The researchers used satellite data to study the shape and characteristics of the Ranikhola watershed in Sikkim, India. They found that the watershed has gentle slopes and long flow paths, with a low number of streams. This means that water flows slowly through the area. The watershed also has low elevation differences, which suggests it has good potential for groundwater. This kind of analysis helps us understand how water moves through the land and can be useful for planning how to manage soil and water in the area.