Forecasting concentrations of organic chemicals in the vadose zone caused by spills of hydraulic fracturing wastewater

Abstract

Forecast for the temporary evolutions of concentrations and volumes of the pollutant source • Predictive evolution of VOC concentrations in soil/air/aquifer • Dynamic behaviour associated with scenarios of natural conditions • The model can be a tool to improve the monitoring strategy.

Appraisal of Groundwater Contamination from Surface Spills of Fluids Associated with Hydraulic Fracturing Operations

“…Generally, aquatic diffusion coefficients increase with temperature (Venkatanarayanan et al, 2021). In the case of dry soils, gas diffusion is usually the dominant transport mechanism for volatile organic compounds (VOCs) (Ma et al, 2019).…”

Regional Scale Assessment of Shallow Groundwater Vulnerability to Contamination from Unconventional Hydrocarbon Extraction

“…However, UOG spills may consist of complex chemical mixtures of unknown volume and composition for which data on the sorptive and degradative characteristics of the chemical constituents is sparse. , Moreover, large-scale contaminant transport simulations in complex terrain and involving multiple potential sources typical in UOG-affected landscapes may be computationally intractable . Previous modeling studies have thus been limited to investigating the fate and transport of hypothetical spill scenarios considering individual compounds and idealized transport simulation domains. − Drinking water contamination risks that are distributed nonuniformly over regional scales of UOG fields, where large numbers of water wells exist in proximity to UOG wells, remain underexplored.…”