Spatial Autocorrelation Patterns and Influencing Factors of Soil Erosion of Small Watershed in Bare Feldspathic Sandstone Region

Yang Zhenqi; Guo Jianying; Qin Fucang; Liu Tiejun; Zhang Tiegang

doi:10.13961/j.cnki.stbctb.2021.02.008

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Spatial Autocorrelation Patterns and Influencing Factors of Soil Erosion of Small Watershed in Bare Feldspathic Sandstone Region

- Spatial Autocorrelation Patterns and Influencing Factors of Soil Erosion of Small Watershed in Bare Feldspathic Sandstone Region
- Bulletin of Soiland Water Conservation Vol. 41, Issue 2, Pages: 58-65(2021)
- 作者机构：
  
  1. 水利部牧区水利科学研究所,内蒙古,呼和浩特,010020
  2. 内蒙古阴山北麓荒漠草原生态水文国家野外科学观测研究站,内蒙古,呼和浩特,010020
  3. 内蒙古农业大学沙漠治理学院,内蒙古,呼和浩特,010019
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.02.008
  CLC： S157.1
- Published：2021
- 稿件说明：
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Yang Zhenqi, Guo Jianying, Qin Fucang, et al. Spatial Autocorrelation Patterns and Influencing Factors of Soil Erosion of Small Watershed in Bare Feldspathic Sandstone Region[J]. Bulletin of Soiland Water Conservation, 2021, 41(2): 58-65.
DOI：

Yang Zhenqi, Guo Jianying, Qin Fucang, et al. Spatial Autocorrelation Patterns and Influencing Factors of Soil Erosion of Small Watershed in Bare Feldspathic Sandstone Region[J]. Bulletin of Soiland Water Conservation, 2021, 41(2): 58-65. DOI： 10.13961/j.cnki.stbctb.2021.02.008.

摘要

[目的] 研究裸露砒砂岩区小流域土壤侵蚀空间自相关特征及影响因素，为科学指导植被建设，减轻入黄泥沙提供理论指导。[方法] 以裸露砒砂岩区鲍家沟小流域为研究对象，运用地统计学和灰色关联理论相结合的方法，研究裸露砒砂岩区小流域土壤侵蚀空间自相关特征及影响因素。[结果] ①研究流域土壤侵蚀模数具有显著的空间自相关性（Z值为136.87），侵蚀强度高值聚集区主要位于基岩大幅出露的区域，低值聚集区主要分布在坡面。②以鲍家沟小流域为代表的裸露砒砂岩区典型流域，流域内的优势景观为裸露基岩景观，其次为大面积的沙棘林景观。③高值聚集区与斑块面积分形维数的关联系数最高（为0.774），低值聚集区与坡度关联程度最高。[结论] 地形是导致植被景观破碎化并决定水力侵蚀强度的主要因素，而在地形平缓的地带，植被景观的联通程度则是限制水力侵蚀发生发展的主要因素。

Abstract

[Objective] The spatial autocorrelation and influencing factors of soil erosion were studied

in order to provide references for vegetation construction and reducing coarse sand into Yellow River.[Methods] Through geostatistics analysis and grey relation analysis

The spatial autocorrelation and influencing factors of soil erosion in Baojiagou watershed in bare feldspathic sandstone region were studied.[Results] ① There was a significant spatial autocorrelation of the soil erosion intensity in the watershed

with a Z of 136.87. ② Baojiagou small watershed was the most typical watershed among bare feldspathic sandstone region. The dominant landscape in the basin was bare bedrock landscape

followed by a large area of Hippophae rhamnoides artificial vegetation landscape. ③ The area weight fractal index distribution had the most significant influence on high-high agglomerations

with associated degree of 0.774. And slope had the strongest correlation with low-low agglomerations.[Conclusion] Terrain is the main factor that leads to the fragmentation of vegetation landscape and determines the intensity of hydraulic erosion. In the gentle terrain

the connectivity of vegetation landscape is the main factor restricting the development of soil erosion.

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