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Gully erosion of tillage land in northeast China cause mass land degradation and threaten the safety of grain production of China. The relationship between the spatial distribution of gullies and topographic factors, such as slope angle, aspect, slope form, SPI and TWI, as well as land use and lithology are discussed in the Keshan County of Heilongjiang province. The topographic factors are derived...
During the past 50 years, Sanjiang Plain, which is one of the most important areas for commercial production of China, has experienced soil loss due to improper land use. For this study land use maps for 1954 1976 1986 and 2000 were obtained based on Landsat satellite image and historical topographic map along with expert knowledge. DEM data, soil maps and rainfall data were also obtained. Using GIS...
Soil erosion is an important environment disaster in black soil region due to the reclamation in past 50 years. Gullies in black soil region destroy farmland and it is a huge threatens of grain productivity security. This paper adopted Spot5 image to interpret gully distribution of study area in northern Nemoer Basin. Basic topography factors were extracted from SRTM elevation data set. The soil data...
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