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Nanhui tidal flat is a transitional zone situated in a special area between the Yangtze estuary and Hangzhou Bay. Supported by GIS, six topographic maps from 1953 to 2004 are digitalized. Meanwhile, the underwater digital elevation models between different periods are created and analyzed to investigate the topography evolution on Nanhuizui tidal flat. The results suggest: there was distinct erosion...
As one of the most important variables of topography, the quality of extracting slope length has a serious effect on soil and water conservation, soil erosion and environmental assessment studies. Based on the principle of data independent DEM interpretation analysis method, this paper quantitatively studies the error spatial distribution of slope length which is extracted from grid-based Digital...
Water and soil erosion is one of the most serious global environment. In Yulin Distract this phenomenon is very serious. Based on DEM and other data, using RS and GIS technique, based on general soil erosion equation RULSE model, The study has calculated the quantity of invaded soil in different years, completed the spatial distribution picture of the invaded soil, carried on the dynamic research...
The soil erosion intensity and its spatial distribution of Mashezihe watershed located at Bin county in the typical gentle hilly black soil region of Northeast China were studied using the Surface Erosion Grading Indicator (SEGI) method and Universal Soil Loss Equation (USLE) model. Land cover types and vegetation cover fraction derived from the Advanced Land Observing Satellite (ALOS) remotely sensed...
With steep slopes, high mountains, concentrated rainfalls and frequent rainstorms, the agricultural production and economic development of the Wen County, the southernmost county, also heavily damaged by 5.12 Earthquake, of Gansu Province in northwest China, are gravely constrained by serious soil erosion. To make effective soil and water conservation measures, quantitative evaluation of soil erosion...
In arid and semi-arid areas, a large area of soil erosion in the upper reaches will not only aggravate drought of atmospheric and soil, but also induce deterioration of grasslands and desertification. In this paper, as the Shiyang River upper reaches a case, we analyzed how the changes of land use and land cover influence the soil erosion, based on remote sensing satellite date and DEM, using ArcGIS...
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