MODFLOW6 and SNTEMP models were developed to simulate groundwater flows and instream temperatures in Beaver Creek, Alaska from 2019-2023 using python scripts to create a reproducible workflow to process input datasets into model files. This data release contains the scripts used to build the SNTEMP and MODFLOW models, process model output to compare to field observations, and develop and run the PEST++ workflow for history matching. These workflows are described in the readme.md files in this archive and are used to implement the modeling decisions described in the associated report, "Simulating present and future Groundwater/Surface-water interactions and stream temperatures in Beaver Creek, Kenai Peninsula, Alaska".

A historical conditions MODFLOW6 and SNTEMP model was developed to simulate groundwater flows and instream temperatures in Beaver Creek, Alaska during the study period and time just prior to the study. Model parameter estimation was performed via history matching of groundwater levels, instream flows and stream temperatures for 2019–2023. This data release contains a version of the historical model built from the best parameter set generated during the history matching. The history matching and model development workflows are archived in the "Groundwater flow and SNTEMP stream temperature model build and history matching workflows" child item associated with this data release. The version of the model included in this child item is the version that was used to generate the historical model results presented in the associated publication "Simulating present and future Groundwater/Surface-water interactions and stream temperatures in Beaver Creek, Kenai Peninsula, Alaska". This data release includes the model input files, executable files, and output files for that historical model.

A historical conditions MODFLOW6 and SNTEMP model was developed to simulate groundwater flows and instream temperatures in Beaver Creek, Alaska during the study period and time just prior to the study. Model parameter estimation was performed via history matching of groundwater levels, instream flows and stream temperatures for 2019–2023. This data release contains a version of the historical model built from the best parameter set generated during the history matching. The history matching and model development workflows are archived in the "Groundwater flow and SNTEMP stream temperature model build and history matching workflows" child item associated with this data release. The version of the model included in this child item is the version that was used to generate the historical model results presented in the associated publication "Simulating present and future Groundwater/Surface-water interactions and stream temperatures in Beaver Creek, Kenai Peninsula, Alaska". This data release includes the model input files, executable files, and output files for that historical model.

Future conditions model scenarios for MODFLOW6 and SNTEMP models were developed to simulate groundwater flows and instream temperatures in Beaver Creek, Alaska from 2019-2050 using climate data from climate projections. The scenario models used updated climate variables with the best set of model parameters selected for the historical model via history matching of groundwater levels, instream flows and stream temperatures for 2019–2023. This data release contains scripts to build each model scenario and output from running each scenario. The versions of the model scenarios included in this child item are the versions that were used to generate the model scenario results presented in the associated publication "Simulating present and future Groundwater/Surface-water interactions and stream temperatures in Beaver Creek, Kenai Peninsula, Alaska". This data release includes the model input files, executable files, and output files for those model scenarios.

Future conditions model scenarios for MODFLOW6 and SNTEMP models were developed to simulate groundwater flows and instream temperatures in Beaver Creek, Alaska from 2019-2050 using climate data from climate projections. The scenario models used updated climate variables with the best set of model parameters selected for the historical model via history matching of groundwater levels, instream flows and stream temperatures for 2019–2023. This data release contains scripts to build each model scenario and output from running each scenario. The versions of the model scenarios included in this child item are the versions that were used to generate the model scenario results presented in the associated publication "Simulating present and future Groundwater/Surface-water interactions and stream temperatures in Beaver Creek, Kenai Peninsula, Alaska". This data release includes the model input files, executable files, and output files for those model scenarios.

A combined soil water balance, groundwater flow and stream temperature model was developed to simulate stream temperature under historical and future conditions. Soil-Water-Balance code was used to estimate net infiltration past the root zone and surface runoff, which were applied to a transient, three-dimensional MODFLOW 6 model to simulate the water budget for Beaver Creek and the contributing groundwater flow system at a 7-day time resolution. Instream temperatures were simulated using a Stream Network TEMPerature (SNTEMP) model based on the Streamflow Routing (SFR) Package network and simulated groundwater discharge and surface runoff from the MODFLOW model. Model parameter estimation was performed via history matching of groundwater levels, instream flows and stream temperatures for 2019–2023. Future climate scenarios were developed using an initial spin up 2019-2023 period and then downscaled data from the Scenarios Network for Alaska and Arctic Planning (SNAP) for 2023-2050 This data release is split into 6 child items so that a user can choose which portions of the model archive to download to avoid downloading large model files that are unnecessary for a particular use. An overview of the contents of each child item and complete instructions for downloading the model input and output files, running the model, and running the python scripts used to build and update the model are provided in the parent_beaver_creek_readme.md file at the main level of this data release and the readme.md files provided with each data release child item.

A combined soil water balance, groundwater flow and stream temperature model was developed to simulate stream temperature under historical and future conditions. Soil-Water-Balance code was used to estimate net infiltration past the root zone and surface runoff, which were applied to a transient, three-dimensional MODFLOW 6 model to simulate the water budget for Beaver Creek and the contributing groundwater flow system at a 7-day time resolution. Instream temperatures were simulated using a Stream Network TEMPerature (SNTEMP) model based on the Streamflow Routing (SFR) Package network and simulated groundwater discharge and surface runoff from the MODFLOW model. Model parameter estimation was performed via history matching of groundwater levels, instream flows and stream temperatures for 2019–2023. Future climate scenarios were developed using an initial spin up 2019-2023 period and then downscaled data from the Scenarios Network for Alaska and Arctic Planning (SNAP) for 2023-2050 This data release is split into 6 child items so that a user can choose which portions of the model archive to download to avoid downloading large model files that are unnecessary for a particular use. An overview of the contents of each child item and complete instructions for downloading the model input and output files, running the model, and running the python scripts used to build and update the model are provided in the parent_beaver_creek_readme.md file at the main level of this data release and the readme.md files provided with each data release child item.

This item provides the output files from water budget simulations for the Beaver Creek Basin and surrounding areas during the historical period 1944 to 2023 and a future conditions period that starts in 2014 and goes to 2050 and uses climate projection data. The simulations produce gridded daily data estimates of net infiltration (water that might become groundwater recharge), rejected net infiltration, runoff, actual evapotranspiration and gross precipitation. The model output files are in netcdf4 format and all water budget components are in inches. The outputs used in the Beaver Creek groundwater and stream temperature model (net infiltration, rejected net infiltration, and runoff) and included in this child item. The model input files used to generate these outputs are archived in the associated soil was balance model inputs child item in the parent data release that this directory is contained in. These simulations were done with the USGS SWB model (version 2; Westenbroek and others, 2018). Further details about this application of the SWB model can be found in the related primary publication.

This item provides the output files from water budget simulations for the Beaver Creek Basin and surrounding areas during the historical period 1944 to 2023 and a future conditions period that starts in 2014 and goes to 2050 and uses climate projection data. The simulations produce gridded daily data estimates of net infiltration (water that might become groundwater recharge), rejected net infiltration, runoff, actual evapotranspiration and gross precipitation. The model output files are in netcdf4 format and all water budget components are in inches. The outputs used in the Beaver Creek groundwater and stream temperature model (net infiltration, rejected net infiltration, and runoff) and included in this child item. The model input files used to generate these outputs are archived in the associated soil was balance model inputs child item in the parent data release that this directory is contained in. These simulations were done with the USGS SWB model (version 2; Westenbroek and others, 2018). Further details about this application of the SWB model can be found in the related primary publication.

This data release contains measurements from continuous monitors of stream temperature, groundwater temperature, and well water levels, and discrete measurements of discharge and stream shading.