If Grand Coulee reservoir has a volume of 8.8x109 m, and an inflow of 3300 ms , then the residence time is about... 1 day 31 hours 8 days 31 days O900 days Question 8 1.5 pts On the surface of the earth, there are almost 1.4x105 tons of liquid water for every person. This seems like a lot of water, yet the United Nations states that the earth faces a "severe water shortage". Give three reasons why knowledge of the total water storage (1.4x1015 tons/person) tells us little about the availability of useful water resources to the human population (A sentence or two for each is sufficient). Edit View Insert Format Tools Table