Data acquisition and time series management of hydrological and oceanographic phenomena, join to geographical and hydrographical description of the Italian country, are the main institutional assignments of the Italian National Hydrological and Oceanographic Service (Servizio Idrografico e Mareografico Nazionale - SIMN). This State structure is presently a Service of the Department for National Technical Services (Dipartimento per i Servizi Tecnici Nazionali - DSTN) which is directly under the supervision of the Presidency of the Council of Ministers. The Department itself consists of four Services (Geological, Seismic, Hydrographic and Oceanographic, Dams) and the Unified Information System Office (SIU) (fig. 1); each Service is partitioned in several offices and the Hydrographic and Oceanographic as well as the Dams Services have also local offices.
Going into detail the SIMN is organised in 10 local offices, located in Venice, Parma, Bologna, Pescara, Bari, Catanzaro, Naples, Rome, Pisa, Genua, respectively corresponding to the major Italian watersheds borders, and a central structure; partitioned in 11 offices as showed in fig. 1. The offices belonging to echnological and Computer Sciences area are involved in data base and real time network management.
The Department (DSTN) carries out monitoring activities related to land protection; specifically:
In order to achieve its tasks the EDP Centre of SIMN organised since 1995 in the Technological and Computer Sciences area Office, has planned and developed an own information system organised, on basis of commercial software, under Windows NT, in the following correlated sections:
The hardware support for the aforementioned activities is showed in fig. 4. The Alpha PC supports the real time DBMS, based on a SQL server, whereas on the Digital DEC there is the RDB Oracle Data Base concerning historical hydrometeorological data 1950-1986 for more than 8000 sites, about 4000 of which showing long time series.
As far as networking is concerned, the DSTN has a LAN with about 50 PCs and 4 workstations. The WWW site is installed on a Digital DEC platform. Presently it is based on a UNIX Operating System, TCP/IP protocol, normal HTML pages, NETSCAPE and EXPLORER packages. Migration toward ORACLE WEB Software is expected for the end of the year. For e-mail EXPLORER MAIL is used to connect with external users, while EUDORA is adopted for the LAN.