B

Question 1

Base flow

Answer 1

the water flowing in a stream that is fed only by groundwater; during dry periods is is only that bas flow that passes through the stream channel

Question 2

Base level

Answer 2

the lowest point to which a river can flow; sea level is usually the base level for large rivers but a large river is often the base level for its tributary streams

Question 3

Bedload

Answer 3

particles that are transported by water along a riverbed

Question 4

Bird’s foot delta

Answer 4

a delta where the river splits off into ‘fingers’ that jut out into the sea, like a bird’s foot. e.g the Mississippi Delta, USA.

Question 5

Buff

Answer 5

the slightly raised line that marks the edge of a floodplain