基于地理探测器的江苏省沿江地区土壤侵蚀定量分析
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S157.1, P208

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国家自然科学基金项目“坡式经济林地土壤水分运移动态及内在机理”(32071840);江苏省“333工程”科研项目(BRA2019069);江苏省水利厅项目“江苏省降雨侵蚀力与植被覆盖因子研究”(2020002)


Quantitative Analysis of Soil Erosion Along Yangtze River in Jiangsu Province Based on Geographic Detector
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    摘要:

    [目的] 研究江苏省沿海地区土壤侵蚀空间分布特征,识别主要影响因素并开展驱动力因子定量归因,为该区域水土流失防治与生态环境建设提供科学指导。[方法] 以江苏沿江地区为对象,基于高分辨率遥感影像、数字高程模型和长系列降雨等数据,采用中国土壤流失方程、地理探测器等方法,探索土壤侵蚀空间分异性的主导影响因子及其交互作用影响程度,识别土壤侵蚀高风险区域。[结果] ①平原区与山丘区土壤侵蚀均以坡度与土地利用类型为主导因素。茶园的土壤侵蚀以植被覆盖度为主导,其他类型土地的土壤侵蚀均以坡度为主导因子。②土壤侵蚀的主导交互作用为坡度叠加土地利用类型。茶园与草地主导交互作用因子为坡度叠加植被覆盖度,其他类型土地的土壤侵蚀主导交互作用因子为坡度叠加降雨量。③果园、茶园、林地与生产建设活动扰动地的土壤侵蚀高风险区域位于坡度>20°,降雨量1 300~1 400 mm,植被高覆盖度的丘陵山区。[结论] 地理探测器操作简便,结果包括单因子影响、两因子交互作用及风险区域分析。江苏省生产建设活动扰动地、园地的水土流失问题应引起密切关注。

    Abstract:

    [Objective] The spatial distribution characteristics of soil erosion was explored, the main influencing factors were identified and quantitative attribution of driving force factors were carried out, in order to guide regional soil erosion control and ecological environment construction. [Methods] Taking the area along the Yangtze River in Jiangsu Province as the research object, based on high-resolution remote sensing images, digital elevation models, and long series of rainfall data, the methods of Chinese soil loess equation (CSLE) and geographic detectors were used to explore the dominant influencing factors and interactions of the spatial variability of soil erosion, to identify areas with high risk of soil erosion. [Results] ① Slope and land use types dominated soil erosion in plain and hilly areas. The soil erosion of tea gardens was dominated by vegetation coverage, and soil erosion of other types of land use was dominated by slope. ② The dominant interaction of soil erosion was slope superimposition of land use types. The dominant interaction factors between tea garden and grassland were slope and vegetation coverage, and the dominant interaction factors for soil erosion of other types were slope and rainfall. ③ High-risk areas of soil erosion in orchards, tea gardens, woodlands and areas disturbed by production and construction activities were located in hilly mountainous areas with slopes> 20°, rainfall of 1300~1 400 mm, and high vegetation coverage. [Conclusion] The geo-detector is easy to operate. The results include single factor influence, two factor interaction and risk area analysis. Close attention should be paid to the problems of soil erosion in areas disturbed by production and construction activities and garden plots in Jiangsu Province.

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吴镇宇,罗梦琦,郭红丽,吴芳,黄昱楠,戴玉婷,刘霞.基于地理探测器的江苏省沿江地区土壤侵蚀定量分析[J].水土保持通报,2022,42(2):184-188

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  • 收稿日期:2021-07-06
  • 最后修改日期:2021-11-08
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  • 在线发布日期: 2022-05-26
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