Assessing Changes in Terrestrial Water Storage Components over the Great Artesian Basin Using Satellite Observations

The influence of climate change and anthropogenic activities (e.g., water withdrawals) on groundwater basins has gained attention recently across the globe. However, understanding hydrological stores storage) in one largest deepest artesian basins, Great Artesian Basin (GAB) is limited due to poor distribution monitoring bores. In this study, Gravity Recovery Climate Experiment (GRACE) satellite ancillary data from observations models (soil moisture, rainfall, evapotranspiration (ET)) were used assess changes terrestrial storage (GWS) variations GAB its sub-basins (Carpentaria, Surat, Western Eromanga, Central Eromanga). Results show that there strong relationship GWS variation with rainfall (r = 0.9) ET 0.9 1) Surat some parts Carpentaria sub-basin (2002–2017). Using multi-variate methods, we found primarily driven by sub-basin. While account for much observed spatio-temporal 0.90 at 0–2 months lag), Eromanga 0.10–0.30 more than 12 lag) suggest effects human extraction GAB.