Water is the driving force of human life as well as for complete ecosystem. It connects us all together; making inscrutable, multifaceted mutuality between society, the economy, and environments. Due to rapid population growth and economic intensification, the competing demand for water resources has been raising. Water insecurity—or the lack of the right quantity (sometimes excess or sometime scanty) and quality of water in a given space and time—poses one of the most significant risks for Bihar. To efficiently manage and minimise impacts from the water insecurity, past data is essential need. The collection of data at spatial (location wise) and temporal (time wise) basis needs huge physical infrastructure as well as their efficient maintenance. In the era of space-based technology, water resources practitioner could be the potential user of satellite derived products.
Water resources management is getting towards higher efficiency using data from in-situ as well remotely sensed data. Sometimes the all data related to hydrological cycles are not available with reasonable accuracy. Remote sensing and GIS are changing the way we achieve water resources management through data and suggests that the coming years will bring both exciting advancements and new challenges for water resources manager. To make up for a shortage of water related data and make it more reliable (a consequence of limited in situ monitoring networks) many scientists is started to rely on remotely sensed data acquired from satellites. Satellite information can now describe almost every facet of the water cycle in near real time, and scientists are putting the data to good use. Remote sensing data already playing a significant role in water resources management across the world but for the Indian conditions especially for Bihar its role could be improved.
