The aim of this book is to illustrate the basic concepts involved in drawing up an irrigation program, and to move from theory to practice by dealing with increasingly concrete problems in the field of and of different irrigation systems.To set up irrigation programs that are more water-efficient, and more acceptable from the point of view of environmental preservation.This book provides :- The basics (hydrological cycle, soil texture, crop water requirements, etc.) needed to understand the phenomena involved;- Tools for reasoning and calculation (balance sheet, water requirements, watering program);- Real-life application examples.This book is a working tool for teachers and students at 2nd cycle (bachelor's degree) and 3rd cycle (professional master's degree) levels, in a wide range of disciplines combining process, mechanical and electrical engineering.