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MODFLOW grid for simulations used to evaluate the potential effect of Lower Floridan aquifer groundwater pumpage on the Upper Floridan aquifer at Barbour Pointe community in Chatham County, Georgia A revised regional groundwater-flow model using a modified grid in conjunction with USGS MODFLOW-2000 was developed to the predict the effects of Lower Floridan aquifer (LFA) groundwater pumpage on the Upper Floridan aquifer (UFA) in the Barbour Pointe community, Chatham County, Georgia. The model was modified using hydrogeologic information obtained from field investigations at Barbour Pointe, Berwick Plantation near Berwick, Pooler, Hunter Army Airfield, Rincon, and Fort Stewart. Types: Citation; Tags: Florida, Floridan aquifer system, Georgia, MODFLOW-2000, South Carolina, All tags... USGS Science Data Catalog (SDC), USGS publication series, United States, Water Resources, aquifer, geoscientificInformation, groundwater, groundwater flow, hydrogeology, mathematical modeling, water resources, Fewer tags Glaciation and regional groundwater flow in the Fennoscandian shield Regional-scale groundwater flow modeling of the Fennoscandian shield suggests that groundwater flow can be strongly affected by future climate change and glaciation. We considered variable-density groundwater flow in a 1500-km-long and approximately 10-km-deep cross-section through southern Sweden. Groundwater flow and shield brine transport in the cross-sectional model were analyzed under projected surface conditions for the next 140 ka. Simulations suggest that blockage of recharge and discharge by low-permeability permafrost or cold-based ice causes sinking of brine and consequent freshening of near-surface water in areas of natural discharge. Although recharge of basal meltwater is limited by the requirement... Categories: Publication; Types: Citation; Tags: Groundwater flow, glaciation, numerical modeling Data set used to develop a conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities This USGS data release contains 2013 streamflow, baseflow, and precipitation data from three hydrologically-diverse streams in the United States used to develop a conceptual framework for effectively anticipating water-quality changes resulting from changes in agricultural activities. The framework combined generalized concepts on the movement of water, the environmental behavior of chemicals and eroded soil, and the designed functions of various agricultural activities. The framework addresses the impacts on water quality of a broad range of agricultural chemicals and sediment across a variety of hydrologic settings. • Chesterville Branch near Crumpton, Maryland, (USGS site ID - 01493112) had substantial baseflow... Categories: Data; Types: Citation; Tags: Indiana, Kansas, Maryland, National Water Quality Program, USGS Science Data Catalog (SDC), All tags... agricultural management practices, agriculture, base flow, baseflow, chemical sorptivity, chemical transformation, chemical transport, flowpath, groundwater, groundwater flow, groundwater quality, hydrologic transit times, sediment transport, sorption, water chemistry, water quality, Fewer tags Geochemical data supporting analysis of geochemical conditions and nitrogen transport in nearshore groundwater and the subterranean estuary at a Cape Cod embayment, East Falmouth, Massachusetts, 2013 This data release provides analytical and other data in support of an analysis of nitrogen transport and transformation in groundwater and in a subterranean estuary in the Eel River and onshore locations on the Seacoast Shores peninsula, Falmouth, Massachusetts. The analysis is described in U.S. Geological Survey Scientific Investigations Report 2018-5095 by Colman and others (2018). This data release is structured as a set of comma-separated values (CSV) files, each of which contains data columns for laboratory (if applicable), USGS Site Name, date sampled, time sampled, and columns of specific analytical and(or) other data. The .csv data files have the same number of rows and each row in each .csv file corresponds... Categories: Data; Types: Citation; Tags: Cape Cod, Massachusetts, Eel River, Massachusetts, Hydrogeology, Sea Coast Shores, East Falmouth, Massachusetts, USGS Science Data Catalog (SDC), All tags... Water Resources, biogeochemical cycling, geochemical processes, groundwater flow, groundwater level, groundwater quality, nutrient cycling, Fewer tags Glaciation and regional groundwater flow in the Fennoscandian shield Regional-scale groundwater flow modeling of the Fennoscandian shield suggests that groundwater flow can be strongly affected by future climate change and glaciation. We considered variable-density groundwater flow in a 1500-km-long and approximately 10-km-deep cross-section through southern Sweden. Groundwater flow and shield brine transport in the cross-sectional model were analyzed under projected surface conditions for the next 140 ka. Simulations suggest that blockage of recharge and discharge by low-permeability permafrost or cold-based ice causes sinking of brine and consequent freshening of near-surface water in areas of natural discharge. Although recharge of basal meltwater is limited by the requirement... Categories: Publication; Types: Citation; Tags: Groundwater flow, glaciation, numerical modeling