| Autor: |
David Rassam, J. Sreekanth, Dirk Mallants, Dennis Gonzalez, Rebecca Doble, Trevor Pickett |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Frontiers in Water, Vol 3 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2624-9375 |
| DOI: |
10.3389/frwa.2021.799738 |
| Popis: |
Regulators require the gas industry to assess the risks of unintentional release of chemicals to the environment and implement measures to mitigate it. Industry standard models for contaminant transport in aquifers do not explicitly model processes in the unsaturated zone and groundwater models often require long run times to complete simulation of complex processes. We propose a stochastic numerical-analytical hybrid model to overcome these two shortcomings and demonstrate its application to assess the risks associated with onshore gas drilling in the Otway Basin, South Australia. The novel approach couples HYDRUS-1D to an analytical solution to model contaminant transport in the aquifer. Groundwater velocities and chemical trajectories were derived from a particle tracking analysis. The most influential parameters controlling solute delivery to the aquifer were the soil chemical degradation constant and the hydraulic conductivity of a throttle soil horizon. Only 18% of the flow paths intercepted environmental receptors within a 1-km radius from the source, 87% of which had concentrations of |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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