THE PROTECTION OF WATER QUALITY IN THE GILAU RESERVOIR LAKE

Abstract

This paper represents the synthesis of a complex plan of water control and protection in the Gilau Reservoir Lake. We anticipate that in the medium term this water protection plan for the Gilau Reservoir Lake will be fully incorporated in the much broader plan for the Somes-Tisa Hydrographic Basin, soon to be developed in the process of implementation of the European Framework Directive (the EU Water Framework Directive 2000/60/CE ). To this effect, the water protection plan in the Gilau Reservoir Lake may become an important part of the regional implementation process for the EU Water Framework Directive (EU WFD). The ideas set forth in this plan derive from Romanian legislation, the European Framework Directive and from several conclusions drew in the various national and international meetings concerning the development of this particular field. After analyzing the general situation regarding the quality of water in Somes Basin and in the Gilau storage basin especially we can appreciate that: The pollution of the Somes basin, registered today to an alarming level, is generated mainly by the antropic factor, implied in the economical and technical development of the zone. Human pollution activity has manifested by introducing in the analyzed space of some new elements, resulted from technical development, industry, transportation, the chemification of the agriculture etc. has perturbed the ecological equilibrium of the area. It has been ascertain that there is a continuous tendency of alluviation in the Gilau Lake, with the decrease volume of the lake, mixed with an accentuated eutrofisation, especially during the hot period of the year. During the torrent and inundation periods, the turbidity is much more higher. This is due to the excess alluvion material brought by water flows and lakes, as a result of erosion and different wastes. The most affected lakes are Somesul Cald and Gilau, because of the Agârbiciu affluent, whose turbidity can reach thousands NTU. The protection measures of water quality in Gilau storage basin will be adjusted on the base of the results of a complex program of monitoring.