Skip to main content
Advanced Search

Filters: Tags: glacial aquifer (X)

5 results (11ms)   

View Results as: JSON ATOM CSV
thumbnail
This data release contains three groundwater-flow models of northeastern Wisconsin, USA, that were developed with differing levels of complexity to provide a framework for subsequent evaluations of the effects of process-based model complexity on estimates of groundwater age distributions for withdrawal wells and streams. Preliminary assessments, which focused on the effects of model complexity on simulated water levels in the glacial aquifer system, illustrate that simulation of vertical gradients using multiple model layers improves simulated heads more in relatively low-permeability units than in high-permeability units. Moreover, simulation of heterogeneous hydraulic conductivity fields in both coarse-grained...
thumbnail
This data release consists of data (in four tables) for assessing the time scales of arsenic variability in three production wells in New Hampshire; tables that describe the data fields in the data tables are also included in the data release. High-frequency (every 5 to 15 minutes) and bi-monthly water-quality monitoring of a bedrock-aquifer domestic well (425651070573701), a bedrock-aquifer public-supply well (425400070545401), and a glacial-aquifer public-supply well (425311070535801) was completed between 2014 and 2018. Concentrations of arsenic and other geochemical constituents and dissolved gases, as tracers of groundwater age, were measured on a bimonthly basis; physicochemical data, including specific conductance,...
thumbnail
Three wells in New Hampshire were sampled bimonthly over three years to evaluate the temporal variability of arsenic concentrations and groundwater age. All samples had measurable concentrations of arsenic throughout the entire sampling period and concentrations in individual wells varied, on average, by more than 7 µg/L. High arsenic concentrations (>10 µg/L) were measured in wells KFW-87 and SGW-93, consistent with the high pH and low dissolved oxygen typically found in bedrock wells. Lower arsenic concentrations (< 10 µg/L) at well SGW-65 were consistent with lower pH typical of the glacial aquifer. The well producing the oldest water, public bedrock well SGW-93, was not the well with the highest arsenic concentrations;...
thumbnail
This data release contains five groundwater particle-tracking models (MODPATH6) of northeastern Wisconsin, USA, that were developed to work with three MODFLOW models that have differing levels of complexity. The previously developed MODFLOW models (https://doi.org/10.3133/sir20175010 and https://doi.org/10.5066/F73J3B3P) were modified slightly to ensure proper functioning with MODPATH6. Modifications to the original MODFLOW models included: 1. changing IPHDRY in the UPW package so that the dry cell flag value (HDRY) was written to the binary heads (*.hds) file, 2. selecting the compact budget option to ensure proper utilization of IFACE values by MODPATH, and 3. the period length (PERLEN) was increased for one model,...
thumbnail
This dataset contains information on the degree of potential human influence near 2228 groundwater wells in the U.S. glacial aquifer system. Data include well identification number, name, latitude, longitude, potential-human-influence category, percent urban and crop land use in a 500 meter radius around each well, and measures of county-based groundwater use and irrigation. Ancillary information includes nearest appropriate streamflow gaging stations and meteorological stations, and also climate division for each well.


    map background search result map search result map Data related to the degree of potential human influence near 2228 groundwater wells in the U.S. glacial aquifer system Data for Arsenic Variability and Groundwater Age in Three Water-Supply Wells in Southeast New Hampshire Data for Time Scales of Arsenic Variability and the Role of High-Frequency Monitoring at Three Water-Supply Wells in New Hampshire, USA MODPATH6 models used to evaluate effects of complexity on groundwater age metrics in the Fox-Wolf-Peshtigo watersheds, Wisconsin MODFLOW-NWT model used to evaluate effects of complexity on head and flow calibration in the Fox-Wolf-Peshtigo watersheds, Wisconsin: U.S. Geological Survey data release. Data for Arsenic Variability and Groundwater Age in Three Water-Supply Wells in Southeast New Hampshire Data for Time Scales of Arsenic Variability and the Role of High-Frequency Monitoring at Three Water-Supply Wells in New Hampshire, USA MODPATH6 models used to evaluate effects of complexity on groundwater age metrics in the Fox-Wolf-Peshtigo watersheds, Wisconsin MODFLOW-NWT model used to evaluate effects of complexity on head and flow calibration in the Fox-Wolf-Peshtigo watersheds, Wisconsin: U.S. Geological Survey data release. Data related to the degree of potential human influence near 2228 groundwater wells in the U.S. glacial aquifer system