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Unformatted text preview: • abundance not a problem • distribution in space and over time is problem • supply vs use - problem Global Water Supply • oceans = 97.2%, residence = thousands of years • atmosphere = .001%, 9 days • rivers/streams - .0001%, 2 weeks • groundwater = .31%, hundreds to thousands of years • lakes = .009%, tens of years • ice caps/glaciers = 2.15%, up to tens of thousands of years+ Surface Water • surface runoff to streams • drainage network • drainage basin or watershed • drainage divide • stream order and size of drainage basin...
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This note was uploaded on 11/19/2011 for the course GEOL 1011 taught by Professor Brown during the Fall '11 term at GWU.
- Fall '11