25: Erosion and Deposition on a Meander s2

Name ______PS/ES Per.____

Date ______Mr. Landsman

1. Erosion and deposition on a meander

Using the diagram above, complete the following questions:

1) Draw an arrow and label the outside bend of a meander.

2) Draw an arrow and label the inside bend of a meander.

3) Draw a red dashed arrow -----> to show where you think the fastest flow of water would be found on a meander.

4) Draw an arrow and label an area where erosion might occur on one meander.

5) Why is erosion occurring on this part of the meander?

______

7) Draw an arrow and label an area where deposition might occur on one meander. 2. Formation of an oxbow lake

Flow 1) Look carefully at the photo above. Draw arrows to label the following: Hint – use your transparency marker for the arrows.

A) meander neck B) inside bend of a meander C) outside bend of a meander D) site where erosion might be occurring E) site where deposition might be occurring.

2) Look at the diagrams and the writing on the next page. They explain how an oxbow lake is formed, but they are mixed up.

Decide which piece of writing goes with which diagram. Cut out the diagrams and the writing. Paste them in the correct order on a clean page of printer paper. Include a heading. 2. Formation of an oxbow lake (cont)

The water flows around the Over time, deposits of sediment meander. Erosion occurs on build up by the backwater. The the outside bend and backwater is eventually cut off, deposition occurs on the leaving a kidney-shaped oxbow inside bend. lake behind. The water breaks across the The water is flowing the fastest neck of the meander. For a on the outside bend. Over time, short time, water flows around the meander becomes an S the backwater and across the shape. A thin strip of land called neck of the meander. a neck is created at the beginning and the end of the meander.

3) On the diagrams, label the following features:

- oxbow lake (duh) - backwater - neck of a meander

4) What do you think will happen to the oxbow lake over time? Why?

Answer on printer paper.