Viewing geochemical data online
Background data was first gathered in order to define the geochemical and hydro-geological makeup as well as to select the most appropriate sites for setting up monitoring stations. Geochemical data were organised in the same GIS database as those used for geo-structural and paleo-seismological data. In order to define shallow aquifer geochemical patterns discharging along the NW-SE belt in the western part of the Gulf of Corinth, a survey was conducted in October 2000. The main goal of the survey was to find any uncommon geochemical characteristics in the circulating groundwater and correlate them with tectonic structures using geochemical techniques tested in other areas. Forty-eight sites were sampled, including 41 wells and 7 springs. Of these only three were selected for dissolved gases analysis. The classification of the groundwater sampled included the following: Ca-HCO3, Ca (Na-Mg)-HCO3 (CI-SO4) and Na-HCO3. These results were then made available on the internet via a GIS database and an html-guided tour, which are enclosed on a CD-ROM. The database was developed on a Mapinfo platform, version 6.5 for PCs. The geographic data were derived from Greek topographical maps and can be viewed by layers and digital elevation models were also included. Furthermore, geologic, geophormic and tectonic data were added to the database and updated regularly as the investigation developed. The way in which the collected data is layered within the database helps provide an understanding of how much data exists as well as how consistent the observations are.
