The present book updates the subject content of water resources of earth ecosystem, water quality monitoring, water resources management, Pollution assessment, Modeling and prediction, Monsoon and rainfall interpretations, glacier behavior, water uses, Supply and demand aquatic flora and fauna, Freshwater ecosystem and Aquatic Science. The book will be helpful for the researchers, academia working in the field of water resources of earth ecosystem, water quality monitoring, water resources management, Pollution assessment, Modeling and prediction, Monsoon and rainfall interpretations, glacier behavior, water uses, aquatic biodiversity, Freshwater ecosystem and Aquatic Science.