Hydrogeophysics is a crossdisciplinary field integrating hydrogeology with geophysics for more efficient, cost-effective, and minimally invasive characterization and monitoring. Hydrogeophysics aims to provide basic insight to guide understanding of hydrologic processes and applied insight to support the assessment and (or) management of water resources and ecosystem services across multiple scales, as reviewed by Binley et al. (2015). As in geophysical investigations for mineral and fossil energy resources, geophysical applications to hydrologic problems seek to characterize subsurface structure and (or) monitor time-varying conditions (i.e., saturation or concentration); this information provides constraints or calibration data for both conceptual and simulation models of flow and transport. Recent interests and technological advances have expanded the use of geophysics dramatically in many areas of hydrology, including groundwater remediation monitoring (e.g., Kessouri et al., 2022), groundwater/surface-water exchange (e.g., McLachlan et al., 2017), cold regions hydrology (e.g., Briggs et al., 2017), coastal hydrology (e.g., Goebel et al., 2017), and many others.

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