Natural water resources are the main source of the water on our planet. As we are facing a water crisis, it is important to utilize the current water resources judiciously and planning for the future as well. Natural water is rapidly depleting, and thus, new concepts and methods are required to compensate for the loss and to conserve the resources like rivers, lakes and swamps. This book will provide significant information on the challenges we face in achieving these goals and also the solutions required for the same. It will also provide interesting topics for research, which readers can take up. In the text, using case studies and examples, constant effort has been made to make the understanding of the difficult concepts of this subject, as easy and informative as possible, for the readers. A number of latest researches have been included to keep the readers up-to-date with the global concepts in this area of study.