The second edition of "Study and Interpretation of the Chemical Characteristics of Natural Water" by John D. Hem provides a comprehensive review of chemical, geological, and hydrological principles that influence the composition of natural water. It includes methods for studying and interpreting chemical analyses. The book addresses the chemical composition of natural water, its sources, and the factors that influence its characteristics. It discusses the chemical reactions, equilibrium, and processes that shape the composition of water, as well as the environmental and geological factors that affect it. The book also covers the analysis and interpretation of water samples, including the use of various units and methods for expressing water analyses. It includes discussions on the chemical properties of various elements and compounds found in natural water, such as silica, aluminum, iron, manganese, calcium, magnesium, sodium, potassium, and alkalinity. The book also addresses the influence of human activities on water quality and the importance of understanding water chemistry for the management and use of water resources. The book is intended for scientists, engineers, and others interested in the field of natural-water chemistry, with a focus on inorganic geochemistry. It provides a foundation for understanding the chemical characteristics of natural water and their significance in environmental and geological contexts.The second edition of "Study and Interpretation of the Chemical Characteristics of Natural Water" by John D. Hem provides a comprehensive review of chemical, geological, and hydrological principles that influence the composition of natural water. It includes methods for studying and interpreting chemical analyses. The book addresses the chemical composition of natural water, its sources, and the factors that influence its characteristics. It discusses the chemical reactions, equilibrium, and processes that shape the composition of water, as well as the environmental and geological factors that affect it. The book also covers the analysis and interpretation of water samples, including the use of various units and methods for expressing water analyses. It includes discussions on the chemical properties of various elements and compounds found in natural water, such as silica, aluminum, iron, manganese, calcium, magnesium, sodium, potassium, and alkalinity. The book also addresses the influence of human activities on water quality and the importance of understanding water chemistry for the management and use of water resources. The book is intended for scientists, engineers, and others interested in the field of natural-water chemistry, with a focus on inorganic geochemistry. It provides a foundation for understanding the chemical characteristics of natural water and their significance in environmental and geological contexts.