To develop, manufacture and test hydrological instrument or system to suit local conditions. Provide supporting services in the field of hydrological instrumentation. Use of instruments in major irrigation and drainage schemes. provide regular training on maintenance of hydrological instrument and telemetric equipment.

Coordinate hydrological activities carried out in the states which are responsible for operation and maintenance of stations and field data collection. Collect, process, store and retrieve hydrological data for water resources planning, development and management. Publish hydrological data periodically for users. Participate in regional and global activities of WMO pertaining to operational hydrology.

Collaborate with UNESCO's International Hydrological Programme (IHP) for the advancement of hydrological and water resources research and technology to the benefit of the nation. Conduct hydrological research to understand specific hydrological processes and characteristics. Carry out basic and continuous water resources assessment.

Water resources assessment and drought monitoring. To develop flood forecasting and warning systems for major river basins. Monitor and assess droughts in major river basins. Provide advisory service on hydrological applications. Review, develop, update and disseminate hydrological procedures to end users. Participate in activities pertaining to flood disaster management under the auspices of the United Nations such as ESCAP,WMO,Typhoon Committee and IDNDR.