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Confined (or buried) aquifers overlain by till confining units are used to supply drinking water to millions of people. Till confining units are typically conceptualized as having very low potential for transmitting water. Thus, buried aquifers are thought to be less susceptible to surface contamination, but may recharge very slowly and may be prone to unsustainable groundwater withdrawals. Quantification of the recharge (leakage) rate through till is essential to understanding the long-term sustainability of groundwater withdrawals from buried aquifers and yet few data exist on the hydraulic properties of till and groundwater flux through till. The information contained in this data release is generated from field...
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As global temperatures continue to rise, the frequency and severity of droughts in North America are expected to increase, leading to a wide range of social and ecological impacts. Identifying these impacts and the consequences for ecosystems and human communities are essential for effective drought management. Equally important is to improve the capacity of nature and people to prepare for and cope with drought by identifying management strategies that benefit both. An interdisciplinary working group within the Science for Nature and People Partnership (SNAPP) was established by the U.S. Geological Survey, The Wildlife Conservation Society, and The Nature Conservancy to synthesize our current understanding of...
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This groundwater-flow model archive contains heuristic model simulations evaluating the sustainability of groundwater withdrawals from public-water-supply wells on buried glacial aquifers. A total of 40 steady-state simulations and three transient simulations were run. The steady-state simulations were developed to assess the extent and connections between buried sand aquifers by varying three hydraulic or dimensional properties of the buried aquifer or overlying tills over a range of values observed in field sites near the cities of Akeley, Cromwell, Litchfield, and Olivia, Minnesota.


    map background search result map search result map Ecological Drought: Assessing Vulnerability and Developing Solutions for People and Nature Geochemical data, water-level data, and slug test analysis results from till confining units and confined aquifers in glacial deposits near Akeley, Cromwell, Litchfield, and Olivia, Minnesota, 2015-2018 Heuristic MODFLOW models used to evaluate the effects of pumping groundwater from confined aquifers overlain by till confining units Heuristic MODFLOW models used to evaluate the effects of pumping groundwater from confined aquifers overlain by till confining units Geochemical data, water-level data, and slug test analysis results from till confining units and confined aquifers in glacial deposits near Akeley, Cromwell, Litchfield, and Olivia, Minnesota, 2015-2018 Ecological Drought: Assessing Vulnerability and Developing Solutions for People and Nature