Monitoring Gozna and Secu storage reservoirs in Semenic Mountains [articol]

Abstract

Gozna and Secu storage reservoirs are developed in Semenic Mountains on Bârzava River with the scope to obtain electric energy, ensure industrial and drinking water needs for Resita City consumers. Around these lakes recreational areas were developed. In this paper the sampling and analysis method of water samples as well as monitoring program is presented in order to determine values of water quality parameters of those two lakes. The presented monitoring time is 9 years (2001-2009), water quality indicators in the reservoir have been water transparency, temperature, pH, dissolved oxygen, oxygen saturation, CBO₅, CCOMn/O₂, total nitrogen, total phophorous, phytoplankton density, phytoplankton biomass and clorophyll “a”. In the monitoring period, from a trophic point of view, the two reservoirs fall into mesotrophic category with eutrophication tendency, as a result of human activity in the area.