The engineering as well as management of water resources are described in this book. Hydrology is a scientific field which deals with the processes governing the exhaustion and renewal of water resources of the earth's land areas. The aim of this book is to combine the latest advancements in hydrology and the engineering of water resources. It discusses surface water and groundwater modeling, and covers various topics related to the management of surface water and groundwater resources. Overcoming the impact of climate change on water resources is also presented in the book. Other topics discussed are the interpretation of field knowledge, advancement of models, the usage of computational models based upon analytical and numerical techniques, evaluation of model performance and their usage for predictive purposes. This book will be beneficial for students and professionals dealing with this field.