The natural sources of water which can be used for various industrial, agricultural, recreational and household activities are termed as water resources. Surface water, under river flows, ground water and frozen water fall under this category. Water resource management refers to those activities which aim to develop, plan, manage and distribute the water resources in the most efficient manner. Some of the commonly used techniques for reclaiming freshwater are desalination, groundwater recharging and reverse osmosis. The key objective of water resource management is to consider all the demands of water, and allocate it on an equitable basis. The sustainability of current as well as future water resources is one of the biggest challenges of this field. This book is a compilation of chapters that discuss the most vital concepts related to the development and management of water resources. Some of the diverse topics covered herein address the varied branches that fall under this category. This book will provide comprehensive knowledge to the readers.