The conjoined application of major and trace elements and isotopic methods yield a deep insight into the development and flow paths of groundwater in the Golan Heights and Ajoun within the border triangle of Israel, Jordan and Syria. Despite location, salinity or temperature of spring or well waters, stable isotopes showed, that the main areas of recharge are the elevated Hermon-Massif and the plain area of southwestern Syria and northern Jordan, with high to medium annually precipitation amounts. Although not connected to the Golan Heights, Jordan may be involved in a comon system as the same Cretaceous aquifer is exploited. Derived flow paths of infiltrated groundwaters strongly indicates partial occurring lateral flow across boundaries from Syria to Jordan and Israel.

By means of the investigated groundwaters we could show, that the combined hydrochemical and isotopic approaches reveal complex and large-scale groundwater infiltration- and flow-systems much better than a focused view on a specific band of elements and changes somehow coomon knowledge on the observed resources. That may have implications on further use.