Hydrology is the field of science concerned with the study of the movement, management, and distribution of Earth's water. Studies on watershed sustainability, water cycle, and water resources as well as drainage-basin and water quality management fall under the umbrella of this field. Hydrology has three major subdivisions - marine hydrology, groundwater hydrology and surface water hydrology. Advances in hydrology serve to further the solution to natural disasters and aid in environmental preservation and water management. This book contains some path-breaking studies in the field of hydrology. It outlines the processes, applications, and recent advances in hydrology in detail. This book will serve as a reference to a broad spectrum of readers.