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With increased development the percent of land surface considered impermeable increases. Impermeable surfaces include pavement, sidewalks, rooftops, and to some extent compacted soils. In ultra-urban settings there is almost no deep infiltration, with most water running off or eventually evaporating from locations where surface water pools.

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current20:43, 11 March 2014Thumbnail for version as of 20:43, 11 March 2014660 × 450 (40 KB)Mtrojan (talk | contribs)

This page was last edited on 18 August 2015, at 14:10.


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