This book is intended to serve as a medium for dissemination of scientific and technical information emanated from research on weather variability, soil and water resources to the world. It is aimed at providing technical guidelines to those who involved in the practice of soil and water engineering, Irrigation and drainage engineering, environmental science and engineering, farmers, field assistants, engineers, researchers, students and decision makers. It contains detailed scientific and engineering approaches to: Investigate and analyze the water use pattern within River basin; Evaluate...