Skip to main content
U.S. flag

An official website of the United States government

The geochemistry of groundwater resources in the Jordan Valley: The impact of the Rift Valley brines

January 1, 2007

The chemical composition of groundwater in the Jordan Valley, along the section between the Sea of Galilee and the Dead Sea, is investigated in order to evaluate the origin of the groundwater resources and, in particular, to elucidate the role of deep brines on the chemical composition of the regional groundwater resources in the Jordan Valley. Samples were collected from shallow groundwater in research boreholes on two sites in the northern and southern parts of the Jordan Valley, adjacent to the Jordan River. Data is also compiled from previous published studies. Geochemical data (e.g., Br/Cl, Na/Cl and SO4/Cl ratios) and B, O, Sr and S isotopic compositions are used to define groundwater groups, to map their distribution in the Jordan valley, and to evaluate their origin. The combined geochemical tools enabled the delineation of three major sources of solutes that differentially affect the quality of groundwater in the Jordan Valley: (1) flow and mixing with hypersaline brines with high Br/Cl (>2 × 10−3) and low Na/Cl (<0.8) ratios; (2) dissolution of highly soluble salts (e.g., halite, gypsum) in the host sediments resulting in typically lower Br/Cl signal (<2 × 10−3); and (3) recharge of anthropogenic effluents, primarily derived from evaporated agricultural return flow that has interacted (e.g., base-exchange reactions) with the overlying soil. It is shown that shallow saline groundwaters influenced by brine mixing exhibit a north–south variation in their Br/Cl and Na/Cl ratios. This chemical trend was observed also in hypersaline brines in the Jordan valley, which suggests a local mixing process between the water bodies.

Publication Year 2007
Title The geochemistry of groundwater resources in the Jordan Valley: The impact of the Rift Valley brines
DOI 10.1016/j.apgeochem.2006.12.002
Authors E. Farber, A. Vengosh, I. Gavrieli, Amarisa Marie, T.D. Bullen, B. Mayer, A. Polak, U. Shavit
Publication Type Article
Publication Subtype Journal Article
Series Title Applied Geochemistry
Index ID 70033024
Record Source USGS Publications Warehouse