Study On The Soil Erosion Analyzes Of Characteristic And Countermeasure In Dabie-tongbo Mountainous Area

The soil erosion is one of the world main disasters and endangers the human survival and the development main environment question. This article gets the soil erosion data by the stacking analysis of Geography Information System on the TM remote sensing image of the Dabie-tongbo mountainous area from 1995 to 2000, and take as the observation data example in shang-tu-shi towns to analyze the rainfall characteristics to the soil erosion influence from 1995 to 2000 in Huo-shan County. The result indicates: above studies the region to be mild corrodes in the area overall to increase, the moderate above corrodes in the area overall to reduce; The land utilization way change for the cultivated area massive reductions, the forest land and the construction uses remarkably to increase, lawn and water body area small reduction; In under pure rainfall amount change perfect condition, rainfall characteristics and the average soil erosion quantity has a higher relevance. In the article, on the different land utilization way to the soil erosion influence, between the soil erosion intensity type dynamic transformation, the land utilization type and the soil erosion structure relations has conducted the research, And it makes the relevant analysis to the rainfall amount, rains lasted, the rainfall intensity and the soil erosion quantity.The result indicates the most soil erosion of this mountainous area is watererosion. Compared with 1995, the soil erosion in·more than mid-degree reduces 241.65 km~2 in 2000, and its light degree has evidently been increased to 10450.62 km~2; thereinto, the 98.50% of light degree water erosion in 2000 is translated from the tiny degree water erosion in 1995. The soil loss of infield and woodland are the main loss type in this district, and the tiny and light erosion is 95.29% in the total erosion area.The regression analysis indicated that the rainfall amount and the average soil erosion quantity assume two times of multinomials relations, also relevance, the rainfall rank above 50mm produces the soil erosion is obvious. Under the comprehensive condition, the magnitude law obtains the average rainfall intensity and the relative soil erosion quantity assume the certain correlational dependence; The average rainfall intensity and the average soil erosion quantity have no obvious relevance, 60～80mm/h creates the inferior soil erosion most serious centralism. The regression analysis indicated that, equally the rainfall intensity and the average corrosion quantity assumes not the remarkable power function to close. The soil erosion quantity size of the times rains which produces to come under the average rainfall intensity influence at the same time, but also receives rains the lasted very big system. Rains lasted and the relative soil erosion quantity assumes the binomial functional relation, and the compartment basically assumes the positive phase when from 6 to 24h. Creates the soil erosion main centralism from 6 to 24h scope.In addition, according to Weibull experience frequency formula that the experiment obtains basic rainfall standard 27.5mm which rude classificationDabie-Tongbo mountainous area center -------Huoshan County the corrosivenessrains.Experiment also through the soil erosion dynamic change research, and research the influence of the land utilization type and soil erosion intensity, to understand and study the region soil erosion present situation and the change tendency and for the further divides the conservation of water and soil ecology merit energy region to provide rests on. From these In order to study and promoted the district soil erosion synthesis preventing and controlling technology provides the theory basis, provides the important senate for the local sustainable development ,even to promote the socialism new rural reconstruction.Aftertime, we should give attention to protecting the local entirenment with fathering key project, promote the natural restoration ability of vegetation, and stop "fathering with destroying" and carry out long-term synthesis fathering. Moreover also must diligently the perfect conservation of water and soil law construction, the other we should widespread the propaganda and strengthen the project management.