Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions
Natural rainfall affects the stability of soil aggregates by the kinetic energy of the rain changing the morphological characteristics of slope micro-topographic factors. Although the relationship between the stability of soil aggregates and micro-topography is not very significant at the slope scal...
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| Format: | Article |
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MDPI AG
2024-02-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/16/5/648 |
| _version_ | 1797263782601293824 |
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| author | Shangxuan Zhang Long Li Zhizhuo Zhu Peng Zhang |
| author_facet | Shangxuan Zhang Long Li Zhizhuo Zhu Peng Zhang |
| author_sort | Shangxuan Zhang |
| collection | DOAJ |
| description | Natural rainfall affects the stability of soil aggregates by the kinetic energy of the rain changing the morphological characteristics of slope micro-topographic factors. Although the relationship between the stability of soil aggregates and micro-topography is not very significant at the slope scale, there are also rules to be found. This study aims to explore the relationship between slope micro-topography and aggregate stability, and to observe the spatial distribution of aggregate stability after water erosion. In this study, a digital elevation model of slope micro-topography was established by using a three-dimensional laser scanner to observe the slope erosion changes after rainfall events and clarify the spatial changes of soil aggregate stability and its relationship with slope micro-topography by combining geostatistics and generalized additive model (GAM). The results showed that the area of serious water erosion in the lower part of the slope accounted for 38.67% of the slope, and the micro-topography index of the slope changed obviously after rainfall, with the slope increasing by 3.1%, the surface roughness increasing by 5.34%, the surface cutting degree increasing by 26.67%, and the plane curvature decreasing by 61.7%. In addition, the GAM model was used to fit the multivariate variables. The results revealed that the slope and surface roughness were the key factors affecting the stability of water-stable aggregate. The slope and surface roughness were negatively correlated with the stability of water-stable aggregates. |
| first_indexed | 2024-04-25T00:18:29Z |
| format | Article |
| id | doaj.art-1866b8ca935f49b7a5cd0f4e7be34730 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-04-25T00:18:29Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-1866b8ca935f49b7a5cd0f4e7be347302024-03-12T16:57:33ZengMDPI AGWater2073-44412024-02-0116564810.3390/w16050648Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall ConditionsShangxuan Zhang0Long Li1Zhizhuo Zhu2Peng Zhang3College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, ChinaCollege of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, ChinaNatural rainfall affects the stability of soil aggregates by the kinetic energy of the rain changing the morphological characteristics of slope micro-topographic factors. Although the relationship between the stability of soil aggregates and micro-topography is not very significant at the slope scale, there are also rules to be found. This study aims to explore the relationship between slope micro-topography and aggregate stability, and to observe the spatial distribution of aggregate stability after water erosion. In this study, a digital elevation model of slope micro-topography was established by using a three-dimensional laser scanner to observe the slope erosion changes after rainfall events and clarify the spatial changes of soil aggregate stability and its relationship with slope micro-topography by combining geostatistics and generalized additive model (GAM). The results showed that the area of serious water erosion in the lower part of the slope accounted for 38.67% of the slope, and the micro-topography index of the slope changed obviously after rainfall, with the slope increasing by 3.1%, the surface roughness increasing by 5.34%, the surface cutting degree increasing by 26.67%, and the plane curvature decreasing by 61.7%. In addition, the GAM model was used to fit the multivariate variables. The results revealed that the slope and surface roughness were the key factors affecting the stability of water-stable aggregate. The slope and surface roughness were negatively correlated with the stability of water-stable aggregates.https://www.mdpi.com/2073-4441/16/5/648natural rainfallmicro-topographystability of soil aggregatespatial heterogeneity |
| spellingShingle | Shangxuan Zhang Long Li Zhizhuo Zhu Peng Zhang Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions Water natural rainfall micro-topography stability of soil aggregate spatial heterogeneity |
| title | Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions |
| title_full | Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions |
| title_fullStr | Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions |
| title_full_unstemmed | Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions |
| title_short | Spatial Distribution and Relationship between Slope Micro-Topography Changes and Soil Aggregate Stability under Rainfall Conditions |
| title_sort | spatial distribution and relationship between slope micro topography changes and soil aggregate stability under rainfall conditions |
| topic | natural rainfall micro-topography stability of soil aggregate spatial heterogeneity |
| url | https://www.mdpi.com/2073-4441/16/5/648 |
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