Figure 7.

Time required for removal of 70% of the added copper to natural lakes and enclosures, plotted against the ratio of lake depth (H) over the settling flux of suspended particulate matter (S). The dashed line is a theoretical line generated using Equation 4 and average m and K _D values of 10.5 mg/L and 10^4.78 L/kg, respectively. For IME microcosms, the average of 70% removal times for the 6 nominal copper treatments was used. For the Novosibirskoye Reservoir (Novo. Res.), the average of the 4 dissolved copper 70% removal times is used. Calc = calculated; Emp = empirical; IME = Fraunhofer Institute for Molecular Biology and Applied Ecology (Schmallenberg, Germany); MELIMEX = MEtal LIMnological Experiment; UWM = unit world model.