Hydrology is the scientific examine of the movement, distribution and control of water in the world and different planets, which includes the water cycle, water resources and environmental watershed sustainability. A practitioner of hydrology is referred to as a hydrologist. Hydrologists are scientists analyzing earth or environmental science, civil or environmental engineering and bodily geography. the use of diverse analytical techniques and medical strategies, they collect and examine records to assist remedy water associated issues consisting of environmental protection, natural disasters, and water control. Hydrology subdivides into floor water hydrology, groundwater hydrology (hydrogeology), and marine hydrology. domains of hydrology encompass hydrometeorology, surface hydrology, hydrogeology, drainage-basin control and water first-rate, where water performs the relevant role.