Contribution to ESEAS-RI project 2002-2005 by Hydrographic Institute of the Republic of Croatia

Nenad Domijan (HHI); Nenad Leder (HHI); Hrvoje Mihanović (HHI); Srđan Čupić (HHI); Mladen Srdelić (HHI); Goran Strinić (HHI); Zvonko Gržetić (HHI); Ivica Vilibić;

Godina: 2005


A summary of efforts and activities undertaken by the Hydrographic Institute of the Republic of Croatia (HHI) and directed towards the improvement of the sea-level observing system along the eastern coast of the Adriatic Sea is given in this paper. HHI owns and operates a network of four long-term tide gauge stations (Rovinj, Zadar, Split-harbour, Dubrovnik) working continuously from 1955 until present. Within the ESEAS-RI project, from 2002 to 2005, HHI contributed in WP1 - Quality control of the sea level observations, WP2 - Absolute sea level variations and in WP4 Improving the sea level observing system. The emphasis was placed on T1.4 - Data rescue (scanning old marigrams, development of digitalization package) as HHI had approximately 210 years of analogous marigrams which were not converted into digitalised format. Another important contribution was in the framework of T4.2 Upgrading tide gauge stations. In May 2004, CGPS collocation campaign had been organized at the Split-harbour tide gauge station (T4.3 - Co-location of tide gauge stations with GPS). Finally, a software package has been created for converting collected sea-level data into the ESEAS-RI format defined for ESEAS Tide Gauge Data web site. The problems which were encountered during different stages of HHI involvement in ESEAS-RI are also going to be stressed and presented. One of the most interesting and peculiar examples was the problem with the installation of satellite telephony antenna on the roof of Split tide gauge during International Boat Show in April 2005. Between 2 and 1 1 April CGPS data quality was very poor, since CGPS antenna was almost completely covered by satellite dish fixed on the roof without any notice or approval.