Research on interference infiltration characteristic test of surface drip irrigation

A field drip irrigation interference infiltration was conducted in hillside drip irrigation jujube field in Mizhi County to study the effect of different irrigation techniques including different drip discharge,drippers spacing and irrigation water volume on the characteristic of surface drip irrigation and the shape of wetted body.The results show that wetted body horizontal diffusion radius and infiltration depth increase with the drip flow increasing.And they both have remarkable relational expression of power function with infiltration time.Under the condition of point source drip irrigation,drip discharge,drippers spacing and irrigation water volume all have influence on the wetted body size and shape.In the same position of a dripper's two sides,when infiltration time at 120 mins,the two parts differ to 2.8 cm and at the end of the irrigation the phase difference between the two parts reach 3.5 cm.Under the condition of different drip discharge with every two drippers have the same space,the time of interference infiltration resulted by the low flow rate delayed and formed a more flat shape of wetted body,while increasing irrigation water discharge rate or narrow drippers' spacing can effectively improve the uniformity of wetted body.