This book provides comprehensive insights about water resources. It attempts to understand the multiple branches that fall under this discipline and how such concepts have uses in our environment. Water resources refer to the naturally occurring water bodies which are useful in industrial, agricultural, household and environmental activities. They are found in fresh and saltwater forms. The aim of this text is to provide the students the basic idea of this field. It is a compilation of chapters that discuss the most vital concepts in the field of water resources and its necessity and management. Coherent flow of topics, student-friendly language and extensive use of examples make this textbook an invaluable source of knowledge.