Hydroperiod is an important ecological parameter driving the growth and composition of vegetation species and the population and distribution of animals. Satellite data offer the opportunity to derive the extent of inland surface water frequently and with high accuracy; thus, allowing for hydroperiod (the length of time each point remains flooded along an annual cycle) estimation based on time-series of satellite-based inundation maps (water masks). More information on hydroperiod and water masks estimation algorithms can be found here: