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Water

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  198k v. 1 Nov 6, 2012, 8:28 PM Amy Nelson
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The results of this study suggest that polyacrylamide can degrade to acrylamide under environmental conditions. Acrylamide could be detected by Day 2 in soil columns of sandy clay, and Kohola silt loam.  May 5, 2013, 10:52 AM Amy Nelson
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  669k v. 1 Nov 6, 2012, 8:32 PM Amy Nelson
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When hydrogels break down, they release potassium acrylate and acrylamide. Acrylamide is a lethal neurotoxin and has been found to cause cancer in laboratory animals. It readily passes through the skin and can be inhaled as dust.  May 5, 2013, 11:15 AM Amy Nelson
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"Sustainable use of water resources requires balancing the use of the resource among competing uses, including environmental uses."  Nov 19, 2012, 5:00 AM Amy Nelson
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  191k v. 1 Nov 7, 2012, 11:26 AM Amy Nelson
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Describes the practice of using polymers to settle out or remove suspended sediment from water within sediment control structures. "The use of cationic polyacrylamide shall be avoided where there is danger of impacting aquatic organisms because its toxicity to aquatic test species occurs at very low concentrations."  Jan 12, 2013, 5:13 PM Amy Nelson
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  308k v. 2 Nov 6, 2012, 8:44 PM Amy Nelson
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  594k v. 2 Aug 16, 2013, 2:17 AM Amy Nelson
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  128k v. 2 Nov 6, 2012, 8:44 PM Amy Nelson
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  388k v. 2 Nov 6, 2012, 8:44 PM Amy Nelson
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  140k v. 2 Nov 6, 2012, 8:56 PM Amy Nelson
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  703k v. 2 Nov 6, 2012, 8:44 PM Amy Nelson
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  142k v. 2 Nov 6, 2012, 8:44 PM Amy Nelson
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  505k v. 3 Jan 8, 2013, 8:46 AM Amy Nelson
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  836k v. 2 Nov 6, 2012, 8:44 PM Amy Nelson
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  1640k v. 2 Nov 6, 2012, 8:48 PM Amy Nelson
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  702k v. 2 Nov 6, 2012, 8:48 PM Amy Nelson
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  568k v. 2 Nov 6, 2012, 8:48 PM Amy Nelson
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  664k v. 2 Nov 6, 2012, 8:48 PM Amy Nelson
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  326k v. 2 Nov 6, 2012, 9:00 PM Amy Nelson
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  37k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson
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  122k v. 2 Nov 6, 2012, 8:58 PM Amy Nelson
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  339k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson
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Discusses, in part, the complex water table, karst and confined conditions of southeastern Minnesota. Illustrates relationship to Jordan sandstone layer.  Jan 12, 2013, 4:34 PM Amy Nelson
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High ground-water pumping rates in western Kansas caused perennial streams to disappear and the High Plains aquifer to decrease 200' (more than 50% of the aquifer thickness in some places). The same thing is starting to be seen in MN.  Nov 19, 2012, 5:47 AM Amy Nelson
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We are in Area 3: "Karst common; springs and cold-water streams depend on ground-water discharge; overpumping ground water may deplete surface waters dependent on ground water"  Nov 19, 2012, 5:47 AM Amy Nelson
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This study examines available spatial data to determine its relationship to water quality and safety for the built environment along the Mississippi River Valley, throughout Goodhue and Wabasha Counties where the St. Lawrence Formation is exposed near the base of the bluffs.  Jan 12, 2013, 4:42 PM Amy Nelson
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  534k v. 2 Dec 11, 2012, 1:45 PM Amy Nelson
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  80k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson
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"When limestone quarries are dewatered to allow mining below the water table, they alter groundwater levels and flow direction. In essence, the quarries become huge wells. Ground-water levels were found to have dropped up to 70 ft; this lowering of the ground-water levels can affect wells on neighboring properties and surface-water bodies. New quarries that will extract material below the water table will have to be sited carefully to avoid this impact, or a plan must be developed to provide an alternative water supply for property owners whose wells are affected."  Nov 19, 2012, 5:47 AM Amy Nelson
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  119k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson
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  113k v. 2 Nov 9, 2012, 7:44 AM Amy Nelson
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  289k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson
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  277k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson
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- Deeper aquifers in metropolitan areas used for water supply continue to decline over time. - In some areas the reliability of deep aquifers for water supply in the future may be limited if the declining trend continues.  Nov 19, 2012, 5:47 AM Amy Nelson
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  88k v. 2 Nov 6, 2012, 8:46 PM Amy Nelson