Temporal variability of Submarine Groundwater Discharge: assessments via radon and seep meters, the southern Carmel Coast, Israel

Y. Weinstein, Y. Shalem, W. C. Burnett, P. Swarzenski, B. Herut

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Original languageAmerican English
Title of host publicationA New Focus on Groundwater–Seawater Interactions
EditorsY. Weinstein
PublisherInternational Association of Hydrological Sciences
StatePublished - 2007

Bibliographical note

Seep meter data from Dor Bay, Israel, showed a steady decrease in submarine groundwater discharge (SGD) rates between March and July 2006 (averages of 34, 10.4 and 1.5 cm d-1 in March, May and July, respectively), while estimates based on radon time series showed remarkably uniform averages (8 cm d-1). The May seep meter data show a rough positive correlation
with sea level, unlike the negative correlation shown by the Rn-calculated rates. Smaller-size meters, deployed in July adjacent to the regular-size ones, showed significantly higher rates (10 cm d-1), which negatively correlated with salinity. It is suggested that the decreased rates documented by the seep meters are the result of an increased shallow seawater recharge in the bay (due to
decreasing hydraulic gradients). This is not captured by the radon, since recharging water is radon-poor. The positive correlation of discharge with sea level is due to increased seawater recycling in times of high sea stand.

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