ABSTRACT
In hydrology and hydroclimatology, water science with engineering applications and the interaction of water with different mediums in the Earth-atmospheric system are studied. Water occurs on Earth in all its three states: liquid, solid, and gas, in various degrees of motion. Evaporation of water from water bodies such as oceans and lakes, formation and movement of clouds, rain and snowfall, streamflow and groundwater movement are the main topics studied in hydrology and hydroclimatology, which show the dynamic nature of water. The various aspects of water related to the Earth can be explained in terms of climatic variability in a cycle known as the hydrologic cycle.
