Structures and methods of calculating river and intra-system hydraulic structures are considered. Examples of calculations are given. When covering all sections of the course, the current regulatory documents are widely used. The most important achievements in the field of reclamation hydraulic engineering in recent years have been taken into account. For students of higher educational institutions studying in the specialty "Land reclamation and water management." It can be useful for students of secondary specialized educational institutions, as well as specialists involved in the design, construction and operation of hydraulic structures.