Zhao Wenzhuo,Qin Fucang,Dong Xiaoyu,et al.Relationship Between Gully Slope Slumping Erosion Characteristics and Topographic Factors in Bare Sandstone Area[J].Research of Soil and Water Conservation,2024,31(05):155-163.[doi:10.13869/j.cnki.rswc.2024.05.012]
裸露砒砂岩区沟坡泻溜侵蚀特征与地形因子的关系
- Title:
- Relationship Between Gully Slope Slumping Erosion Characteristics and Topographic Factors in Bare Sandstone Area
- 文章编号:
- 1005-3409(2024)05-0155-09
- 分类号:
- S157
- 文献标志码:
- A
- 摘要:
- [目的]研究沟坡泻溜侵蚀和地形因子的关系,可为裸露砒砂岩区沟坡泻溜侵蚀机理和侵蚀灾害监测提供理论参考。[方法]选取泻溜侵蚀严重的砒砂岩区为研究区域,基于野外原位监测结合三维激光扫描技术分析了沟坡泻溜侵蚀特征及地形因子的变化特征。[结果](1)泻溜侵蚀量与温度和风速表现为极显著相关,相关系数分别为0.867,0.917。(2)地形因子数值总体呈增大趋势,坡上地表粗糙度和地表起伏度波动变化较为明显,坡中及坡下波动变化较缓,沟壑密度无明显规律特征。(3)泻溜侵蚀量与地表粗糙度和地表起伏度相关性显著且呈多项式回归关系,与沟壑密度相关性不显著。各地形因子间存在一定的相关性,地表粗糙度和地表起伏度呈显著正相关关系,相关系数为0.89。[结论]裸露砒砂岩区沟坡泻溜侵蚀量可以通过地表粗糙度和地表起伏度的数值波动来表征。
- Abstract:
- [Objective]The aims of this study are to examine the relationship between gully slope slumping erosion and topographic factors, and to provide a theoretical reference for the mechanism of gully slope slumping erosion and erosion disaster monitoring in bare sandstone area. [Methods]Based on in-situ monitoring and 3D laser scanning technology, the characteristics of slumping erosion and the variation of topographic factors were analyzed. [Results](1)The amount of slumping erosion was significantly correlated with temperature and wind speed, and the correlation coefficients were 0.867 and 0.917.(2)The topographic factor values showed an increasing trend in general, the surface roughness and surface undulations fluctuated more obviously on the slope, and the fluctuations changed slowly in the middle and lower slopes, and the gully density had no obvious regularity.(3)The amount of slumping erosion was significantly correlated with surface roughness and surface fluctuation, and the relationship was polynomial regression, there was no significant correlation with gully density. There was a certain correlation among the topographic factors, and the surface roughness and surface undulations showed a significant positive correlation, and the correlation coefficient was 0.89. [Conclusion]The erosion amount of gully slope in bare sandstone area can be characterized by the numerical fluctuation of surface roughness and surface fluctuation.
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备注/Memo
收稿日期:2023-08-28 修回日期:2023-10-11
资助项目:内蒙古自治区自然科学基金重大项目(2021ZD07); 内蒙古自治区自然科学基金项目(2021BS04009); 国家自然科学基金项目(41807097); 国家自然科学基金项目(4196070057); 内蒙古自治区科技计划项目(2020GG0075)
第一作者:赵文卓(1998—),女,内蒙古锡林浩特人,硕士研究生,主要从事水土保持与荒漠化防治研究。E-mail:841563463@qq.com
通信作者:秦富仓(1966—),男,内蒙古呼和浩特人,博士,教授,主要从事水土保持与荒漠化防治、林业教学与研究。E-mail:qinfc@126.com