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- W2371997787 abstract "Supported by 3S technology,this paper brought forth the land use change in Huangfuchuan Watershed from 1987 to 2000,then studied the distribution rules of soil erosion under different land use patterns quantificationally by Universal Soil Erosion Equation(USLE) during that period,and emphasized the impact of changes of land use pattern on soil erosion in the watershed.The results showed:(1) In the recent ten years,the general tendency of land use change in the study area was that the proportion of urban land,woodland,cropland and shrub increased gradually with the speed descending,and that the proportion of water,grassland,sandy land and bare rock shrunk with the highest extent of water.During this course,the watershed pattern of land use was under the tremendous pressure from the standing conflict,which burst out between the rapid urbanization,economic development and the conservation and rebuilding of ecological environment.This status would survive for a long time in the future,and moreover,the distinct decline of water area would be the bottleneck of above contradiction;(2) With the change of land use pattern,the annual modulus of soil erosion decreased rapidly from 16160.72t/km~2 in 1987 to 13943.32t/km~2 in 2000.According to the annual modulus of soil erosion in the same year,different land use types in Huangfuchuan Watershed arrayed with the order: bare rock sandy land cropland grassland woodland shrub,indicating that woodland and shrub were the preferred measures for vegetation restoration and the reduction of soil erosion.Furthermore,the alteration of sandy land and bare rock would be the key problem of comprehensive harnessment of soil erosion,which could not be overlooked;(3) The effect of soil and water conservation was significant in the recent ten years,however,due to the high proportion of sandy land and bare rock and the proliferating cropland in the watershed,the annual modulus of soil erosion were still higher than permissible soil erosion amount between 3700t/km~2 and 6900t/km~2.The ecological environment of watershed would be in the status of insecurity,thus,the watershed pattern of land use must be optimized to meet the requirement of ecological security.Generally,this paper emphasized the impacts of different land use types and patterns on soil erosion of watershed,illuminated the adjustment or optimization of land use pattern,and improved the technical system of soil erosion assessment for the simulation and forecasting of land use change,which has wide application in the future." @default.
- W2371997787 created "2016-06-24" @default.
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- W2371997787 date "2006-01-01" @default.
- W2371997787 modified "2023-09-26" @default.
- W2371997787 title "Land use change and soil erosion evaluation in Huangfuchuan Watershed" @default.
- W2371997787 hasPublicationYear "2006" @default.
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