Study On Soil Erosion Law And Soil And Water Conservation Measures Of Constructing Expressway From Yichang To Changyang

In order to make a study of law of soil erosion in the process of expressway construction and have a definite object in view to adopt appropriate soil and water conservation measure system, this paper takes expressway soil erosion as research object and chooses the expressway from Yichang to Changyang situated in west region of Hubei provinces as an example to analyse expressway soil erosion characteristic and influencing factor, impact of highway soil erosion on ecological environment and law of soil erosion occur and development in side slope of expressway.According to the research the soil and water conservation comprehensive measures system of expressway is raised and it contributes to distribution of soil and water conservation measures of similar highway as a reference. The mostly conclusion is as below:1) The characteristic analysis of the expressway soil erosion: Expressway soil erosion is different from conventional soil erosion and other soil erosion of exploitation construction project for its 4 outstanding features, including imbalance of soil erosion distribution in time and space; Presenting either threadiness or pinnate distribution in space; The quantity of soil erosion is large;Erosion form is complicated and frequency of causality soil erosion occuring is large. In research expressway soil erosion forms are mostly water erosion and gravity erosion and the difference of terrain and landforms recreated by expressway construction decides form, intensity and distribution of soil erosion.Human activities were major factor of expressway soil erosion inducing and aggravating soil erosion and expressway construction. Expressway construction made an great impact on soil erosion through changing the factors of terrain, geology, soil, vegetation, hydrology.etc for soil erosion.2)Law of soil erosion of expressway slopeIn the process of expressway construction soil erosion quantity has intimate relation with rainfall, soil and vegetation. Through analyses conclusion can be drawn as below:(1)The change of monthly soil erosion quantity of each observation plot keeps...