The book deals with detailed concepts of Environmental Management of Fresh Water Ecology. In order to make these concepts as clear as possible every effort has been made to present the subject matter in a systematic manner and a lucid style using simple and clear language. The editors believe that the influence of this remarkably clear exposition will be noticeable throughout the book and that the entire subject-matter will be readily understood by every student. The editing of this book is an effort to keep pace with continuing rapid developments in this field. This book has been edited to meet the requirements of a wide range of readers including ecology, biological and environments students and engineers, research workers, marine engineers, water engineers, municipal engineers, health engineers, medical students and technicians. This reference book is essentially for those who are developing concern and becoming actively involved in environmental matters.