| This paper adopts natural rainfall to simulating different vegetation slope surfacesoil erosion happens development process. On slope surface erosion and sedimentprocess were analyzed, focuses on analyzing slope surface soil erosion process middledischarge, sediment concentration, erosion rate, analysis the variation characteristicsof different vegetation, rainfall intensity factor on slope surface soil erosion processesinfluence. Rainfall process changes of slope surface erosion form were observed andstudied, in order to further improve slope surface erosion theory, establishes the soilerosion physical process model provide scientific basis, but also for the preventionand control of soil and water conservation huaihe river dykes rational configuration ofsoil and water conservation measures, formulate measures slope, DAMS, effectivegovernance and realize the soil slope provides scientific basis for sustainableutilization of water and soil conservation production practice, have very importanttheory and production significance.This paper in Anhui Agricultural University agronomy of agriculturalexperimental bases to gather garden of soybean, peanuts, sweet potato three crops,Manila, dwarf lilyturf, safflower sorrel three forages for slope vegetation, to thefollowing content is studied:1. The slope surface runoff production.2. Differentvegetation slope surface runoff duration of the differences.3. The change rule ofrunoff rate.4. The influence of vegetation on runoff.5. Slope surface erosion andsediment process. Quantitative analysis of runoff sediment concentration and erosionand sediment yield rate change rule.6. Vegetation on the influence of soil erosion.The main research results are as follows:1. Rain began after a period of infiltration began runoff, but different vegetationconditions of slope facing the runoff duration affect different. Slope of three crops,soybean vegetation slope surface runoff duration shortest, peanuts, potato slope timesslope surface runoff the longest. And for three kinds of forage slope, the longestrunoff is Manila vegetation slope, dwarf lilyturf next and the shortest is safflowersorrel vegetation coverage of the slope. 2. In slope with rainfall time change flow increase quickly and can be dividedinto two stages. Gently salo With an average rainfall intensity of runoff and theincrease of increased. The three crops, the same rainfall intensity of soybean runoffnext biggest, peanuts, potato slope surface slope followed minimum. And for threekinds of forage for slope in the same rainfall intensity conditions, safflower sorrelvegetation runoff vegetation slope biggest, radix ophiopogonis secondly and runoff isthe grass Manila minimum slope3. Sediment process is relatively complex, presents the characteristics ofmulti-modal many valley. The three crops, soybean slope surface water flow sedimentconcentration, peanuts slope surface relative maximum minimum, potato slopesurface next. And for three kinds of forage for, with the red slurry concentration, thelargest water slopes, grass slope radix ophiopogonis followed on slope surface waterflow sediment concentration in Manila minimum. With the increase of slope sedimentflow increase and rainfall intensity increased.4. Different vegetation slope facing the erosion has a different effect. The threecrops with rain for strong conditions, soybean slope surface erosion on slope surfacesecond largest, peanuts, potato slope surface erosion and the smallest. And for threekinds of forage slope, the red flower with the biggest, erosion and the slurry slopes onslope surface erosion and the radix ophiopogonis commerical and turf Manila slopesurface erosion and the smallest.5. By comparing different vegetation slope of runoff duration, production flowvariation characteristics, sediment concentration and erosion rate variationcharacteristics, we can draw and erosion and used in experiments in the six planting,potato and Manila by the most powerful erosion resistance. |
PDF Full Text Request