Early detection of snowmelt through detection of the date of the spring-thaw transition. It thus enables to monitor fresh water stored in snow water. It uses combined active and passive microwave spaceborne observations (backscatter and emissivity measurements). It provides historical analysis and forecast. The test case presented is Eastern Canada. Limitations: a poor spatial resolution entails errors (shifts) on the estimated date of snowmelt.
Typically this application detects water-level changes.

References: “Monitoring Dry, Wet, and No-SnowConditions From microwave Satellite Observations” (Alain Royer, Kalifa Goïta, Jacqueline Kohn, and Danielle De Sève); “Evaluation of TerraSAR-X Observations for Wetland InSAR Application (Sang-Hoon Hong, Member, IEEE, Shimon Wdowinski, and Sang-Wan Kim, Member, IEEE)