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Water Portal / Rainwater Harvesting / Groundwater recharge / Permeable rock dams

5 bytes added, 23:15, 23 September 2013

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[[Image:perm rock dam icon.png|right|80px]]

[[Image:PermeableRockDam2.JPG|thumb|right|200px|Permeable rock dam, flowing. Photo: [http://il.water.usgs.gov/asian_carp/images/IM_Canal/3-Illinois%20and%20Michigan%20Canal%20Flow%20Barrier_recent.JPG USGS.]]]

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