Abstract：The indoor water infiltration test was used to analyze the influence of different residual film density and size on the migration of wet front by setting 6 residual film size levels, namely, 0.25, 0.50, 1.00, 2.00, 4.00, 8.00 cm2, and 4 residual film density levels, namely, 60, 180, 300, 420 kg/hm2, and no film control treatment. The results show that the residual film can accelerate the infiltration process and promote the infiltration in 1.53 g/cm3 clay loam. With the increase of residual film density, the area of single residual film corresponding to the maximum and minimum infiltration duration increases, and the infiltration promoting effect decreases gradually. When the residual film density is low, the influence of residual film area on the depth of wetting front is greater than that of residual film density. When the residual film density is high, the influence of residual film density is enhanced. When the area of single residual film is 0.25 cm2, the infiltration duration first decreases and then increases with the increase of residual film density, reaching the minimum value at 180 kg/hm2. After the residual film with a single area less than or equal to 0.25 cm2 is mixed into the soil, a new soil is formed, which has unique physical properties.
李玥,王春霞*,金嫣婧,何新林. 残膜对土壤水分渗吸过程中湿润锋的影响[J]. 排灌机械工程学报, 2022, 40(2): 196-203.
LI Yue,WANG Chunxia*,JIN Yanjing,HE Xinlin. Effects of residual plastic film on wetting front during soil water imbibition. Journal of Drainage and Irrigation Machinery Engin, 2022, 40(2): 196-203.
