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在土地平整设计中,我们一直使用中心法和四点法。《灌溉排水》1991年第2期刊载的三点法土地平整设计方法,其适应性和精确度都比中心法和四点法好,其缺点是设计方法比较复杂,为了解决这一矛盾,我们编制了三点法土地平整设计程序,使土地平整设计从数据输入——计算——成果输出一体化,全部由计算机完成;因而使得三点法在我区被广泛推广使用。 此程序自应用以来,深受设计人员的欢迎,并在使用过程中总结出以下几项优点:①适用于三角形网格(过去尚无用于三角形网格土方计算方法),②设计精度提高4％
In land leveling design, we always use the center method and the four point method. The three-point method of land leveling design, which is described in “Irrigation and Drainage”, No. 2, 1991, has better adaptability and accuracy than the center method and the four-point method. The disadvantage is that the design method is complicated. In order to solve this contradiction, we The three-point land leveling design program was compiled. The land leveling design was integrated into the data input-calculation-result output, all of which were completed by the computer. As a result, the three-point method was widely used in our district. This program has been welcomed by designers since its application. The following advantages have been summarized in the course of its application: ① for triangular grids (there is no method for calculating the earthwork in triangular grids in the past); ② the design accuracy is improved by 4%