报告摘要：Ice formation can affect many fields of hydraulics, hydrology, civil engineering, ship design and ecology such as for example: ice jamming and flood protection, ice damage on shoreline and onshore facilities, sediment transport problems, design of Icebreakers and arctic ships and habitat improvements projects and river restoration in cold regions. From the abovementioned, the ensuring and improving flood protection is one of the most important factors to determine sustainable and stable social and economic development in regions and countries. Mathematical models can supplement and help to understand the physical processes of river ice, and at the same time, they can also be a tool to support the design of  engineering projects. They have become valuable tools for exploring the research area of river ice, such as understanding the physical processes and simulating river ice phenomena, and even forecasting ice floods. Such a model can be used to provide a continuous description of river ice development based on a limited amount of field data.  A common issue in engineering practice is to estimate the ice congestion and jamming potential of rivers due to planned river engineering works or new run-of-river reservoirs and diversion dams. The task most often comes down to determining to what extent hydrotechnical structures will affect ice transport, and whether or not they will not stop the ice run during freeze-up and during spring or mid-winter breakup. The presentation will first introduce to ice processes in inland waters and later will refer to recent engineering projects conducted in Poland within the farmwork of the European Union Water Directive.