Water is an essential resource for the sustenance of all life on Earth. Water resource management refers to the planning and management of water resources. It seeks to allocate water in an equitable basis so that it can satisfy the requirements of all people, as well as minimize the impact of water use on the natural environment. To achieve these objectives, solutions are sought in urban decision support system, wastewater treatment, effective irrigation practices, etc. This book is compiled in such a manner, that it will provide in-depth knowledge about the theory and practice of water management. It explores all the important aspects of planning and implementation of water management strategies that are relevant in the present day scenario. For all those who are interested in this field, this book can prove to be an essential guide.