The Research Of PAM And PG Effects On Runoff And Soil Erosion Under Simulated Rainfall

To explore the effect of chemical measures in controlling soil erosion on the Loess Plateau where lack of water, the test will use simulated rainfall, dispose the5°,10°,15°slope by PAM and PG in9different treatments. Mix PAM and PG with suitable amount of fine soil,then broadcast directly on the bare slope land, make sure the thickness of cover reached1mm, to study on its effection on the slope surface runoff and soil erosion, after analyzing one can draw the following conclusions:(1)No matter what kind of grade, what kind of treatment, the runoff firstly increases,then gradually stabilized with time.(2)The influence of runoff with different treatments on different slopes is different. On the slope of5°and10°, separate application of2g/m2PAM, can reduce39percent and41percent of the runoff.1g/m2PAM and100g/m2PG work well on the slope of15°,that the runoff can reach40percent.(3)Treated with PAM and PG, the soil erosion is obviously less than that of the check test group, it can extremely reduce erosion, the figure is put at97pecent. To consider from the application standpoint, a separate application of2g/m2of PAM can achieve a better reduction of erosion.(4)The result of Variance analysis showed that the effect of slope and the dosage of PG on runoff reached significant level. Slope has significant effects on soil erosion. Difference analysis of the slopes and different treatments showed that there considerable differences in the different treatments. Under different treatments, the relationship between slope and runoff, conforms with an second-order polynomial, while the relationship between slope and runoff, conforms with an exponential function.