The quality of waters from Jiu river basin as influenced by human activity

Abstract

The paper presents the quality indicators of Jiu River in 2011 and 2012 years as infuenced by human activity, especialy fertilizers and manure aplication in 33 communes within Jiu River basin. The fertilizer quantity applied on a hectare varied between 22.5 and 68.5 kg/ha and the nitrogen quantity from manure ranged between 3 and 20 kg/ha; a certain ammount of these applied fertilizers and manure have been leached into soil profile or have been subject of surface runoof. In 2011 there was analized the water from Jiu River by taking water samples at 6 dates (14.01; 09.03; 03.05; 06.07; 09.09 and 10.10) and there was determined that the NO3, NO2, Nt and Pt contents were over MAC (Maximal Admissible Content) because of industrial spill and urban sewage slurry as well as of chemical fertilizers and manure. At water supplying stations from Jiu River basin all water quality indicators show a very good quality of water. In 2012 year the NO3, NO2, Nt and Pt contents were over MAC and the heavy metals content was under MAC, excepting Cu which overpasses MAC.