The change in hydrochemical composition and forms of migration of elements in the Niva river after the decrease of technogenic load

Generalization of results of monitoring the hydrochemical composition of the Niva River before and after the decrease of technogenic load (1984-1985 and 2007 accordingly) has been carried out. Chemical composition of soil waters after the snowmelt period and modification of hydrochemical composition of the Imandra Lake as possible factors influencing the river drain to the White Sea have been considered. The structure of the dissolved forms of elements in the river water has been determined by the "Selector" computer program.