Management, Operation and Maintenance of Irrigation and Drainage Systems (Manual No. 57) is a revision of the 1980 publication Operation and Maintenance of Irrigation and Drainage Systems. This manual presents significant new innovations and modifications of procedures that have been implemented throughout the irrigation and drainage industry, particularly in areas of management and maintenance strategies, environmental benefits and safety practices. It is intended to help irrigation and drainage districts to minimize costs while maximizing production with available resources. In addition, this revised manual should be of interest to anyone associated with irrigation and drainage systems throughout the world. endorsement, recommendation, or warranty thereof by ASCE. ASCE makes no representation or warranty of any kind, whether express or implied, concernina the accuracy, completeness, suitability or utility of any information, apparatus, product, or process discussed in this publication, and assumes no liability therefor.Anyone utilizing this information assumes all liability arising from such use, including but not limited to infringement of any patent or patents.