Advances in Hydroscience, Volume 4 covers selected topics encompassing several areas of special interest in hydroscience, including naval architecture, water waves, subsurface water, engineering hydraulics, and stochastic hydrology. This volume is composed of seven chapters, and begins with a summary of the basic principles and theories involved in hovering craft operating over water, which should be of interest to naval architects who may design such vehicles for special purposes. The succeeding chapters deal with the significance of soil moisture theory in the design of foundations and land drainage systems, as well as the developments in understanding the theory of wind-generated waves. These topics are followed by discussions on the mode of operation and different types of hydraulic jumps and the basic probability concepts of stochastic reservoir theory. The final chapter the fundamentals of surface winds, wind fields, and wind stress and their role in formation of storm surge. This book is of value to hydrologists, naval architects, agronomists, and agricultural civil engineers.