Optimization and Parameter Analysis of Pipe Network Layout in Micro Irrigation Field

Micro irrigation project is an important means to promote agricultural water-saving irrigation, and reasonable design of field pipe network parameters is an important link in water conservancy calculation. To explore the optimal layout scheme of field pipe network to meet the safety of irrigation pipeline operation in the field irrigation unit area. A mathematical model for the optimization design of two-way field pipe network is established, which takes the minimum pipeline investment per unit area as the objective function and meets the requirements of safe operation of pipelines. The optimization calculation of typical area in Yongshuyu irrigation area is carried out by using genetic algorithm, and the drip irrigation system is optimized. Compared with the original design, the project cost per unit area is reduced by 64.8%, and the capillary investment accounted for 70.6% of the community investment, and the diameter of capillary and the design flow of emitter are analyzed The influence of distance between emitters on the optimization results of field pipe network. The results show that it is more economical to use smaller diameter capillary and larger diameter branch pipe when the shape of irrigation unit is not limited. In the case of a certain capillary diameter, changing the emitter design flow and emitter spacing has little effect on the investment cost of unit area pipeline; under the joint action of emitter design flow and emitter spacing, smaller emitter design flow and larger emitter spacing can reduce the investment cost of unit area pipeline. The research results can provide the basis for the design of drip irrigation system under different crop types, planting methods and water supply capacity, and provide reference for enterprises to develop irrigation pipelines of different specifications.