Boughton, Walter C.2013-09-242013-09-241969-020075-952Xhttps://hdl.handle.net/10182/5644Lincoln College, the College of Agriculture of the University of Canterbury, sponsors an active research and teaching programme in hydrology, soil conservation and water resources development. The purpose of these Papers is to communicate research results and new developments in these fields as rapidly as possible, and particularly to report the results of projects undertaken in conjunction by the Department of Agricultural Engineering and the New Zealand Agricultural Engineering Institute. From time to time the opportunity will be taken to publish material originating elsewhere in New Zealand with which the College is associated and which could not otherwise be made available.A method of plotting and contouring grid surveys using a digital computer is described. Contour positions in each square element of a grid survey are determined by linear interpolation between the sides of the square. The resultant shape of ground surface is curvilinear, equivalent to a relaxation net between the sides which connect the four corner levels. Application of the method to surveys for flood irrigation design and other purposes is described, and a copy of the computer programme is given in the Appendix.enLincoln College. New Zealand Agricultural Engineering Institute.contour planscomputer programflood irrigation designagricultural developmentgrid surveyscountouring methodcontour plotswater resources developmentTechnical ReportANZSRC::079901 Agricultural Hydrology (Drainage, Flooding, Irrigation, Quality, etc.)ANZSRC::099901 Agricultural Engineering