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Title: Reactive transport modeling for supporting climate resilience at groundwater contamination sites

Journal Article · · Hydrology and Earth System Sciences (Online)

Abstract. Climate resilience is an emerging issue at contaminated sites and hazardous waste sites, since projected climate shifts (e.g., increased/decreased precipitation) and extreme events (e.g., flooding, drought) could affect ongoing remediation or closure strategies. In this study, we develop a reactive transport model (Amanzi) for radionuclides (uranium, tritium, and others) and evaluate how different scenarios under climate change will influence the contaminant plume conditions and groundwater well concentrations. We demonstrate our approach using a two-dimensional (2D) reactive transport model for the Savannah River Site F-Area, including mineral reaction and sorption processes. Different recharge scenarios are considered by perturbing the infiltration rate from the base case as well as considering cap-failure and climate projection scenarios. We also evaluate the uranium and nitrate concentration ratios between scenarios and the base case to isolate the sorption effects with changing recharge rates. The modeling results indicate that the competing effects of dilution and remobilization significantly influence pH, thus changing the sorption of uranium. At the maximum concentration on the breakthrough curve, higher aqueous uranium concentration implies that sorption is reduced with lower pH due to remobilization. To better evaluate the climate change impacts in the future, we develop the workflow to include the downscaled CMIP5 (Coupled Model Intercomparison Project) climate projection data in the reactive transport model and evaluate how residual contamination evolves through 2100 under four climate Representative Concentration Pathway (RCP) scenarios. The integration of climate modeling data and hydrogeochemistry models enables us to quantify the climate change impacts, assess which impacts need to be planned for, and therefore assist climate resiliency efforts and help guide site management.

Sponsoring Organization:
USDOE Office of Environmental Management (EM)
OSTI ID:
1845054
Journal Information:
Hydrology and Earth System Sciences (Online), Journal Name: Hydrology and Earth System Sciences (Online) Journal Issue: 3 Vol. 26; ISSN 1607-7938
Publisher:
Copernicus GmbHCopyright Statement
Country of Publication:
Germany
Language:
English

References (42)

Bayesian hierarchical approach and geophysical data sets for estimation of reactive facies over plume scales journal June 2014
Near-Surface Disposal Performance Assessment: Modeling Monthly Precipitation and Temperature in Various Climate Environments: Near-Surface Disposal Performance Assessment: Modeling Monthly Precipitation and Temperature in Various Climate Environments journal September 2013
A Systematic Approach to the Evaluation of RCRA Disposal Facilities Under Future Climate-Induced Events: A Systematic Approach to the Evaluation of RCRA Disposal Facilities Under Future Climate-Induced Events journal March 2015
Resilient remediation: Addressing extreme weather and climate change, creating community value journal December 2018
Climate change, land use change and runoff prediction in the Rhine–Meuse basins journal May 2004
Improving Long-term Monitoring of Contaminated Groundwater at Sites where Attenuation-based Remedies are Deployed journal October 2020
Uncertainties in projected impacts of climate change on European agriculture and terrestrial ecosystems based on scenarios from regional climate models journal March 2007
Streamflow response of Belgian catchments to IPCC climate change scenarios journal September 1998
Approaches to surface complexation modeling of Uranium(VI) adsorption on aquifer sediments journal September 2004
Newly recognized hosts for uranium in the Hanford Site vadose zone journal March 2009
Stochastic simulation of uranium migration at the Hanford 300 Area journal March 2011
Climate change impacts on the leaching of a heavy metal contamination in a small lowland catchment journal January 2012
Identifying key controls on the behavior of an acidic-U(VI) plume in the Savannah River Site using reactive transport modeling journal August 2013
Climate change impact on residual contaminants under sustainable remediation journal October 2019
Retention and chemical speciation of uranium in an oxidized wetland sediment from the Savannah River Site journal May 2014
Integrated modelling of climate change impacts on water resources and quality in a lowland catchment: River Kennet, UK journal October 2006
Impact of summer droughts on the water quality of the Meuse river journal May 2008
Beneath the surface of global change: Impacts of climate change on groundwater journal August 2011
Interactions between climate change and contaminants journal December 2007
Impacts of climate change on the fate and behaviour of pesticides in surface and groundwater—a UK perspective journal October 2006
Modeling vulnerability of groundwater to pollution under future scenarios of climate change and biofuels-related land use change: A case study in North Dakota, USA journal March 2013
In Situ Monitoring of Groundwater Contamination Using the Kalman Filter journal June 2018
Uranium(VI) Adsorption and Surface Complexation Modeling onto Background Sediments from the F-Area Savannah River Site journal January 2012
Uranium Immobilization in an Iron-Rich Rhizosphere of a Native Wetland Plant from the Savannah River Site under Reducing Conditions journal July 2014
Impact of Climate Change on Hydrological Regimes and Water Resources Management in the Rhine Basin journal April 2001
Simulation of reactive transport of uranium(VI) in groundwater with variable chemical conditions: SIMULATION OF REACTIVE TRANSPORT OF URANIUM(VI) journal April 2006
How Much Will Precipitation Increase With Global Warming? journal May 2008
Reactive facies: An approach for parameterizing field-scale reactive transport models using geophysical methods: GEOPHYSICS FOR DISTRIBUTING REACTIVE FACIES journal October 2012
Potential evapotranspiration and continental drying journal June 2016
Increase of extreme events in a warming world journal October 2011
Nutrient cycling and N 2 O emissions in a changing climate: the subsurface water system role journal July 2009
Advection, Dispersion, and Confusion journal March 2015
Comparison of Electrostatic and Non-Electrostatic Models for U(VI) Sorption on Aquifer Sediments: B. Arora et al. Groundwater XX, no. X: XX-XX journal July 2017
An Overview of CMIP5 and the Experiment Design journal April 2012
High-resolution geophysical characterization of shallow-water wetlands journal July 2006
A review of the potential impacts of climate change on surface water quality journal February 2009
Modelling future NO3 leaching from an upland headwater catchment in SW Norway using the MAGIC model: II. Simulation of future nitrate leaching given scenarios of climate change and nitrogen deposition journal April 2009
Modelling the effects of changing climate and nitrogen deposition on nitrate dynamics in a Scottish mountain catchment journal April 2009
Nutrient transport scenarios in a changing Stockholm and Mälaren valley region, Sweden journal February 2005
Projection of future climate change impacts on nonpoint source pollution loads for a forest dominant dam watershed by reflecting future vegetation canopy in a Soil and Water Assessment Tool model journal April 2010
PFLOTRAN User Manual: A Massively Parallel Reactive Flow and Transport Model for Describing Surface and Subsurface Processes report January 2015
Climate Science Special Report: Fourth National Climate Assessment, Volume I report January 2017