The book Hydrometry by Sergey Ilyich Kollupailo is a fascinating and in-depth study that immerses the reader in the world of measurements and analysis of water resources. This work will become an indispensable assistant for students, graduate students and specialists in the field of hydrology, ecology and engineering. In it, the author not only shares his knowledge, but also opens the door to a complex but fascinating world of hydrometry, which covers all aspects of the measurement and assessment of water resources. From the first pages of the book, the reader is faced with the basics of hydrometry, a science that studies methods for measuring the characteristics of water bodies. Kollupailo masterfully explains how to measure correctly, what tools to use, and how to interpret the data received. It emphasizes the importance of accuracy and reliability of measurements, which play a key role in water management and environmental protection. Each chapter is filled with examples from practice, which makes the material accessible and understandable even for those who are just beginning to get acquainted with this topic. The book will be of interest not only to specialists, but also to a wide range of readers interested in ecology, environmental protection and sustainable development. It can attract the attention of students, graduate students and teachers, as well as anyone who wants to understand more deeply how water systems work and what factors affect their condition. For lovers of scientific literature and practical research "Hydrometry" will be a real find, because it contains a lot of relevant data and recommendations. The topics raised in the book cover a wide range of issues, from methods for measuring water level and flow to water quality analysis. Kollupailo focuses on the importance of hydrometry in the context of climate change and humanity's growing water needs. It raises issues of sustainable water management, making the book particularly relevant in the light of contemporary environmental challenges. The reader will be able to see how hydrometry affects decision-making in the areas of water, agriculture, and the environment. The style of Sergei Ilyich Kollupailo is distinguished by clarity and accessibility. It skillfully combines a scientific approach with practical recommendations, which allows the reader not only to assimilate the theoretical foundations, but also to apply them in practice. His previous works were also popular among specialists, and "Hydrometry" is no exception. The author actively shares his experience and knowledge, which makes the book not only a textbook, but also a real guide in the world of hydrology. If you are looking for literature on hydrology, ecology or engineering that will help you better understand the importance of water resources and how to measure them, Kollupailo's Hydrometry will be an excellent choice. This book will not only enrich your knowledge, but also inspire further research and practice in this important field. Do not miss the opportunity to immerse yourself in the fascinating world of hydrometry and discover new horizons in understanding the water resources of our planet.