✅C&W Case Study - River Tweed

Question 1

Where

Answer 1

Starts in Scotland, flows mostly in NE England. Flows East

Question 2

River Tweed length

Answer 2

156km, 2nd largest Scottish river basin

Question 3

Ecosystem

Answer 3

abundance of salmon, diverse array of other fish, so people often fish there

Question 4

Catchment area

Answer 4

5000km^2

Question 5

River basin shape and geology

Answer 5

The catchment of the river Tweed consists of a horse-shoe shaped rim (circular, flashier rising limb on hydrograph) of hills composed of older, harder rocks which surround a relatively flat basin of younger rocks covered with a thick layer of glacial boulder clay (impermeable, water can runoff).

Question 6

Land use: fishing

Answer 6

Major fishing along the whole river sometimes causes dangerous decreases in fish, requiring fishing limits from Feb to June.

Question 6

Land use: urbanisation

Answer 6

Various urban areas along the way, such as Berwick on Tweed, Peebles. Impermeable surface means more runoff, so more discharge

Question 7

Impact of heavy rainfall

Answer 7

High level of precipitation 1 week in 1948, causing the most significant flood event. Disruption to transport services by collapsing a local railway bridge. About 180 people evacuated.