Abstract
Abstract: Nonlinear parameter estimation techniques were applied to obtain optimum values and confidence intervals for 210 137 mass sedimentation rates in Chesapeake Bay from Pb, Cs and 239,240Pu geochemical tracer profiles. The results show high sedimentation rates of around 0,3-1.2 gm cm-2 yr-1 for the upper bay, modest sedimentation rates of 0.1-0.3 gm cm-2 yr-1 for the middle bay, and modest to high sedimentation rates of 0.1-0.8 gm cm-2 yr-1 for the lower bay. The principal source for the upper bay is the Susquehanna River discharge and that for the lower bay is the ocean and lower bay environment. In terms of total sediment budget the results are in agreement with published evidence that episodic sedimentation events are an important feature of the bay system.
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