Abstract:
The article assesses the impact of land use on the change of the water quality in the Osam river basin. At four monitoring points the values of ten indicators are analyzed: dissolved oxygen, hydrogen (pH), electrical conductivity, ammonium nitrate (N-NH4 ), nitrate nitrogen (N-NO3 ), nitrite nitrogen (P-ortho-PO4 ), total phosphorus, biochemical oxygen demand (BOD5 ), which are compared with their reference values, regulated in Ordinance № H-4/2012 for characterization of surface water. A statistical analysis of data from land surveying for land cover and land use in 1990, 2006 and 2012 was made. Geographical information systems (GIS) analyzed the spatial distribution and the quantitative characteristics of the land use in the catchment area of Osam river.