Hidrološka i meteorološka pitanja

The availability of data is the basis of any kind of analysis, and indeed also in hydrology. Systematic hydrological and meteorological measurements and observations on the Sava River Basin started as early as in the late 19th century. The data were collected and then published by the hydrological services of the Austro-Hungarian Empire. After the First World War, the Kingdom of Yugoslavia published data in yearbooks, and after the Second World War, the federal hydro meteorological service published the data collected by the services of the republics. Data from the end of the 19th century are available, compiled and published in Austrian yearbooks. During military operations in the Sava River Basin, interruptions in the observations were evident on a number of measurement points. Advances in computer technology allowed the data to be collected in computerized form, and today the entire process, from field measurements to computerized data collection, is computer-assisted. Data can be collected with time steps of less than one hour. With the development of modern digital technology, the old data, available only in paper format, can today undergo computer processing. Indeed, digitized data are available only for some stations.

Access to high-quality and up-to-date hydrometric data is the foundation for effective water management in the Sava River Basin. National Meteorological and Hydrological Services (NMHSs), environmental regulators, researchers and the public routinely rely on river discharge, precipitation, lake/reservoir levels and other hydrometric data to underpin their provision of flood warnings, water resource assessments, riverine transport information, management of aquatic ecosystems and much more.

In 2003, NHMSs of the FASRB member countries (Slovenia, Croatia, Bosnia and Herzegovina, Serbia), together with NHMSs from Albania and Montenegro, initiated activities for data exchange and development of flood/drought monitoring and forecasting system in Sava River Basin. Since 2006, the Sava Commission has strongly supported cooperation among countries for improved data exchange and flood forecasting and warning services and started with preparation of the Hydrological Yearbooks for the Sava River Basin. From 2012, the Sava Commission also coordinate conducting of joint hydrometric measurements on bordering sections.

In 2015, the Sava Commission in cooperation with relevant national institutions, has taken forward projects that directly build upon the new data and information exchange policy, a Hydrological Information System (Sava HIS) has been developed.