I layer is calculated by direct assignment of vadose zone material to I index values according to DRASTIC methodology, raning from 1 to 10. In areas covered by subsoil deposits, the vadose zone media classification (the āIā-rating) was based on soil and subsoil type. In areas of exposed bedrock and subcrop or areas with < 3 m of subsoil coverage, the characteristics of the vadose zone was taken from the aquifer characteristics.
In areas covered by subsoil deposits, the vadose zone media was reclassified from theTeagasc subsoils information . In areas with < 3 m of subsoil coverage, the characteristics of the vadose zone was taken from the aquifer characteristics. It was created using ERSI ArcMap 10.5 and QGIS as a shapefile and converted into .tiff format