Typical treatment processes consist of grates, coagulation, flocculation, sedimentation, granular filtration and disinfection. Geological processes include erosion, sedimentation, and volcanic activities such as geysers and earthquakes. This involves a series of processes, including coagulation, flocculation, sedimentation, and filtration. Settling basins are ponds constructed for the purpose of removing entrained solids by sedimentation. There are four types of instability in emulsions&colon; flocculation, creaming/sedimentation, coalescence, and Ostwald ripening. Other sedimentary environments are dominated by normal, ongoing sedimentation. Places where large-scale sedimentation takes place are called sedimentary basins. Subsequent marine transgressions were responsible for secondary sedimentation in the basins. The main environmental problems are subaquatic sedimentation and air and water contamination. Water quality deterioration includes scaling or tuberculation, sedimentation, and biofilm formation. The total soil loss from gully formation and subsequent downstream river sedimentation can be sizeable. Molecular properties can be modeled through sedimentation velocity analysis or sedimentation equilibrium analysis. The sedimentation causes natural dams to slowly accumulate. This is done by using sorption where suspended solids are removed by sedimentation. Primary treatment of sewage is removal of floating and settleable solids through sedimentation.