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The Shuttle Radar Topography Mission (SRTM) C-band is an important elevation data at regional scale. The 1″ SRTM elevation data has been released in 2014 over China. A detailed evaluation of 1″ SRTM data in China is still lacking. In this paper, the 1″ SRTM data quality is assessed by comparing with the 25m DEM data based on 1∶50000 scale topographic maps taking loess hilly area in China as an example...
The change of terrain parameters with resolution of DEM (Digital Elevation Model) is one of research hotspots in the research fields of hydrology and soil erosion. However there is a lack of scientific explanation on mechanism of this phenomenon. In this paper, a typical Loess Hilly area in the Loess Plateau was taken as study area. Geostatistics and Digital Terrain Analysis (DTA) were used in order...
Terrain parameters are often extracted by down-scaling a lower resolution DEM at regional scale. The 1″ SRTM (Shuttle Radar Topography Mission) elevation data is used widely at regional scale in terrain analysis. Slope is one of the most important terrain parameters. However, compared with the higher resolution slope surface, slope based on 1″ SRTM elevation data reduced because of the relative lower...
In order to reduce the massive soil erosion and to ensure sustainable development, the Chinese central government planned revegetation measures to reduce these environmental problems-especially in the Loess Plateau. This revegetation process will not only result in less soil erosion in the coarse sandy hilly catchments (CSHC), but also less runoff due to increased evapotranspiration (ET). A water...
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