Limnology is the study of inland waters - lakes, reservoirs, rivers, streams, wetlands and groundwater. Limnological studies have great significance today. These studies provide us a path to explore freshwater bodies in various aspects. It is the study of the structural and functional interrelationships of organisms of inland waters as their dynamic physical, chemical, and biotic environments affect them. Until and unless we have a proper understanding of a water body, it is impossible to exploit it in an appropriate way. A limnological study of Tighra Reservoir, Gwalior, Madhya Pradesh was carried out. The study included both physico-chemical analysis as well as biological studies of the reservoir. Such studies not only enable us to understand a water body but also help in better utilization of it. This book is an outcome of such a study. The whole study has been presented in the form of seven chapters along with references. The book will be very useful for academicians, researchers and students, working in the fields of limnology and environmental sciences.