The article considers the influence of pontoon settlements on the ecology of reservoirs of Ukraine. The main types of pollution and methods of reservoir cleaning due to the creation of pontoon settlements are outlined.
 There are 1157 reservoirs located within Ukraine. The issue of efficient and rational use of reservoirs in Ukraine is becoming increasingly important. The establishment of settlements on the water could help solve the environmental problems present in reservoirs.
 Reservoir pollution can be divided into chemical, bacterial, thermal and radioactive.
 Chemical pollution is the ingress of various chemicals, waste from various industries into the water: petrochemical, pulp and paper, as well as municipal wastewater, waste from livestock farms. Biological pollution is getting into reservoirs together with sewage of various pathogenic microorganisms, spores of fungi, worms. Thermal pollution occurs due to the discharge of heated water from thermal power plants, nuclear power plants and other energy facilities. Radioactive contamination is associated with an increase in the content of radioactive substances in water.
 When designing pontoon settlements in the water area of reservoirs, it is necessary to provide mechanical cleaning methods. Mechanical cleaning is the cleaning of the bottom of the reservoir from large objects of various origins, as well as the removal of large accumulations of benthic and floating species of aquatic plants. The basis of the biological method of purification is the saturation of the reservoir with microorganisms (bacteria). Another very effective way is to stock the ponds with herbivorous species. Such fish species as silver carp, carp, grass carp, pike, pike perch are biological reclamation of reservoirs. The basis of the chemical method of purification is the addition of special reagents of varying composition to the reservoir. The main way to reduce thermal pollution is the gradual abandonment of fossil fuels and the transition to renewable energy using solar energy sources: light, wind and water resources.
 To ensure all methods of cleaning reservoirs, it is necessary to create specialized floating platforms (pontoons) when designing pontoon settlements. On them it is possible to place bases for service of technical fleet (special equipment), various technological equipment; platforms for placement of chemical reagents; fish farming platforms for biological treatment; sorting, temporary storage and processing of garbage, etc. Platforms must be modular, mobile, easy to transport, have mechanical strength and high load capacity. They can also be stationary and mobile, self-propelled and non-self-propelled depending on the functional load and floor-plate of the pontoon settlement.
 Pontoon settlements that are developed according to all the respective laws, norms and rules can be considered effective means of combating pollution of reservoirs and help restore their environmental resources.
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