PODATNOŚĆ WÓD PODZIEMNYCH NA ZANIECZYSZCZENIE W OBSZARZE GÓRNEJ ODRY (JCWPd NR 128) WRAZ Z OCENĄ ZAWARTOŚCI AZOTANÓW W WODACH PIERWSZEGO POZIOMU WODONOŚNEGO

Abstract

THE GROUNDWATER NATURAL VULNERABILITY TO CONTAMINATION IN THE UPPER ODRA REGION (GWB 128) INCLUDING THE EVALUATION OF NITRATE CONTENT IN THE FIRST AQUIFERAbstract. The research area is located in the Upper Odra region, on the border-line of Poland and Czech Republic. The aim of the study was the evaluation of natural groundwater vulnerability to contamination within GWB 128. The study area is 833,39 km2. The evaluation of groundwater contamination vulnerability within the research area was performed with the use of MRT parametric method, based on filtration and infiltration time. On the basis of archival materials and data obtained during sozological and hydrogeological mapping the integrated thematic layers in GIS environment were developed. The compilation of individual parameters allowed the calculation of the total time of field water capacity of soils and vadose zone formations (MRT) for designated areas. On the basis of MRT values the degree of contamination vulnerability of the first aquifer was defined. In the area of research five vulnerability classes were defined, conditioned by travel time of contaminants from the surface to first aquifer. In order to evaluate nitrate contamination of groundwater the field work was performed and water samples were collected for laboratory analyses. The relations between natural vulnerability and nitrate groundwater contamination was presented on the map of nitrate content of the first aquifer.