SPb. : RGSMU, 2010. — 96 s. — ISBN 978-5-86813-265-0 . The book develops an approach to the study of hydrological objects, excluding their self-sufficiency in terms of mathematical modeling. They are “controlled by others”, their internal activity is usually illusory, the situation is actually controlled by infinite reality. Despite the obvious methodological orientation of the monograph, it contains very specific examples of modeling and forecasting related to river hydraulics, short-term forecasts and estimates of long-term changes in the characteristics of long-term river runoff. It is intended for specialists-hydrologists, students, graduate students and persons interested in the methodology of science .