This book subject is an ecological insight into a natural limnological ecosystem that was partly affected by anthropogenic operations and also by natural changes whilst having critical impact on the national drinking water supply in Israel. The impact of the anthropogenic and natural parameters on the ecosystem is significant for the sustainability of the ecosystem. The different chapters are giving a scientific-descriptive information and analyses on limnological processes and their impact on water quality. The book chapters cover topics of hydrology and eco-hydrology, limnology, plankton and fish freshwater ecology with conclusions on lake management.