The book "Methodical instructions for the construction of a mathematical model of the formation of rain floods and its use for the release of operats" by B. Belchikova is a unique study that combines elements of mathematical modeling, hydrology and practical application of scientific knowledge in the field of water resources management. This publication will be a real find for students, graduate students, researchers and practitioners working in the field of ecology, hydrology and meteorology. In his book, Belchikov invites readers to immerse themselves in the complex but fascinating world of mathematical models that help predict and analyze flood phenomena arising from rainfall. The author not only describes the theoretical aspects, but also shares practical recommendations for building models, which makes the material accessible and understandable to a wide audience. Readers will be able to learn how to correctly interpret rainfall data, as well as how to use the results to prevent the negative effects of floods. The book will be especially interesting for those who already have basic knowledge in mathematics and physics, as well as for those who seek to expand their horizons in applied science. Students and graduate students studying natural sciences, ecosystems and water management will find in this publication valuable ideas and methods that will help them in their studies and scientific activities. Practitioners working in the field of ecology and meteorology will be able to use this knowledge to develop effective strategies for managing water resources and minimizing the risks associated with floods. The topics raised in the book concern not only mathematical modeling, but also broader issues, such as the impact of climate change on hydrological processes, the need to adapt to new conditions and the importance of a scientific approach in the management of natural resources. Belchikov emphasizes that proper understanding and prediction of floods can save lives and reduce economic losses, which makes this book especially relevant in the face of global climate change. The author's style is distinguished by clarity and logical presentation, which allows the reader to easily assimilate even the most complex concepts. Belchikov uses many examples and illustrations, which makes the material more clear and understandable. This edition also includes practical assignments and questions for self-testing, which contributes to a deeper understanding of the topic. If you are interested in such works as "Hydrology: basics and applications" or "Mathematical models in ecology", the book Belchikov will be for you a great addition to the library. It will not only expand your knowledge, but also inspire new research in the field of hydrology and ecology. In conclusion, “Methodological guidelines for the construction of a mathematical model of the formation of rain floods and its use for the release of operata” is not just a textbook, but a real find for everyone who seeks to understand and predict complex natural processes. This is a book that opens the door to the world of science and helps to find solutions to pressing environmental problems. Do not miss the opportunity to touch the knowledge that can change your perception of nature and the scientific approach to its study.