Radiocarbon in seawater intruding into the Israeli mediterranean coastal aquifer

Y. Yechieli, O. Sivan, B. Lazar, A. Vengosh, D. Ronen, B. Herut

Research output: Contribution to journalArticlepeer-review

Abstract

Saline groundwaters from the Israeli coastal aquifer were analyzed for their radiocarbon and tritium content to assess the rate of seawater penetration. The low 14C values (28-88 pMC versus 100-117 pMC in seawater) imply an apparent non-recent seawater source, or water-rock interactions along the penetration route. The latter process is supported by measurable tritium values at some locations, which imply a relatively rapid rate of seawater intrusion. In other locations, low tritium values (<2 T.U.) indicate that recent seawater (<50 yr) did not penetrate inland. The low δ13C values in saline groundwater (average of -5.3% versus 0% in seawater) indicate that the dissolved carbon pool is comprised of a significant fraction of organic carbon. A linear negative correlation between δ13C and 14C implies that this organic source is old (low 14C values).

Original languageEnglish
Pages (from-to)773-781
Number of pages9
JournalRadiocarbon
Volume43
Issue number2 PART II
DOIs
StatePublished - 2001
Externally publishedYes

ASJC Scopus subject areas

  • Archaeology
  • Earth and Planetary Sciences (all)

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