Human factors effecting the drainage basin

Question 1

How did deforestation impact the Tocantins River Basin between 1960 and 1990?

Answer 1

The Tocantins River Basin showed a 25% increase in river discharge, coinciding with increased rates of deforestation.

Question 2

What are the flood risks associated with changing land-use in the UK?

Answer 2

There is a high flood risk in many towns in the UK, including Winchester and Maidenhead in 2014, and Carlisle, York, and Manchester in 2015.

Question 3

What is the issue of over abstraction concerning London’s water supply?

Answer 3

40% of London’s water comes from chalk aquifers, and the rest is from the Thames Basin, which is home to 13 million people. Both sources are replenished by rainfall on the Marlborough Downs, the Chilterns, and the North Downs.