Author Question: What are some of the ways that human activities affect rivers? What will be an ideal ... (Read 46 times)

misspop · **on:** Jul 16, 2018

What are some of the ways that human activities affect rivers?

What will be an ideal response?

Question 2

What are terraces and what do they tell us about the past?

What will be an ideal response?

ong527 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

Dams change flow, trapping much of the sediment behind the dam and leading to erosion downstream of the dam. Loss of vegetation can lead to greater runoff and erosion of stream banks (and silting of rivers). Run off increases in hardscape areas such as cities.

Answer to Question 2

Terraces are step-and-bench landforms alongside and above a river channel. Soils on the terrace top lie on bedload deposits, revealing the presence of an ancient channel that was higher in elevation than its current position.