Title: Soil Erosion Characteristics under Different Precipitation Conditions in Loess Plateau
Abstract: The distribution of 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.
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot