Monitoring of Grasslands Management Practices Using Interferometric Products Sentinel-1

Grasslands are globally important for their economic and environmental services, for these reasons their conservation and their mode of exploitation must be monitored. In this work we wanted to study the relationship between temporal interferometric coherence, radar backscattered coefficient and types of agricultural practices associated with grasslands such as grazing, mowing, and the mixed exploitation of these two practices. High coherence values due to backscattering from the ground were linked to ploughed bare fields and low vegetation height and the backscattering coefficient σo increases with the biomass up to a saturation level. Results revealed that grazing actions are easily detectable especially with the coherence values while mowing date cannot be clearly detected whether by coherence or by backscattered coefficient.