The drinking water in Boston comes from the Quabbin Reservoir. This water is pumped across Massachusetts to provide clean drinking water to the population of Boston. A
ssume the average precipitation in New England is 130 cm/year and that the volume of the Reservoir is 1.5 x 1012 liters. Assume the watershed draining into the Quabbin has an area of 100 km2.
What is the residence time of water in the Reservoir with respect to rain?