I have posted about Haweswater several times in the last few months so I was interested to find this novel in the school library, by a Cumbrian author. It is set in the old hamlet of Mardale, which didn't quite emerge from the water this year, at the time Manchester Corporation were deciding to start building the reservoir. On page 50, it is suggested that the volume of the new reservoir will be twenty thousand million gallons. Now there are 0.004546 cubic metres in 1 gallon, which means the figure in the book equates to 90,920,000 cubic metres. Wikipedia gives a volume of 76,600,000 cubic metres
http://en.wikipedia.org/wiki/Haweswater_Reservoir so the current stated volume may be less than originally envisaged. It also states that the volume is the same as 62,100 acre.ft. What a wonderful unit! An acre is about half a football pitch so it is a very wide and not very deep volume. In August I estimated that the reservoir was down by about 6 million cubic metres. That's not far off 10% of the stated volume so perhaps not a bad estimate
http://www.wigtonphysics.blogspot.co.uk/2014/07/will-mardale-appear-from-haweswater.html Finally Wikipedia has introduced me to a concept called "residence time": the length of time it takes a water molecule to pass through the reservoir. This is 500 days. Nearly teo years...
