
Fresh Water Sources

by Science Photo Library
Title
Fresh Water Sources
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Fresh water sources. Cutaway illustration of sources of fresh water use by humans, mostly living in cities (far left). Fresh water falls as rain and snow over mountains (upper right). Around 1 percent enters lakes and rivers, and is harnessed by dams, reservoirs and irrigation canals (centre and lower left). 69 percent is locked in ice (top right) and the remaining 30 percent is groundwater (shown in cutaway at lower left), extracted by deep wells for agriculture. Groundwater is used during droughts, but overuse means that reserves are shrinking. Dashed cloud outlines show predicted precipitation changes (more rain and less snow) as the Earth's climate warms.
Uploaded
June 28th, 2016
Embed
Share
Similar Subjects
Comments
There are no comments for Fresh Water Sources. Click here to post the first comment.