The distribution of
Soil Erosion', 1, 1595917)"; href="/tags/soil-erosion/">soil erosion has obvious characters of
spatial change, and studying the spatial change law is important for scientific prevention of soil erosion. Loess Plateau, situated at E100°52′～114°33, N33°41′～41°16, is a part of Northwest China. For a long time, severe soil
Erosion not only has produced a great impact on agriculture in this area, but also silted up the reservoirs and riverbeds in the lower reaches, so it has been becoming the most important cause seriously damaging the ecological system of the
Loess Plateau and the near areas. The main factors affecting soil erosion are precipitation, topography and vegetation. The
precipitation is classified seven grades and there exists a close relation between the precipitation and soil erosion in Loess Plateau land-scale. The relationship of the precipitation and soil erosion in Loess Plateau is discussed through using the spatial overlay statistics for the soil erosion and precipitation data based on Geographical information system. The results show that the soil erosion exist under different precipitationconditions in Loess Plateau, water-wind erosion accounts for 55.76%of all kinds of erosions in precipitation
grade 1. The proportions of water erosion andwind erosion are approximate in precipitation grade 2 and 3. Water erosion dominates from precipitation grade 4 to grade 7, accounting for 82.54%, 98.66%, 99.53%and 100%, respectively. Frozen erosion distributes from precipitationgrade 2 to grade 6. Water erosion, wind erosion and water-wind erosion indices in precipitation grade 4, being 406.84, 665.9 and 723.78, respectively, are bigger than those in the rest precipitation grade. These results can provide scientific evidences for the protection, utilization, recovery and reconstruction of Loess Plateau and demonstrate the effectiveness of studying the relationships ofthe precipitation and the soil erosion by combination of Geographical Information System and landscape ecological method.
More abstracts about the Soil Erosion Characteristics under Different Precipitation Conditions in Loess Plateau