In Hydrology the constant monitoring and measurement of parameters which are related to water in the environment and its distribution, movement, and properties of water in the Earth’s atmosphere, on land, and underground are measured and monitored very precisely. Measurements such as Water level and Surface water flow/current in different water bodies like rivers, lakes, ponds, reservoirs etc. Study on Water cycle, Ground water monitoring, Hydrological Modelling and finally Water management is done using scientific sensors and its measuring devices. Hydrology is crucial for managing water resources, supporting agriculture, maintaining ecosystems, and planning urban infrastructure.