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--- | ||
templateKey: model | ||
slug: mather-2022-groundwater | ||
title: Constraining the response of continental-scale groundwater flow to climate | ||
change | ||
date: '2024-05-20T02:00:54.000Z' | ||
featuredpost: | ||
for_codes: | ||
- 370401 | ||
status: | ||
doi: '' | ||
url: '' | ||
creditText: '' | ||
software: | ||
- name: 'Underworld2: Python Geodynamics Modelling for Desktop, HPC and Cloud' | ||
doi: https://doi.org/10.5281/zenodo.7455999 | ||
url_source: https://github.com/underworldcode/underworld2 | ||
licence: | ||
licence_url: https://creativecommons.org/licenses/by/4.0/legalcode | ||
licence_image: ../../../img/licence/by.png | ||
description: Creative Commons Attribution 4.0 International | ||
licence_file: license.txt | ||
submitter: | ||
name: Dan | ||
family_name: Sandiford | ||
ORCID: https://orcid.org/0000-0002-2207-6837 | ||
creators: | ||
- name: Ben | ||
family_name: Mather | ||
ORCID: 0000-0003-3566-1557 | ||
- name: Dietmar | ||
family_name: Müller | ||
ORCID: 0000-0002-3334-5764 | ||
- name: Craig | ||
family_name: O'Neill | ||
ORCID: 0000-0002-6034-1881 | ||
- name: Adam | ||
family_name: Beall | ||
ORCID: 0000-0002-7182-1864 | ||
- name: R.Willem | ||
family_name: Vervoort | ||
ORCID: 0000-0002-6557-0237 | ||
- name: Louis-Noel | ||
family_name: Moresi | ||
ORCID: 0000-0003-3685-174X | ||
associated_publication: | ||
authors: | ||
- '@type': Person | ||
givenName: Ben | ||
familyName: Mather | ||
- '@type': Person | ||
givenName: R. Dietmar | ||
familyName: Müller | ||
- '@type': Person | ||
givenName: Craig | ||
familyName: O’Neill | ||
- '@type': Person | ||
givenName: Adam | ||
familyName: Beall | ||
- '@type': Person | ||
givenName: R. Willem | ||
familyName: Vervoort | ||
- '@type': Person | ||
givenName: Louis | ||
familyName: Moresi | ||
title: Constraining the response of continental-scale groundwater flow to climate | ||
change | ||
doi: http://dx.doi.org/10.1038/s41598-022-08384-w | ||
url: '' | ||
journal: Scientific Reports | ||
publisher: Springer Science and Business Media LLC | ||
date: 2022-3-16 | ||
compute_info: | ||
name: National Computational Infrastructure | ||
organisation: '' | ||
url: https://ror.org/04yx6dh41 | ||
doi: https://ror.org/04yx6dh41 | ||
research_tags: | ||
- groundwater | ||
- thermal-hydraulic | ||
- Bayesian | ||
- water-management | ||
- Python | ||
- C | ||
- finite element | ||
- heat equation | ||
- advection-diffusion | ||
compute_tags: | ||
- Python | ||
- C | ||
- finite element | ||
- heat equation | ||
- advection-diffusion | ||
funder: | ||
- name: NSW Department of Industry | ||
doi: '' | ||
- name: AuScope | ||
doi: https://ror.org/04s1m4564 | ||
abstract: Numerical models of groundwater flow play a critical role for water management | ||
scenarios under climate extremes. Large-scale models play a key role in determining | ||
long range flow pathways from continental interiors to the oceans, yet struggle | ||
to simulate the local flow patterns offered by small-scale models. We have developed | ||
a highly scalable numerical framework to model continental groundwater flow which | ||
capture the intricate flow pathways between deep aquifers and the near-surface. | ||
The coupled thermal-hydraulic basin structure is inferred from hydraulic head measurements, | ||
recharge estimates from geochemical proxies, and borehole temperature data using | ||
a Bayesian framework. We use it to model the deep groundwater flow beneath the Sydney–Gunnedah–Bowen | ||
Basin, part of Australia’s largest aquifer system. Coastal aquifers have flow rates | ||
of up to 0.3 m/day, and a corresponding groundwater residence time of just 2,000 | ||
years. In contrast, our model predicts slow flow rates of 0.005 m/day for inland | ||
aquifers, resulting in a groundwater residence time of 400,000 years. Perturbing | ||
the model to account for a drop in borehole water levels since 2000, we find that | ||
lengthened inland flow pathways depart significantly from pre-2000 streamlines as | ||
groundwater is drawn further from recharge zones in a drying climate. Our results | ||
illustrate that progressively increasing water extraction from inland aquifers may | ||
permanently alter long-range flow pathways. Our open-source modelling approach can | ||
be extended to any basin and may help inform policies on the sustainable management | ||
of groundwater. | ||
description: This model was developed in order to study groundwater flow on a continental | ||
scale, focusing on the Sydney–Gunnedah–Bowen Basin in Australia. Using data such | ||
as hydraulic head measurements and borehole temperatures, it predicts how water | ||
moves through deep aquifers to the surface. Coastal aquifers show fast water flow, | ||
while inland aquifers have much slower flow. The study shows that increased water | ||
extraction from inland areas could permanently change water flow patterns. This | ||
open-source model can be used for other regions and aims to support sustainable | ||
groundwater management policies | ||
images: | ||
landing_image: | ||
src: '' | ||
caption: '' | ||
graphic_abstract: | ||
src: ./graphics/fig1.png | ||
caption: "Coupled heat-groundwater flow model of the Sydney–Gunnedah–Bowen Basin | ||
based on the MAP estimate of material properties and boundary conditions. (A) | ||
Groundwater velocity field with coal seams outlined in grey overlain with temperature | ||
gradients measured in boreholes. This visualisation of the velocity field obtained | ||
from our model was rendered in 3D using Paraview 5.9 (https://www.paraview.org/). | ||
(B) temperature field overlain with heat flux vectors. The 2D slice was generated | ||
from our models using Matplotlib 3.4 (https://matplotlib.org/).\n" | ||
model_setup: | ||
src: ./graphics/figure_2.png | ||
caption: 3D stratigraphy of the Sydney–Gunnedah–Bowen Basin. The vertical spacing | ||
of layers has been exaggerated for visual clarity. The model of the basin was | ||
rendered in 3D using Underworld. | ||
animation: | ||
src: ./graphics/ | ||
caption: '' | ||
model_setup_info: | ||
url: '' | ||
summary: In this paper, we apply our numerical framework to the Sydney–Gunnedah–Bowen | ||
(SGB) Basin in eastern Australia. The SGB Basin covers about 1.5 million square | ||
kilometers, and we model it in high-resolution 3D, using over 10 million cells | ||
(or 6 x 6 x 0.6 km, in the x, y, z directions, respectively) to detail flow patterns | ||
down to 12 km beneath the crust. By adjusting the model to match real-world data, | ||
it provides accurate insights into water and heat movement through deep aquifers | ||
in large areas. Temperature advection due to groundwater flow is described by | ||
the advection-diffusion equation. Darcy flux is calculated from the groundwater | ||
flow equation. Groundwater recharge and discharge are driven by changes in hydraulic | ||
head, which is set to the height of the water table at the top boundary surface. | ||
The thermal boundary conditions include a constant temperature set to the top | ||
boundary, which corresponds to the annual mean surface temperature. The side | ||
walls are assigned zero flux, and the bottom temperature boundary is an unknown | ||
variable that we invert from borehole temperature data within our Bayesian optimization | ||
scheme. | ||
model_files: | ||
url: '' | ||
notes: In the Scripts folder, HL05 was used to run the optimisation problem and | ||
HL06 was used to take the maximum a posteriori model and run it at high resolution. | ||
file_tree: '' | ||
existing_identifier: https://github.com/brmather/Sydney_Basin/tree/master | ||
nci_file_path: | ||
https://dapds00.nci.org.au/thredds/catalog/nm08/MATE/mather-2022-groundwater/catalog.html | ||
include: true | ||
dataset: | ||
url: '' | ||
notes: "model_output_data contains the following file types:\r\n\r\n.h5 - Underworld2 | ||
data files\r\n.xdmf- Underworld2 xdmf header files\r\n.csv - Various data in csv | ||
format\r\n.npz - data on numpy binary format\r\n.png - image files\r\n.pvsm - | ||
Paraview state files\r\n.txt - data in .txt format" | ||
existing_identifier: '' | ||
nci_file_path: | ||
https://dapds00.nci.org.au/thredds/catalog/nm08/MATE/mather-2022-groundwater/catalog.html | ||
include: true | ||
metadataFile: ro-crate-metadata.json | ||
--- |