Water Systems and Water Management . Methods for assessing water quality and the ecological state of water bodies” is an important work that gathered under one cover the knowledge and experience of many specialists in the field of water resources. The team of authors, consisting of experts, researchers and practitioners, shares their experiences and techniques that will help not only in scientific activities, but also in practical application to ensure sustainable water use. This book examines key aspects of water systems, including their structure, functioning and environmental impact. The authors raise topical issues related to water quality and the ecological state of water bodies, which makes this work an indispensable resource for students, graduate students, researchers, as well as for specialists working in the field of ecology, hydrology and water management. The book will be of interest to a wide range of readers: from students and teachers of universities to practicing environmentalists and engineers. If you are passionate about environmental protection, sustainable development and resource conservation, this publication will be a real discovery for you. It will not only deepen your knowledge of water resources, but also provide an opportunity to get acquainted with modern methods of assessing and monitoring water quality, which is especially relevant in the context of global climate change and growing anthropogenic pressure on natural ecosystems. The topics raised in the book cover a wide range of issues, from the theoretical foundations of water systems to practical recommendations for water quality assessment. The authors emphasize the importance of an integrated approach to water resources management, which includes both scientific research and practical application of the obtained data. The book also addresses the issues of legislative regulation in the field of water use, which makes it especially relevant for professionals involved in the development and implementation of environmental norms and standards. The style of the authors is characterized by accessibility and clarity of presentation, which allows the reader to easily assimilate even the most complex concepts. There are many illustrations, graphs and tables in the book, which makes the material clear and understandable. This is especially important for those who are just beginning their journey in the study of water resources and ecology. The book “Water Systems and Water Management” can become the basis for further research and development in the field of water resources protection . It not only informs, but also inspires action, encouraging the reader to reflect on their contribution to the conservation of aquatic ecosystems. If you are looking for literature on ecology, sustainable development or water resources, this publication will be your reliable assistant. Do not miss the opportunity to immerse yourself in the world of water systems and learn how to maintain the purity and availability of water for future generations. This book is not just a collection of knowledge, it is a call to action that can change your perception of water resources and their meaning in our lives.