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ARTICLE
Year : 2010  |  Volume : 33  |  Issue : 3  |  Page : 147-149

Recent sedimentation rate at Trombay Naval Jetty of Mumbai Harbour Bay


Environmental Studies Section, Health Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India

Correspondence Address:
Usha Narayanan
Environmental Studies Section, Health Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai
India
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Source of Support: None, Conflict of Interest: None


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A major tool to study rates of sedimentation is 210 Pb dating of sediment cores. In the present study, two core samples of 36cm long and 4.5 cm diameter were collected from Trombay Naval Jetty which is located at ~3 km away from BARC. 210 Pb was estimated in the core fractions by 210 Po which is in secular equilibrium with 210 Pb. 226 Ra in the core fractions were estimated by High resolution 50% RE HP (Ge) Detector. The unsupported 210 Pb was evaluated by subtracting 226 Ra from total 210 Pb in each fraction. The log of unsupported 210 Pb in each fraction was then plotted against depth and the slope of this line was evaluated. The sedimentation rate was obtained by dividing the 210 Pb decay constant by the slope of the log-linear plot of unsupported 210 Pb versus depth. The mean sedimentation rate thus calculated at Trombay Naval Jetty was 1.32 cmy -1 .


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