zone 1: aquifer >10m dik. kans >5 MW >50%

zone 3: aquifer >10m dik. kans >5 MW <30%

zone 5: aquifer <10m dik. kans vermogen onbekend

zone 4: aquifer afwezig of <10 dik. kans >5 MW <30%

zone 2: aquifer >10m dik. kans >5 MW 30-50%