| On the basis of the finite element method and the dynamic partitioning method, an optimal design method of the pipe network of micro-irrigation systems was brought forward. At first, the method used the finite element method to design the combination plan of submains and hollow forgings capable of meeting with the requirement of the douches in a micro-irrigation system that the water flux and water-discharging uniformity of the douches be equilibrated, and the pressure heads of the correspondent submain units; next, the parameters of the design and the pressure heads were input into the dynamic programming model and then the optimal combination design of the diameters of various orders of micro-irrigation pipes in the system as well as the pressure heads necessary to operate the system was obtained. Meanwhile, a case adopting the optimal design method was presented and proved that the method was simple and convenient in operation. |