Flocculation is the process by which fine particles in suspension aggregate to form larger particles or flocs, typically due to the action of chemical agents or changes in water chemistry. This process is important in sedimentation, water treatment, and the study of fine-grained sediment transport in rivers, lakes, and oceans.
Source Van Olphen, H. (1977). An Introduction to Clay Colloid Chemistry. Wiley-Interscience.