GIS-based optimisation of the hydrometeorological network in Greece

The operation of a network of hydrometeorological stations constitutes basic infrastructure for the management of water resources. Despite the increased need for rational water management in Greece, there is not a single network of hydrometeorological stations. Various State Services have established sectional networks of limited coverage, resulting in many disadvantages. This study aims at the optimisation of the existing network, using GIS methods. An optimum network of hydrometeorological stations is designed, which constitutes the base for the optimisation of the present network. The optimum network consists of 1379 hydrometeorological stations and is based on the guidelines of international organisations. The uniform spatial distribution of the stations and criteria concerning the selection of the appropriate site, such as the low terrain slope, easy accessibility and proximity to special interest points, were of special importance for its development. Eventually, only the 20% of the existing stations remain at their locations and are included in the optimised network. The rest of the stations should be redistributed according to the proposed sites of the optimum network.