AVERAGE RESIDENCE TIMES FOR WATER IN THE EARTH SYSTEM
Atmosphere - 10 to 12 days
Terrestrial Water
Rivers - 2 Weeks
Lakes - 10 Weeks
Soil - 2 to 50 weeks
Ground Water - 1 to 10000 years
Oceans - 3600 years
Polar Ice - 15000 years
RETURN TO FUNDAMENTAL CONCEPT 4