Hydrogeodesy (HG)

The HG (Hydrogeodesy) group develops methods for depth scaling or depth extrapolation of near-surface soil moisture observed with Cosmic Ray Neutron Sensing (CRNS). The objectives of HG are:

• Extrapolation of near-surface soil moisture observations by CRNS to the entire root zone
• Setting up monitoring sites with unprecedented collocation of non-invasive soil moisture monitoring techniques at horizontal scales of about 100 m (i.e., GNSS reflectometry, CRNS, terrestrial gravimetry)
• Assessing the strength (or absence) of correlation, time lags and signal damping between observations of different integration depths
• Advancing terrestrial gravimetry and GNSS-R as emerging techniques for soil moisture monitoring
• Contributing to a better understanding of water fluxes between atmosphere, soil and groundwater, and quantifying water balances beyond the point or profile scale, including deeper storage variations