in large numbers or amounts in a steady unbroken stream

Vocabulary

How do we determine how water flows? Rivers, streams and lakes are all formed over long periods of time where water flows consistently to create water tables.

When participation falls, some flows over the land as surface run-off, which picks up particles of clay, sand and gravel. As the water sediments travel downhill. They cut into the soil to form tiny grooves calls rills. As more participation falls, this process of erosion continues and tilled become deeper and wider, forming gullies, which act as channels for run-off.

http://www.youtube.com/watch?v=SfJ-XfPtBas&feature=related

Erosion of the Land

A river usually starts small and gradually grows larger as streams flow into it on its downward journey. It may flow over rocks or through soil. Wherever it flows, the process of erosion means it cuts deeper into the bed.

Over time it may start to change course, such as the Saskatchewan river in Cumberland House in the 1870’s

River Formation

Some rivers flow thousands of kilometers directly to the ocean, while others drain into lakes where other streams and rivers flow out.

Create a reconstruction of erosion of the land and river formation using a soil box.

To find out erosion and river building and destruction, create a waterscape in your group of three.

Create waterfall in your soil-box and add and detract variables that may affect this movement.

Simulate the slope to create a river or streams, and evaluate the erosion

These will be demonstrated to class and peer assessed.

Create a Waterscape