Seep meter data from Dor Bay, Israel, showed a steady decrease in submarine groundwater discharge (SGD) rates between March and July 2006 (average of 34, 10.4 and 1.5 cm d-1 in March, May and July respectively), while estimates based on randon 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 decrease 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 randon, since recharging water is randon-poor. The positive correlation of discharge with sea level is due to increased seawater recycling in times of high sea stand.
Submarine groundwater discharge, Randon, Seep meter, Seawater recycling, Electrical resistively
