Slope Soil Erosion Intensity Spatial Characteristics And Soil Erosion Process Based On Magnetic Measurement

Soil erosion and soil subsidence degradation that is caused by soil erosion is a important environment problem in the world. This problem is more serious in the middle part of Shandong province. Therefore, it is very important to study soil erosion law in this area. It is very important to guide agriculture production and build beautiful country.But the soil erosion law studying method we used in the past time, have some shortcomings. So, it is difficult to study soil erosion law using these methods. But, the magnetic tracer method is a new method to study soil erosion. Using this method, we can study the soil erosion law carefully and deeply. This method is being widely used in the world, because this method is simple, quick, exact and low-cost. In this study, we take measurement, sampling, nature rainfall experiment and simulate rainfall in field and simulate rainfall experiment, nature rainfall experiment, physical analysis, chemical analysis in lab to study the soil erosion law of the middle part of Shandong province.In this study, we studied the susceptibility spatial characteristics of slope soil and profile soil, the soil erosion intensity spatial characteristics and the relationship between both of them. We study the effect of soil physical and chemical characters to susceptibility of slope soil with different erosion intensity and study the law of soil susceptibility evolution mechanism after rainfall. And in this study, we develop a new type soil erosion magnetic tracer to study soil erosion using fly ash ,cement and water. And we have tested its applying effect in room and file. In this study, we have used this magnetic tracer to study the soil erosion process in the middle part of Shandong province.The main results of this study as follows:1 The spatial characteristics of slope soil erosion intensity and susceptibility, and their relationshipThrough studying the spatial characteristics of slope soil erosion intensity and susceptibility, we find out the relationship between soil erosion intensity and soil susceptibility. In this study, we choice the small watersheds of Taian city and Qufu city to measure the slope soil erosion intensity and susceptibility of different slope and different parts of slope in different small watershed. And, we find out that the slope soil susceptibility variation is like wave, from the upper part to the lower part of the slope. And the law is the soil susceptibility of lower part of the slope is higher than the upper part of the slope. It show that the susceptibility of sediment area is higher than erosion area of the slope. And ,at the same time, we can see the soil susceptibility of woodland is higher than grassland, and the susceptibility of grassland is higher than farmland in the middle part of the slope. It shows that the soil susceptibility is higher and higher with vegetation resume and the soil erosion intensity decreasing. The soil erosion intensity of slope upper part is higher than slope lower part, the farmland soil erosion intensity is higher than grassland and the soil erosion intensity...