tudy on Soil Anti-erodibility of Urban Traffic Greenbelt ——Taking Neijiang city as an example

Soils of urban traffic greenbelt such as wooded land, shrubland, and meadow in the Neijiang city were taken as research subjects to examine the anti-erodibility of soil in the traffic greenbelt in the city by analysis of the indices like the drying sieve aggregate, the mechanical composition, water stable index(the K value)and anti-corrosion resistance index. The results show that the corrosion resistance strength the three kinds of soil differ in anti-erodibility, yet all with a declining trend over time. What's more, it is found that the soil anti-erosion indices under the three modes all take a changing trend in the curve of a cubic function with the soaking time. The correlation analysis shows that the water stable index and clay particle, physical clay, the granular sizes of >0.25mm, 2-5mm, 5-7mm are positively correlated with each other. Yet, a negative relation is found in between the water stable index and coarse silt, sand grain, the granular sizes of 0.25-0.5mm, 0.5-1mm, which indicates bigger the soil aggregates size, the less the contents of the clay particle, physical clay, and the bigger the water stable index is, a stronger soil anti-erodibility will be. The anti-erodibility in descending order is pure forest > bush fallow > meadow.