The annual organic carbon accumulation in Lake Wohlen ranges between approximately 700
to 2,000 gC m-2yr-1(mean, 1,350 gC m-2yr-1). This indicates an extremely high OC accumulation rate compared to reservoir in Central Europe 465 gC m-2yr-1
(Mulholland and Elwood, 1982) and about 500 gC m-2yr-1 in reservoirs globally (Einsele et al., 2001). Hence, OC accumulation in Lake Wohlen is in the upper range of OC accumulation within central European reservoirs, and also possibly globally.