GroundwaterWellsWells after drawdownArtesian wellsOgallala supported agricultureOgallala AquiferSan Joaquin Valley subsidenceGroundwater purificationGroundwater purificationAgriculture sources of groundwater contaminationLandfill leachate contaminationPrimary sewage treatmentSecondary sewage treatmentSewage treatmentDrinking Water StandardsCarlsbad CavernsArecibo, Puerto Rico: Radio Telescope in SinkholeKarst drainage of manmade lake in MissouriKarst towering buttesThailand Karst TowersGroundwaterEarth Science: Ch 5—p. 140-148Supplementary Textbook Materials: Ch 16—p. 153-168WellsWells after drawdownArtesian wellsOgallala supported agricultureOgallala Aquifer• Exploited in Great Plains agriculture• Water table dropped• Recharge rate lowSan Joaquin Valley subsidenceNot able torecover dueto aquifercompactionGroundwater purificationGroundwater purificationAgriculture sources of groundwater contaminationLandfill leachate contaminationPrimary sewage treatmentSecondary sewage treatmentSewage treatmentDrinking Water StandardsCarlsbad CavernsArecibo, Puerto Rico: Radio Telescope in SinkholeKarst drainage of manmade lake in MissouriKarst towering butteshttp://en.wikipedia.org/wiki/YangshuoThailand Karst
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