1. 贵州师范大学 喀斯特研究院/地理与环境科学学院,贵州,贵阳,550001
2. 贵州省喀斯特山地生态环境国家重点实验室培育基地,贵州,贵阳,550001
3. 国家喀斯特石漠化防治工程技术研究中心,贵州,贵阳,550001
纸质出版:2019
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谭玮颐, 周忠发, 朱昌丽, 等. 喀斯特山区地形起伏度及其对水土流失敏感性的影响——以贵州省荔波县为例[J]. 水土保持通报, 2019,39(6):77-83.
Tan Weiyi, Zhou Zhongfa, Zhu Changli, et al. Topographic Relief and Its Influence on Soil Erosion Sensitivity in Karst Mountain Area—Taking Libo County, Guizhou Province as an Example[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 77-83.
谭玮颐, 周忠发, 朱昌丽, 等. 喀斯特山区地形起伏度及其对水土流失敏感性的影响——以贵州省荔波县为例[J]. 水土保持通报, 2019,39(6):77-83. DOI: 10.13961/j.cnki.stbctb.2019.06.011.
Tan Weiyi, Zhou Zhongfa, Zhu Changli, et al. Topographic Relief and Its Influence on Soil Erosion Sensitivity in Karst Mountain Area—Taking Libo County, Guizhou Province as an Example[J]. Bulletin of Soiland Water Conservation, 2019, 39(6): 77-83. DOI: 10.13961/j.cnki.stbctb.2019.06.011.
[目的] 探究喀斯特高原山区水土流失的特征与空间变化规律,为制定符合喀斯特山地环境的水土流失防治对策提供科学依据。[方法] 以典型喀斯特山区重点生态功能区贵州省荔波县为研究区,综合运用地理空间分析方法,确定提取地形起伏度最佳的分析单元,结合水土流失敏感性评价,分析地形起伏度与水土流失敏感性的空间分布规律及其相互关系。[结果] 基于10 m空间分辨率DEM数据,提取地形起伏度的最佳网格大小为54×54,地形起伏度(RDLS)在0.32~2.12之间;荔波县水土流失敏感主要为微度侵蚀,占县域总面积达88.40%;水土流失敏感性区域主要集中在RDLS为0.7~1.7的分级范围内,RDLS在1~1.5区间对水土流失的响应最敏感,为水土流失敏感性的优势因子区间。[结论] 研究区内RDLS与不同敏感度的水土流失分布具有一定的一致性,总体上水土流失受地形起伏度变化的影响显著。
[Objective] The characteristics and spatial variation of soil erosion in karst plateau mountainous areas were investigated
in order to provide scientific basis for the prevention and control of soil erosion in accordance with the environment of karst mountainous areas.[Methods] Libo County of Guizhou Province
a key ecological function area in typical karst mountainous area
was taken as the research area. The spatial distribution of topographic relief and soil erosion sensitivity and their relationship were analysed by ggeospatial analysis method
to determine the best analysis unit for extracting topographic fluctuation degree
and the evaluation method of soil erosion sensitivity.[Results] Based on DEM data with 10 m spatial resolution
the optimal grid size for extracting topographic relief was 54×54
and relief degree of land surface(RDLS) was between 0.32 and 2.12. The sensitivity of soil erosion in Libo County was mainly slight erosion
which accounted for 88.40% of the total area of the county. In addition
the sensitive area of soil erosion was mainly concentrated in the RDLS range of 0.7~1.7. The RDLS ranged from 1 to 1.5 was the most sensitive response to soil erosion
and thus the dominant factor range of soil erosion sensitivity.[Conclusion] The distribution of RDLS in the study area was consistent with that of soil erosion with different sensitivities. Generally
soil erosion was significantly affected by the change of topographic relief.
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