C. -P. Hydrometeoizdat, 1992. — 208s. The monograph presents stochastic approaches to the main problems of river hydraulics and hydrometry. The dependences for the characteristics of the unidentified flow and hydraulic resistances of open channels in stochastic form are given. The principles of rational organization of observations on rivers, methods of interpolation and extrapolation of measured water consumption in the calculation of river runoff, an attempt to obtain probabilistic-hydraulic criteria for some types of channel processes. Methods of probabilistic assessment of reliability of hydraulic structures are proposed, taking into account the stochastic nature of hydrological processes and characteristics of the hydraulic regime of rivers. The book is intended for hydrologists and hydrotechnicians, as well as graduate students and students of relevant specialties.