Relationship on the Head Deviation Rate and Laying Length of Porous Tubes

To improve the utilization efficiency of water, the laying length of porous tubes was analyzed. Considering long porous tubes, the irrigation uniformity of porous tubes was studied by analyzing the deviation rate of the working head of porous tubes and through an impact analysis of the deviation ratio of flow rate based on laying length, slope, pressure head, and perforation spacing. Results showed that the deviation ratio of the flow rate could be reduced by decreasing the length of tubes and increasing the slope. The deviation ratio of flow rate was less influenced by pressure head and perforation spacing. A best-laid slope resulted in a longer laying length of the porous tubes, and they were not constant.