The ocean never stops moving. When you visit the beach, waves roll in and recede and the tides rise and fall. These are small daily changes that balance out over time.
But over the past century, the average height of the sea has risen more consistently—less than a centimeter every year, but those small additions add up. Today, sea level is 5 to 8 inches (13-20 centimeters) higher on average than it was in 1900. That's a pretty big change: for the previous 2,000 years, sea level hadn't changed much at all. The rate of sea level rise has also increased over time. Between 1900 and 1990 studies show that sea level rose between 1.2 millimetres and 1.7 millimetres per year on average. By 2000, that rate had increased to about 3.2 millimetres per year and the rate in 2016 was estimated at 3.4 millimetres per year. Sea level is expected to rise even more quickly by the end of the century.
This project basically collects the data of water bodies connected to land and compares them, after that using a specific efficient algorithm it compares the data every week and shows in how many days the water will take over a specific area.