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MODFLOW-NWT adjusted inset models and general models from the regional Lake Michigan Basin Model in support of groundwater age calculations for glacial aquifers
This groundwater-flow model archive/data release contains the model input and output files for 1) edited versions of four of the five NAWQA steady- state, inset MODFLOW-NWT models of regional model of Lake Michigan Basin (https://doi.org/10.3133/sir20185038) and 2) general models simulating the same four basins as the four inset models. Two HUC8 basins in the lower peninsula of Michigan (Kalamazoo (KALA) and Boardman-Charlevoix (BOARD) basins) and two HUC8 basins in Wisconsin (Upper Fox (UFOX) and Manitowoc-Sheboygan (MANI) basins) are represented in the inset and genera-simulation models. The inset models are designed to serve as a training area for metamodels to estimate groundwater age in glacial wells. The construction and details of the original four inset models are outlined in the U.S. Geological Survey Scientific Investigations Report 2018-5038 (https://doi.org/10.3133/sir20185038), and the construction and details of the general models are outlined in the Water Resources Research journal article (https://doi.org/10.1029/2017WR021531). The original four inset models are archived in the data release at https://doi.org/10.5066/F76D5R5V. Groundwater withdrawals from wells in the original four inset models were removed in the inset models in this archive because the general models did not have wells and to be able to compare the results from the two types of models in the archive. The boundary conditions of these “pre-development” versions of the inset models were changed from constant-head boundaries (reflecting 2005 conditions) to no-flow boundaries. The general-simulation models apply an innovative modeling approach that allows for rapid,automated construction and calibration of models at a scale appropriate to the problem at hand (https://doi.org/10.3133/sir20215142). Results from the four general models in this archive were compared to results from the edited versions of the four inset models to evaluate the degree to which the general models reproduce behavior simulated by the inset models that use conventional flow modeling techniques. The underlying directories contain all the input and output files for the MODFLOW-NWT simulations and MODPATH particle tracking analysis for the edited versions of four inset models, and the four general models simulating the same four basins as the inset models described in the USGS Scientific Investigations Report (https://doi.org/10.3133sir20215142). The MODFLOW-NWT (v 1.0.9) and MODPATH 6 (version 6.0.1) executables and source codes, various ancillary python scripts written for this project, and model geospatial data are also included in the archive. Descriptions of the data in each subdirectory are provided to facilitate understanding of this this model archive. File descriptions are provided for select input and output files to provide additional information that may be of use for understanding this this model archive.
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MODFLOW-NWT inset models from the regional Lake Michigan Basin Model in support of groundwater age calculations for glacial aquifers
공공데이터포털
Five MODFLOW-NWT inset models were extracted from the Lake Michigan Basin (LMB) regional model (https://pubs.usgs.gov/sir/2010/5109/). These inset models were designed to serve as a training ground for metamodels of groundwater age in glacial wells. The study areas of the inset models correspond to HUC8 basins. Two of the basins are tributary to Lake Michigan from the east, two are tributary to the lake from the west, and one is located outside the western boundary of the Lake Michigan topographic basin. The inset models inherit many of the inputs to the parent LMB model, such as its hydrostratigraphy and layering scheme, the hydraulic conductivity assigned bedrock layers, the recharge distribution, and water use in the form of pumping rates from glacial and bedrock wells. The construction of the inset models entails modifying some inputs, most notably the grid spacing (reduced from cells 5000-ft on a side in the parent model to 500-ft on a side in the inset models). The refined grid spacing allowed more precise location of pumping wells and more detailed simulation of groundwater/surface-water interactions. Also modified are the glacial hydraulic conductivity values, the top bedrock surface elevation, and the surface-water network input to the inset models. The inset models are solved using the MODFLOW-NWT code which allows for more robust handling of conditions in unconfined aquifers than previous versions of MODFLOW. The particle-tracking code MODPATH was used to simulate the distribution of age of groundwater discharging to wells pumping from glacial deposits. This USGS data release contains all of the input and output files for the simulation of the inset models of the Lake Michigan Basins model as described in the associated model documentation report (https://doi.org/10.3133/sir20185038).
MODFLOW-NWT inset models from the regional Lake Michigan Basin Model in support of groundwater age calculations for glacial aquifers
공공데이터포털
Five MODFLOW-NWT inset models were extracted from the Lake Michigan Basin (LMB) regional model (https://pubs.usgs.gov/sir/2010/5109/). These inset models were designed to serve as a training ground for metamodels of groundwater age in glacial wells. The study areas of the inset models correspond to HUC8 basins. Two of the basins are tributary to Lake Michigan from the east, two are tributary to the lake from the west, and one is located outside the western boundary of the Lake Michigan topographic basin. The inset models inherit many of the inputs to the parent LMB model, such as its hydrostratigraphy and layering scheme, the hydraulic conductivity assigned bedrock layers, the recharge distribution, and water use in the form of pumping rates from glacial and bedrock wells. The construction of the inset models entails modifying some inputs, most notably the grid spacing (reduced from cells 5000-ft on a side in the parent model to 500-ft on a side in the inset models). The refined grid spacing allowed more precise location of pumping wells and more detailed simulation of groundwater/surface-water interactions. Also modified are the glacial hydraulic conductivity values, the top bedrock surface elevation, and the surface-water network input to the inset models. The inset models are solved using the MODFLOW-NWT code which allows for more robust handling of conditions in unconfined aquifers than previous versions of MODFLOW. The particle-tracking code MODPATH was used to simulate the distribution of age of groundwater discharging to wells pumping from glacial deposits. This USGS data release contains all of the input and output files for the simulation of the inset models of the Lake Michigan Basins model as described in the associated model documentation report (https://doi.org/10.3133/sir20185038).
MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015
공공데이터포털
A previously developed three-dimensional groundwater flow model (https://doi.org/10.3133/sir20125183) of the three primary aquifers in the region north of Aberdeen, South Dakota, was revised to assist the City of Aberdeen with water-resource planning. The principal aquifers are the Elm, Middle James, and Deep James. The numerical model is intended to be used to (1) simulate hydrologic scenarios of interest to groundwater managers and to advance the understanding of groundwater budgets and components including recharge, discharge, and aquifer storage, (2) compute historical and projected system response to natural and anthropogenic stresses, and (3) evaluate potential withdrawal scenarios to assist with water-management decisions. The three-dimensional groundwater-flow model was developed using the USGS's numerical modeling software, MODFLOW-NWT. The model included both steady-state (mean) and transient (temporally varying) conditions. Steady-state data were from October 1, 1974 to September 30, 2009, and the transient time period included data from October 1, 1974 to September 30, 2015. The model was calibrated by attempting to match simulated and measured or estimated hydraulic heads, differences in hydraulic heads between aquifers, and stream base flow. Water budgets for the model's layers area were produced with ZONEBUDGET. This USGS data release contains all of the input and output files for the model described in the associated model documentation report (http://doi.org/10.3133/sir20185137). The data release also includes (1) MODFLOW-NWT (version 1.1.4) source code, and (2) ZONEBUDGET (3.01) source code.
MODFLOW-NWT model of the glacial aquifer system north of Aberdeen, South Dakota, through water year 2015
공공데이터포털
A previously developed three-dimensional groundwater flow model (https://doi.org/10.3133/sir20125183) of the three primary aquifers in the region north of Aberdeen, South Dakota, was revised to assist the City of Aberdeen with water-resource planning. The principal aquifers are the Elm, Middle James, and Deep James. The numerical model is intended to be used to (1) simulate hydrologic scenarios of interest to groundwater managers and to advance the understanding of groundwater budgets and components including recharge, discharge, and aquifer storage, (2) compute historical and projected system response to natural and anthropogenic stresses, and (3) evaluate potential withdrawal scenarios to assist with water-management decisions. The three-dimensional groundwater-flow model was developed using the USGS's numerical modeling software, MODFLOW-NWT. The model included both steady-state (mean) and transient (temporally varying) conditions. Steady-state data were from October 1, 1974 to September 30, 2009, and the transient time period included data from October 1, 1974 to September 30, 2015. The model was calibrated by attempting to match simulated and measured or estimated hydraulic heads, differences in hydraulic heads between aquifers, and stream base flow. Water budgets for the model's layers area were produced with ZONEBUDGET. This USGS data release contains all of the input and output files for the model described in the associated model documentation report (http://doi.org/10.3133/sir20185137). The data release also includes (1) MODFLOW-NWT (version 1.1.4) source code, and (2) ZONEBUDGET (3.01) source code.
MODFLOW-NWT and MODPATH models, data from aquifer tests and temperature profilers, and groundwater flux estimates used to assess groundwater/surface-water interactions in Haskell Lake, Wisconsin
공공데이터포털
A MODFLOW-NWT model was used to simulate the water budget for Haskell Lake and Tower Creek in WI using the Lake, Streamflow Routing, and Unsaturated Zone Flow packages. Particle tracking was performed with the MODFLOW solution (using MODPATH 6). This USGS data release contains all of the input and output files for the simulations described in the associated model documentation report (https://doi.org/10.3133/sir20205024).
MODFLOW-NWT groundwater-flow models used to delineate areas contributing recharge to selected production wells in unconfined and confined glacial valley-fill aquifers in Chenango River Basin, New York
공공데이터포털
In the Chenango River Basin, New York, glacial valley-fill unconfined and confined aquifers are an important source of drinking-water supplies. The U.S. Geological Survey developed three-dimensional groundwater-flow models (MODFLOW-NWT code) of three study areas in the basin to improve understanding of groundwater flow and delineate areas contributing recharge to 16 production wells as part of an effort to protect the source of water to these wells. The modeled areas were the Cortland study area in Cortland County (CCSA), Greene study area (GSA), and the Cincinnatus study area (CSA). Production wells in CCSA tap unconfined aquifers, whereas the production wells in GSA and CSA are screened in confined aquifers. The CCSA, which has an extensive calibration dataset, was calibrated by nonlinear regression and included a prediction uncertainty analysis. The GSA and CSA were manually calibrated because of the sparse model design and calibration information. The groundwater-flow models along with particle tracking (MODPATH code) were used to simulate water levels, base flows, water budgets, and flow paths. The USGS data release contains all the input and output files and source codes for the simulations described in the associated report: https//doi.org/10.3133/sir20215083.
MODFLOW-2005 and MODPATH6 models used to simulate groundwater flow and transport and base-flow age in two tributaries to the Upper Chester River, Maryland
공공데이터포털
A steady state three-dimensional groundwater flow (MODFLOW-2005) and advective transport (MODPATH6) model was developed to examine subsurface travel times to wells and receiving streams in two subcatchments contributing to the Upper Chester River, Maryland. The model was calibrated to conditions from 1990 to 2005, the period for which groundwater levels, stream discharge measurements, and atmospheric tracer measurements were jointly available. Six calibrated model scenarios were generated and paired with First Order Second Moment (FOSM) linear uncertainty analysis tools to evaluate (i) the uncertainty of base-flow age estimates as well as (ii) the worth of future data collection. The development of the model input and output files included in this data release are documented in the Journal of Hydrology article (https://doi.org/10.1016/j.jhydrol.2018.02.006).
MODFLOW-2005 and MODPATH6 models used to simulate groundwater flow and transport and base-flow age in two tributaries to the Upper Chester River, Maryland
공공데이터포털
A steady state three-dimensional groundwater flow (MODFLOW-2005) and advective transport (MODPATH6) model was developed to examine subsurface travel times to wells and receiving streams in two subcatchments contributing to the Upper Chester River, Maryland. The model was calibrated to conditions from 1990 to 2005, the period for which groundwater levels, stream discharge measurements, and atmospheric tracer measurements were jointly available. Six calibrated model scenarios were generated and paired with First Order Second Moment (FOSM) linear uncertainty analysis tools to evaluate (i) the uncertainty of base-flow age estimates as well as (ii) the worth of future data collection. The development of the model input and output files included in this data release are documented in the Journal of Hydrology article (https://doi.org/10.1016/j.jhydrol.2018.02.006).
MODFLOW-NWT 2016 groundwater flow model for Dane County, Wisconsin
공공데이터포털
A new groundwater flow model was created for Dane County, Wisconsin, to replace an earlier model developed in the 1990s by the Wisconsin Geological and Natural History Survey (WGNHS) and the U.S. Geological Survey (USGS). This modeling study was conducted cooperatively by the WGNHS, the Capital Area Regional Planning Commission, and the USGS. Although the overall conceptual model of the groundwater system remains largely unchanged, the incorporation of newly acquired, high-quality datasets, recent research findings, and improved modeling and calibration techniques have led to the development of a much more detailed and sophisticated model representation of the groundwater system. The new model is three-dimensional and transient, and conceptualizes the county’s hydrogeology as a 12-layer system including all major unlithified and bedrock hydrostratigraphic units and two high-conductivity horizontal fracture zones.
MODFLOW-NWT 2016 groundwater flow model for Dane County, Wisconsin
공공데이터포털
A new groundwater flow model was created for Dane County, Wisconsin, to replace an earlier model developed in the 1990s by the Wisconsin Geological and Natural History Survey (WGNHS) and the U.S. Geological Survey (USGS). This modeling study was conducted cooperatively by the WGNHS, the Capital Area Regional Planning Commission, and the USGS. Although the overall conceptual model of the groundwater system remains largely unchanged, the incorporation of newly acquired, high-quality datasets, recent research findings, and improved modeling and calibration techniques have led to the development of a much more detailed and sophisticated model representation of the groundwater system. The new model is three-dimensional and transient, and conceptualizes the county’s hydrogeology as a 12-layer system including all major unlithified and bedrock hydrostratigraphic units and two high-conductivity horizontal fracture zones.
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