Residence Time. 100 gallons1 gallon/min Residence Time of Water Ice caps: 10,000 to 200,000 years Deep groundwater: 3000-10,000 years Oceans: 3000-3500.

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Presentation transcript:

Residence Time

100 gallons1 gallon/min

Residence Time of Water Ice caps: 10,000 to 200,000 years Deep groundwater: ,000 years Oceans: years Shallow groundwater: years Valley glaciers: years Fresh water lakes: years Atmosphere: 5 to 15 days Living organisms: hours to days

Residence Time of Water Evaporation from the ocean is about 0.03% of the total ocean volume (1.35 billion cubic km) per year.

Residence Time of Water Evaporation from the ocean is about 0.03% of the total ocean volume (1.35 billion cubic km) per year. About 76% of this water precipitates directly back into the ocean. The remaining 24% falls on land.

February 3

Glen Canyon dam issues Will fill with sediment 1/10-1/20 of the water soaks into the rock layers under the reservoir Evaporation from lake surface equivalent to about 1/20 of the flow of the river Water is absorbed by trees and bushes along the river– another 1/20 of the river Water leaving the reservoir is very cold– changes life below dam Recreation has changed– scenic canyon flooded with water.