Question

Which of the following is NOT reason why a stream incises into its former floodplain to create a stream terrace?

Answer 1

Answer:

D. Lowering of the sea level.

Explanation:

• Stream incision is a cause and consequence of the increase in the river load carrying capacity and also its former floodplain if uplifted by the presence of mountain ranges and more discharge rates.

• As the streams channel drops the water in surrounding aquifers runs into the streams, thus lowering the water table a this modifies the flow pattern of the stream, and leads to large reductions of summer flows.  

• The incision is thus a play of the river with its tools and speed of the river and the amount of discharge governs the flow patterns hense,  this impacts the river way of cutting.