The interactions referred to above require large enough computational commitments that they are only feasibly evaluated with hand-held programmable calculators or microcomputers. As a result, the procedures outlined herein have been presented so they can be applied directly via computer. Some of the material used to develop this paper is included in more theoretical texts of the writer's. Occasionally, direct quotes and figures have been extracted without citation in order to minimize the diversions encountered by the reader. When the work of others has been used, more careful attention to the detail of the citation has been given.
Surface irrigation is a complex subject which many have investigated and written about.
The purpose of this guide was not to review the technical literature exhaustively and many valuable works are not cited, but it is hoped that the essence of surface irrigation evaluation and design practice has been captured.