Application of Least‐Squares Land Leveling

A least-squares land-leveling program written for use on microcomputers allows flexibility in design that was not previously available. The user can specify six different types of land-leveling conditions common under surface irrigation. Slope and land leveling cut-depth limitations can also be specified. Computations can be made for irregularly shaped fields and rectangular fields with equal ease. The output gives full information on earthwork volumes and costs, and the maximum cut and fill depths. Cut and fill depths at the boundaries of the field are calculated for marking stakes to guide construction. If slopes, control elevations, or depths of cut are specified, the results will give the least cost but not the minimum cost that would result from a strictly least-squares solution.