The book "Determination of the influence of the structure of the forest fund on the water content of rivers (on the example of the basins of the lakes Ladoga and Ilmen)" performed by the team of authors is a unique scientific study. which reveals the complex relationships between forest ecosystems and hydrological processes in regions with a rich history and diversity of natural landscapes. This work represents an important contribution to the field of environmental hydrology and forestry, proposing new approaches to the assessment and management of water resources in the face of climate change and human impact. This book will be an indispensable guide for scientists, ecologists, hydrologists, foresters and environmental specialists, as well as for students of specialized universities interested in the conservation of water resources and sustainable development of forest territories. Its content is also interesting for a wide audience, which seeks to understand how the structure of the forest fund - the diversity of species, age groups, density and distribution of forest plantations - affects the level of water content of rivers, especially in such unique basins as Ladoga and Ilmen .. The author’s team analyzes in detail the mechanisms of interaction of forest ecosystems with hydrological processes, demonstrating how changes in forest landscapes can significantly affect the water regime of rivers, their water level and quality. The book "Determination of the influence of the structure of the forest fund on the water content of rivers" is not only a theoretical work, but also a practical guide based on extensive field research and modern modeling techniques. The author’s team uses a variety of data collection methods, including remote sensing, geoinformation systems and hydrological models, to show how specific parameters of forest structure are reflected in the hydrological balance. Particular attention is paid to the analysis of the basins of the lakes Ladoga and Ilmen, which are important water arteries of the region and play a key role in the environmental and economic well-being of the surrounding territories. The topics raised in the book are relevant and of keen interest to those who care about the conservation of natural resources and the sustainable use of forest and aquatic ecosystems. The focus is on the impact of forest plantations on the water regime, the role of forests in regulating runoff, flood prevention and water supply. The authors examine in detail the effects of anthropogenic changes, such as deforestation, forest fires, and urbanization, and their impact on the hydrological balance. Through this, the book becomes a valuable source of information for the development of effective strategies for nature conservation and environmental management. A special advantage of this publication is its scientific style, supported by a rich empirical material and analytical conclusions. The author’s team, consisting of recognized specialists in the field of hydrology, forestry and environmental management, created a work that combines theoretical depth and practical applicability. Their approaches and methods can become the basis for further research and projects on water resources management in the forest regions of Russia and abroad. If you are interested in the conservation of natural resources, environmental challenges of our time or are looking for scientifically based solutions for the sustainable development of forest areas, the book “Identifying the influence of the structure of the forest fund on the water content of rivers” will be a valuable source of knowledge for you. Reading it will open new horizons for understanding environmental dynamics and will help to better understand how forest ecosystems affect water balance and river quality, which is especially important in the face of global climate change. This book is a real guide to the complex and fascinating relationship between nature and man, which will definitely find a response from those who appreciate science and care about the future of our planet.