This study includes the preparation of a computer program for working the overlapping of sprinklers using the Fortran Programing where the program deal with one sprinkler data in the field and convert this data to four sprinklers working together in the field and simulated the reality of the work sprinklers in the field by different dimensions for both distance between sprinklers (S), the pipe lines (L) with the four sprinklers arrangement and finding the results of the Christensen value (CU), the efficiency and adequacy of the irrigation (considering that the net depth of irrigation NDI equals the average depth of water given to the field), for each cases. The largest values for (L × S) of the field depend on the value of (CU ) not less than (80%). The results of 83.888 and 86.666 for the first experiment by two shapes triangle and rectangle respectively, while the second experiment we got 85.06 and 80.95 in same way by shapes (triangle and rectangle) respectively, also the in third experiment the results appear 81.9 and 82.53 for the distribution of triangle and rectangle respectively, which are good values for the largest irrigated area of the filed, economically in the design of the pipe line. The irrigation efficiency is high for all values exceeded 90%. Through the data of CU and efficiency of the addition of water, the equation equal (CU% = 2*Efficiency % -1) with (R2 = 1). Cu%=2EFF%-1.