The main task of hydrography in Austria is the observation and measurement of hydrological processes, as well as their systematic analysis. Hydrography provides the basis for the management of surface water and groundwater. With the measured data, the quantitative water balance of Austria is also created. Department I / 3 Water Balance (HZB) in the Federal Ministry of Agriculture, Regions and Tourism (BMLRT) coordinates the data acquisition, quality control, evaluation and publication of the hydrographic information. The operational work at the measuring points is carried out by the hydrographic organizational units in the federal states, which also oversee the important work of observation.