首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Assessment of Soil Erosion at Multiple Spatial Scales Following Land Use Changes in 1980–2017 in the Black Soil Region (NE) China
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Assessment of Soil Erosion at Multiple Spatial Scales Following Land Use Changes in 1980–2017 in the Black Soil Region (NE) China

机译:1980 - 2017年土地利用变化在黑土利地区(NE)中国的土地利用变化下的多空间尺度土壤腐蚀评估

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摘要

Impact of land use and land cover change on soil erosion is still imperfectly understood, especially in northeastern China where severe soil erosion has occurred since the 1950s. It is important to identify temporal changes of soil erosion for the black soil region at different spatial scales. In the present study, potential soil erosion in northeastern China was estimated based on the Revised Universal Loss Equation by integrating satellite images, and the variability of soil erosion at different spatial scales following land use changes in 1980, 1990, 2000, 2010, and 2017 was analyzed. The regionally spatial patterns of soil loss coincided with the topography, rainfall erosivity, soil erodibility, and use patterns, and around 45% of soil loss came from arable land. Regionally, soil erosion rates increased from 1980 to 2010 and decreased from 2010 to 2017, ranging from 3.91 to 4.45 Mg ha−1 yr−1 with an average of 4.22 Mg ha−1 yr−1 in 1980–2017. Areas with a rate of soil erosion less than 1.41 Mg ha−1 yr−1 decreased from 1980 to 2010 and increased from 2010 to 2017, and the opposite changing patterns occurred in higher erosion classes. Arable land continuously increased at the expense of forest in the high-elevation and steep-slope areas from 1980 to 2010, and decreased from 2010 to 2017, resulting in increased areas with erosion rates higher than 7.05 Mg ha−1 yr−1. At a provincial scale, Liaoning Province experienced the highest soil erosion rate of 9.43 Mg ha−1 yr−1, followed by Jilin Province, the eastern Inner Mongolia Autonomous Region, and Heilongjiang Province. At a county scale, around 75% of the counties had a soil erosion rate higher than the tolerance level. The county numbers with higher erosion rate increased in 1980–2010 and decreased in 2010–2017, resulting from the sprawl and withdrawal of arable land.
机译:土地利用和土地覆盖变化对土壤侵蚀的影响仍然不完全理解,特别是在中国东北部,自20世纪50年代以来发生严重的土壤侵蚀。重要的是在不同空间尺度上识别黑土区域的土壤侵蚀的时间变化。在本研究中,通过整合卫星图像,基于经修订的普遍损失方程估计了中国东北地区的潜在土壤侵蚀,以及在土地利用后的不同空间尺度下的土壤侵蚀变异,1980年,1990年,2000年,2010年和2017年分析了。土壤损失的区域空间模式恰逢地形,降雨腐蚀,土壤易用和使用模式,耕地来自耕地的约45%。地区,土壤侵蚀利率从1980年到2010年增加,从2010年到2017年下降,从3.91到4.45 mg HA-1 YR-1,平均为4.22 mg HA-1 YR-1,1980-2017。土壤侵蚀率小于1.41毫克HA-1 YR-1的地区从1980年到2010年下降,从2010年到2017年增加,而相反的变化模式发生在更高的侵蚀课程中。耕地在1980年至2010年的高度高度和陡坡地区的森林费用不断增加,从2010年到2017年下降,导致侵蚀率高的区域增加到7.05 mg HA-1 YR-1。在省级规模,辽宁省经历了最高土壤侵蚀率为9.43毫克HA-1 YR-1,其次是吉林省,东部内蒙古自治区和黑龙江省。在县级,大约75%的县的土壤侵蚀率高于公差水平。侵蚀率较高的县数量在1980 - 2010年增加,2010 - 2017年下降,由蔓延和耕地撤离导致。

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