Infiltration Process of Purple Soil Slope Cropland under the Condition of Artificial Simulated Rainstorm

According to the research methods such as indoor physical and chemical tests,the article studied the impact of the different rainfall intensity,slope and the quantity of polyacrylamide(PAM) on the purple soil infiltration using artificial rainfall method.The study results showed that: As the enlarge of rainfall intensity,steady infiltration rate had a trend of increase;In the range of 0 ° to 10 °,purple soil surface infiltration increased with the increase of slope.The addition of PAM could promote soil water infiltration with a great degree,it could also improve the steady infiltration rate,but it was not good with the increasing quantity,the infiltration rate was the highest for the 5 g/m2 in this test.