Explain (AO2) the concept of maximum sustainable yield of freshwater in terms of a balance between inputs and outputs.
Define the terms below using your 'IB Geography. Course Book' by Cooke and Nagle, the command term posters in the classroom and the links below.
The tables below give data for the climatic conditions of the UK. The first table gives data for the evaporation rates in the UK for 2010, 2011 and 2012. The second illustrates the average climatic conditions for the UK between the years 1981 and 2010. The data for the second table has been taken from the UK Met Office.
Climatic Data for the UK 1981-2010
Suggest why an understanding of the water balance is important when discussing sustainable yields. (4 marks)