The Central Water Commission (CWC) is the nodal agency for collection, compilation, and dissemination of hydrological data in India.

Rain gauge stations are the primary source of hydrological data in India, providing information on rainfall amounts and distribution.

There are over 40,000 rain gauge stations in India, providing a dense network for rainfall monitoring.

River gauging stations are primarily used to measure river discharge, which is the volume of water flowing through a river at a given time.

There are over 2,000 river gauging stations in India, providing data on river discharge and other hydrological parameters.

Groundwater monitoring wells are the primary source of groundwater data in India, providing information on groundwater levels, quality, and storage.

There are over 30,000 groundwater monitoring wells in India, providing data on groundwater conditions across the country.

Satellite remote sensing is primarily used in hydrology to estimate rainfall, particularly in areas where rain gauge stations are sparse.

INSAT-3D is the primary satellite used for rainfall estimation in India, providing data for weather forecasting and hydrological applications.

Hydrological data and information are primarily used to support water resources planning and management, including water allocation, irrigation, and flood control.

The India Meteorological Department (IMD) is responsible for flood forecasting in India, using hydrological data and weather forecasts to predict flood events.

The India Meteorological Department (IMD) is responsible for drought monitoring in India, using hydrological data and weather forecasts to assess drought conditions.

The Central Pollution Control Board (CPCB) is responsible for water quality monitoring in India, assessing the quality of surface water and groundwater resources.

The Central Ground Water Board (CGWB) is responsible for groundwater management in India, including regulation of groundwater extraction and monitoring of groundwater levels.

The Ministry of Water Resources (MoWR) is responsible for water resources planning and development in India, including the development of national water policies and programs.