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Saprobiosis is the scientific name for the process of formation of silt deposits at the bottom of reservoirs. Thus, according to chemical criteria, silts are divided into amorphous and crystalline. The amorphous (or pelitic) fraction of sediment (particle size less than 0.02-0.1 mm) contains a mineral colloid, which, together with the organic (detrital) part of the sediment, is characterized as a detrital-organic or organic silt fraction. And detritus is already considered an indicator of the saprobity of a reservoir. As a result, we can conclude that sedimentary processes play an important role in the ecology of lakes and rivers. The silt layer plays a significant role both in water purification and in regulating acidity, oxygen, as well as the chemical composition of the waters of the river and lake itself. So, for example, when the corpses of river organisms rot, organic matter enters the water, which, under the influence of certain bacteria, decomposes into mineral and organic components (fatty acids, lipids, etc.), which is necessary for the growth of many microorganisms. The deposition of such sediments occurs relatively slowly, which means the water remains clean and transparent for a long time. As organic material accumulates in the sludge, larger organic fragments settle there due to the decomposition of ingested residues. This process is called percolation. With such reverse (infiltration