Water is one of the most important and abundant resources available on earth. Although water covers almost seventy one percent of earth but the portable water is scarce and unevenly distributed. Hydrology is the study of quality, distribution of water on earth and other planets of the planetary system. Engineering hydrology is the applied part of hydrology and one of the sub-fields of civil engineering. It commonly includes water supply, urban drainage, wastewater treatment, river management and coastal protection, preventing floods and lessening the effects of floods, droughts and other natural disasters, etc. This book is a compilation of chapters that discuss the most vital concepts and emerging trends in the field of hydrological engineering. It explains the principles, models and applications of this field in detail. This book explores all the important aspects of this subject in the present day scenario and also provides a comprehensive overview of the field. Scientists and students actively engaged in this area will find this book full of crucial and unexplored concepts.