USGS Groundwater Information
USGS Groundwater Information > October 1, 2018 Highlights
USGS Monthly Groundwater News and Highlights: November 1, 2018
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Feature: Mississippi Alluvial Plain (MAP) Regional Water Availability Study
The Mississippi Alluvial Plain (MAP) has become one of the most important agricultural regions in the US, and it relies heavily on a groundwater system that is poorly understood and shows signs of substantial change. The heavy use of the available groundwater resources has resulted in significant groundwater-level declines and reductions in base flow in streams within the MAP. The USGSis conducting a regional groundwater availability study of the MAP to provide stakeholders and managers information and tools to better understand and manage groundwater resources. The study focuses on quantifying the status of the groundwater system in the MAP and determining how groundwater resources respond to development. Advanced characterization of the MAP, synthesis of field data, and numerical modeling will be used in the study as described on these web pages. Learn more about the MAP study or read about how airborne geophysical surves are being used to study MAP groundwater resources.
Figure: Map of Mississippi Alluvial Plain study area. (Source. Figure is in the public domain.)
USGS Groundwater-Related Press Releases
The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows a daily snapshot of water-level statistics in the network for October 2018. Credit: USGS. The image is in the public domain.
USGS Groundwater-Related Publications
Rebuttal to "The case of the Biscayne Bay and aquifer near Miami, Florida: density-driven flow of seawater or gravitationally driven discharge of deep saline groundwater?" by Weyer (Environ Earth Sci 2018, 77:1-16) (10/23/18)
Hydrologic characteristics and water quality of headwater streams and wetlands at the Allegheny Portage Railroad National Historic Site, Summit area, Blair and Cambria Counties, Pennsylvania, 2014-16 (10/03/18)
Simulation of groundwater flow, 1895-2010, and effects of additional groundwater withdrawals on future stream base flow in the Elkhorn and Loup River Basins, central Nebraska -- Phase three (10/02/18)
USGS Groundwater Flow and Transport Model Data Releases
Note: The following links take you to data.doi.gov
Ever wonder what it means when you hear about "artesian well water"? This is a photo of a flowing well in John Pennekamp Coral Reef State Park, Key Largo, Florida, popularly referred to as an artesian well. The term “artesian well water” tells us about the groundwater flow conditions but does not tell us anything about the quality or safety of the water for drinking. Where groundwater moves beneath a layer of clay or other dense, low-permeability material, it is effectively confined, often under pressure. The pressure in most confined aquifers, sometimes called artesian aquifers, causes the water level in a well tapping the aquifer to rise above the top of the aquifer. In a flowing well, the pressure in the aquifer raises the groundwater in the well above ground level where it can be collected for use with little or no pumping.
Credit: USGS. Photo is in the public domain. Click on photo for larger version.
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