Keywords: satellite images, flux, thermal anomalies, salinity, Western Australia, thermal remote sensing, groundwater discharge, seasonal temperature variation
Application of thermal remote sensing to delineate groundwater discharge zones
The paper explores whether thermal anomalies at the surface identified by remote sensing allow for the delineation of groundwater discharge zones. The methodology is based on the principle that in shallow groundwater systems, upward fluxes of deep groundwater discharge reduces seasonal temperature variation in layers close to and at the surface. Thermal anomalies were identified by Landsat data and compared between two winter images separated by 11 years during which a large drainage scheme was implemented. Though there were a number of limiting factors defined, the approach proved useful for identifying groundwater discharge zones at the study site.