This book Irrigation & Agricultural Drainage Engineering is intended as a source book in the area of irrigation and drainage for the students of agricultural engineering in particular and agricultural science in general. However, this book also may be useful for agricultural extension workers and the professional working in this area. The contents of the book will enable one to acquire some basic requirements which an irrigation and drainage manager must have. The contents include basics along with some information toward research achievements, importance and usefulness so that the students get interested to the subject and at the same time help them to attend the institutional and competitive examinations. The book contains good numbers of numerical as example and task to get the students familiar to the requirements, complicacies, and possible remedies in actual working condition. Excepting the traditional broad and short questions, multiple choice questions are also set in every to assist the students in successful preparation for the entrance examinations in PG programs and the competitive examinations like State and Union PSC, etc.