An understanding of Estuaries and estuarine mixing process makes important contributions to the development of water, sediment and biological sciences, and hence is of environmental response in various issues related to pollution. This book provides a comprehensive research in environmental sciences and sedimentation processes, thereby filling a conspicuous gab in the marginal marine sedimentary environment. This book will gives a clear picture about the heavy metal pollution and implications to biological environment. The main descriptive features of commonly occurring processes are covered fully and author indicate how these factors controlled by various environmental processes. The book profusely illustrated with line and surfer drawings, and this this aspect should enhance its usefulness to the readers.