Question Part (a)
Summarise what the information in Table 1 tells us about (a) how the water quality of estuaries in the United Kingdom has changed from 1980 to 2005; and (b) how the water quality of estuaries varies across the constituent parts of the UK.
a)
In England and Wales the amount the water area of river estuary classed as ‘Good’ has risen from 1,870km² in 1980 to 2,038km² in 2005. This represents a rise in the percentage of rivers classed as ‘Good’ from 68% in 1980 to 73% in 2005. The total area of estuaries classed as ‘Fair’ has fallen slightly from 620km² in 1980 to 605km² in 2005 and the total percentage of estuaries classed as ‘Fair from 23% to 22%. The area of estuaries classed as ‘Poor’ has also fallen from 140km² in 1985 to 83km² in 2005. This represents a drop in percentage of estuaries classed as ‘Poor’ from 5% to 3%. The area of estuaries classed as ‘Bad’ falls from 110km² in 1980 to 48km² in 2005 with the total percentage dropping from 4% to 2% accordingly.
In Scotland records start from 1995. The area of estuaries classed as ‘Good’ rises from 619km² to 692km² and this represents a rise in the total percentage of estuaries classed as ‘Good’ from 77% to 86%. The area of estuaries classed as ‘Fair’ falls from 153km² in 1995 to 95km² in 2005 and this represents a fall in total area from 19% to 12% respectively. The area of estuaries classed as ‘Poor’ also falls from 28km² in 1995 to 22km² in 2005 however the total percentage of estuaries classed poor remains at 3% from 1995 to 2005. Estuaries classed as ‘Bad’ drop from 9km² in 1995, a 1% total, to zero.
In Northern Ireland records are only given for the years 1985 and 1993 and estuaries are classed as ‘Good’ or ‘Poor’. The area of estuaries classed as ‘Good’ rises from 100km² in 1985 to 140km² in 1993, this represents a rise from 83% to 88% of the total area. The area of estuaries classed as ‘Poor’ remains at 20km² from 1985 to 1993, this represents a fall from 17% to 12% of the total...