Application Of Soil And Water Loss Test Under Dripping

In recent years,with the rapid development of science and technology,various new technologies have been applied and brought new problems.Photovoltaic agriculture as a highly efficient use of land resources also exists.Plate-shaped photovoltaic array areas are hit by soil due to raindrops.The effect of showering and the thin layer of water flowing from the bead curtain on the edge of the solar panel caused different soil erosion patterns.However,there are few studies on this issue,and the corresponding water and soil conservation measures are rarely involved.The study of soil erosion under the action of leaching and the discussion of the inherent laws of soil erosion and soil erosion under this type of model have certain theoretical and practical values.The dissertation studied the red soil in south area of Anhui Province,silty clay in the central of Anhui Province and silt in north area of Anhui Province,and considered the impact factors of different soil erosion.Through indoor artificial rainfall simulation experiments,the flow of different types of soil under the action of dripping was studied.The characteristics of sediment production and hydrodynamic parameters,the relationship between soil erosion and its major influencing factors(rain strength,slope,and plant coverage),and the mechanism of erosion and sediment production were revealed.The main results of the paper are as follows:(1)In this paper,through the analysis of the micro-state of the slope under each experimental condition,it is concluded that under the conditions of small rainfall intensity and slope,the external force of the soil structure caused by the slope is mainly the function of “dripping” in the dripping.When the rainfall intensity and slope increase continuously,the effect of “leaching ” begins to become prominent,and gradually plays an important role in causing the soil erosion on the slope.The greater the rainfall,the greater the effect of “leaching”.(2)Under different conditions of rainfall intensity,slope,and plant coverage,the runoff rate and runoff rate under different leaching and runoff conditions in different soil runoff communities showed the trend of continuous fluctuation and rainfall trend with runoff duration.Runoff The degree of fluctuation of the curve increases with the increase of rain intensity and the decrease of plant coverage.(3)The runoff and sediment yield patterns of three different soil runoff communities are similar to rain intensity,slope,and plant coverage,but there are some differencesbetween the runoff indexes.Among them,the time of initial runoff on the slope shows the fastest in the silt area,the slowest in the red loam area,and the average runoff rate is the smallest in the red soil area and the largest in the silty soil area.The average sand production rate is the lowest in the silty clay area and the red soil area maximum.(4)When the vegetation coverage is the same,the average runoff rate and average sediment transport rate of each plot increase with the increase of rainfall intensity and slope;when the vegetation coverage is not the same,the above indicators decrease with increasing plant coverage.However,with the increase of rain intensity,the gap between the average runoff rate under the influence of coverage and the average runoff and sand production rate gradually narrowed.When the experimental rainfall intensity is the same,the average runoff rate and average runoff and sediment yield of each plot increase with the increase of slope,and decrease with the increase of vegetation coverage.The increase of plant coverage increases the deceleration rate of the above indicators.(5)Regression analysis results show that the runoff shear force,water flow(runoff)power,and unit flow(runoff)power can all be expressed by a composite linear function of rainfall intensity,slope,and plant coverage,where unit flow(runoff)power The best fit to rainfall intensity,slope,and plant coverage was the second highest,followed by runoff shear and water flow(runoff)power.According to regression fitting results,the effect of rain intensity on runoff shear force and flow(runoff)power is greater than that of slope,and the effect of slope on unit flow(runoff)power is greater than that of rain.