Tide gauge network of the Hydrographic Institute of the Republic of Croatia

Sea level measurements at the tide gauge stations on the eastern Adriatic coast have been conducted for many years. Hydrographic Institute of the Republic of Croatia (HHI) has modernized its tide gauge network by installing Thalimedes digital instrument. Communication with tide gauge stations is performed through GSM network. Data are collected automatically on a daily basis, but there is a possibility of more frequent data collecting in special situations, such as possible flooding of the coastal area, emergency meteorological situations, assessment of risk to people and their property, as well as scientific and technical investigations. First check of the data integrity (communication availability of tide gauge stations, time gaps sequences...) is automatically performed. If a problem occurs, the system warns administrators about possible errors. The analysed data are prepared to be displayed on the HHI website. The website is currently being designed and developed for the display of predicted and measured sea level heights on the eastern Adriatic coast, and the first results are presented in this paper. Tide gauge measurements and the data obtained from such measurements are important for the safety of navigation, marine construction works, the development of oceanographic models, and for the international data exchange.