Numerical analysis of layout parameters and reasonable design of grape drip irrigation system for stony soil in Xinjiang Uighur Autonomous Region

In order to understand the laws of soil water movement under complex stony soil condition and optimize the design parameters and layout parameters of grape drip irrigation system in Xinjiang Uighur Autonomous Region, field experiments were carried out to determine the appropriate distance between the emitters should be 30 cm. Hydrus-2D numerical model was performed to estimate the hydraulic parameters of stony soil and simulate the soil water distribution characters of surface drip infiltration under different emitter discharge rates and lateral pipeline layout distance styles. According to the simulated wetted body feature and grape root distribution character, the rational discharge rates should be between 2.5 L/h and 3.0 L/h, and the reasonable lateral spacing of drip irrigation pipeline should be 60 cm. The results can provide some guidelines for scientific design and rational filed layout of grape irrigation system under stony soil.