Abstract
A hydrotechnical structure is a structure with devices and technical installations related to them, used for water management and shaping and using water resources. Special attention should be paid to the properties of the used materials, but also to the impact of water and all accompanying processes. Over the years, geosynthetics are increasingly used as a material in construction, including hydrotechnics. The priority aspect when choosing a geosynthetic material is the approach to fulfilling a specific function, reducing investment costs, ensuring stability and strengthening the structure, as well as ease of installation. Due to their wide range of applications and economic advantages, they have gained the reputation of full-fledged building materials. The article presents the most important possibilities of using synthetic polymers in hydrotechnics. The functions and advantages of individual permeable and impermeable materials were taken into account. Most geosynthetics serve as reinforcement, these are geotextiles, triaxial geogrids, geogrids, geocomposites. These materials are used in strengthening the ground and slopes, separating land, as independent drainage and as protection of drainage systems.