Improved estimation method of soil wind erosion based on remote sensing and geographic information system in the Xinjiang Uygur Autonomous Region, China
Improved estimation method of soil wind erosion based on remote sensing and geographic information system in the Xinjiang Uygur Autonomous Region, China
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DOI：
10.1080/19475705.2017.1386723
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发表时间：
2017-01-01
影响因子：
4.2
通讯作者：
Jiang, Lin
中科院分区：
文献类型：
--
作者：
Guo, Bing;Zhang, Fei-Fei;Jiang, Lin
新疆维吾尔自治区的生态环境保护和经济发展需要详细的土壤侵蚀信息，并采用遥感和地理信息系统技术获得土壤侵蚀的准确分布。提出了一种改进的风蚀估算方法，总体精度达到87.24%。该模型采用6个关键因子：积雪日数、土壤可蚀性、干旱指数、植被覆盖度、土壤结皮指数和风场强度。结果表明，新疆维吾尔自治区土壤风蚀分布广泛。平均侵蚀强度为0.50，为中等侵蚀程度。风蚀强度由西部轻微增加到中东部严重。不同土地利用类型的土壤风蚀平均强度依次为：荒疏植被、开阔灌丛、草地、农田、常绿针叶林、混交林。不同土壤类型土壤风蚀强度差异较大；草地风蚀严重，草地风蚀强度最低。
Detailed information pertaining to soil erosion is required to ensure eco-environment protection and economic development for Xinjiang Uygur Autonomous Region, and remote sensing and geographical information system technologies are adopted to obtain an accurate distribution of soil erosion. An improved estimation method for wind erosion is developed, which proves to be effective with an overall precision of 87.24%. The proposed model uses six critical factors: number of snow cover days, soil erodibility, aridity index, vegetation fraction, soil crust index, and wind field intensity. Results show that soil wind erosion is widely distributed throughout the Xinjiang Uygur Autonomous Region. The average erosion intensity is 0.50, which is determined to be a moderate erosion level. The wind erosion intensity increases from a slight level in the western part to a severe level in the mid-eastern part. The mean intensity of soil wind erosion for varying land use types is ranked in descending magnitude of barren or sparse vegetation, open shrubland, grassland, cropland, evergreen coniferous forest, and mixed forest. There are large differences in soil wind erosion intensities among soil types; grassland has severe wind erosion and Luvic Arenosols has the lowest erosion intensity.