Hydrology is mentioned as the scientific study of the movement, distribution and management of water on Earth and different planets, together with the water cycle, water resources and environmental watershed property. A practitioner of geophysical science is termed a hydrologist. Hydrologists square measure scientists learning earth or biology, civil or environmental engineering and physiography.Using varied analytical ways and scientific techniques, they collect and analyze information to assist solve water connected issues like environmental preservation, natural disasters, and water management.Hydrology subdivides into surface water geophysical science, groundwater geophysical science (hydrogeology), and marine geophysical science. Domains of geophysical science embrace hydrometeorology, surface geophysical science, hydrogeology, drainage-basin management and water quality, wherever water plays the central role.Oceanography and meteorology don't seem to be enclosed as a result of water is barely one in all several necessary aspects inside those fields.Hydrological analysis will inform environmental engineering, policy and coming up with.The central theme of geophysical science is that water circulates throughout the world through totally {different|completely different} pathways and at different rates. The foremost vivid image of this can be within the evaporation of water from the ocean, that forms clouds. These clouds drift over the land and manufacture rain. The rain flows into lakes, rivers, or aquifers. The water in lakes, rivers, and aquifers then either evaporates back to the atmosphere or eventually flows back to the ocean, finishing a cycle. Water changes its state of being many times throughout this cycle.