Monitoring of Water Salinity of the Lower River Neretva (B&H)

Water regime in the lower course of the Neretva River (Bosnia and Herzegovina) is very complex because of the downstream side impact and built hydropower system with the upstream side. Sea inflow into the aquifer and the surface flows of the valley depends on the amount of flow of fresh water from the basin. In the dry season, when inflows from the catchment reduced and longer duration, can not be drawn into the bed of the river in the form of salt 'wedge', and in the aquifer rises from deeper layers to the surface. This phenomenon extends deep upstream in the river valley. By measuring the physical (salinity, temperature, electrical conductivity) and chemical (amount of dissolved oxygen in water and pH) parameters at lower flow of the river Neretva (delta) water quality was determined with special attention to the occurrence of salinity. During the one-year monitoring were conducted field tests of physical-chemical parameters of the lower course of the Neretva river at 20 locations of significant testing maritime impacts on water quality. The physical parameters were measured temperature, conductivity and salinity, and the chemical quantity of dissolved oxygen, expressed as a percentage and mg L -1 in water and the pH value. The values of the above parameters were measured on the fild with combined meter WTW Multi-Parameter Instruments.