Experimental study on the impact of water flow velocity on internal erosion of granite residual soil
Abstract The internal erosion effect causes fine particles in the soil to move through seepage, and the loss of these fine particles leads to changes in porosity, which in turn affects the soil’s hydraulic properties and mechanical performance, posing a threat to the safety of dam and levee engineer...
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Nature Portfolio
2025-08-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-06012-x |
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| author | Shaofeng Wan Hong Pan Guanyong Luo Sige Peng |
| author_facet | Shaofeng Wan Hong Pan Guanyong Luo Sige Peng |
| author_sort | Shaofeng Wan |
| collection | DOAJ |
| description | Abstract The internal erosion effect causes fine particles in the soil to move through seepage, and the loss of these fine particles leads to changes in porosity, which in turn affects the soil’s hydraulic properties and mechanical performance, posing a threat to the safety of dam and levee engineering. To understand the formation and development of internal erosion under reverse seepage, a simulation test device for internal erosion was designed, and experiments were conducted on three granite residual soil samples with identical soil properties under different water flow speeds (25 L/H, 50 L/H, and 100 L/H). By comparing and analyzing the wetting front, the amount of internal erosion, and the water content, the influence of water flow speed on reverse seepage internal erosion was studied. The results show that under reverse internal erosion, as the water flow speed increases, the internal erosion rate accelerates, as evidenced by the faster advancement of the wetting front and the increase in cumulative internal erosion. As internal erosion develops, the fine particle accumulation curve enters a stable phase. After the soil’s water content reaches its peak, it slightly decreases and then remains relatively stable. Fluctuations in the soil water content occur due to the formation of preferential internal erosion channels or the redeposition of fine particles. The soil particle movement, fine particle loss, and redeposition caused by internal erosion create an internal erosion channel that narrows from the inlet to the outlet. |
| format | Article |
| id | doaj-art-0c1047ddb95d4f64a76ddbc49605922f |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-0c1047ddb95d4f64a76ddbc49605922f2025-08-20T03:46:01ZengNature PortfolioScientific Reports2045-23222025-08-0115111310.1038/s41598-025-06012-xExperimental study on the impact of water flow velocity on internal erosion of granite residual soilShaofeng Wan0Hong Pan1Guanyong Luo2Sige Peng3School of Civil Engineering and Transportation, South China University of TechnologySchool of Civil Engineering and Transportation, South China University of TechnologySchool of Civil Engineering and Transportation, South China University of TechnologySchool of Civil and Transportation Engineering, Guangdong University of TechnologyAbstract The internal erosion effect causes fine particles in the soil to move through seepage, and the loss of these fine particles leads to changes in porosity, which in turn affects the soil’s hydraulic properties and mechanical performance, posing a threat to the safety of dam and levee engineering. To understand the formation and development of internal erosion under reverse seepage, a simulation test device for internal erosion was designed, and experiments were conducted on three granite residual soil samples with identical soil properties under different water flow speeds (25 L/H, 50 L/H, and 100 L/H). By comparing and analyzing the wetting front, the amount of internal erosion, and the water content, the influence of water flow speed on reverse seepage internal erosion was studied. The results show that under reverse internal erosion, as the water flow speed increases, the internal erosion rate accelerates, as evidenced by the faster advancement of the wetting front and the increase in cumulative internal erosion. As internal erosion develops, the fine particle accumulation curve enters a stable phase. After the soil’s water content reaches its peak, it slightly decreases and then remains relatively stable. Fluctuations in the soil water content occur due to the formation of preferential internal erosion channels or the redeposition of fine particles. The soil particle movement, fine particle loss, and redeposition caused by internal erosion create an internal erosion channel that narrows from the inlet to the outlet.https://doi.org/10.1038/s41598-025-06012-xGranite residual soilsInternal erosionErosion amountWetting frontErosion channel |
| spellingShingle | Shaofeng Wan Hong Pan Guanyong Luo Sige Peng Experimental study on the impact of water flow velocity on internal erosion of granite residual soil Scientific Reports Granite residual soils Internal erosion Erosion amount Wetting front Erosion channel |
| title | Experimental study on the impact of water flow velocity on internal erosion of granite residual soil |
| title_full | Experimental study on the impact of water flow velocity on internal erosion of granite residual soil |
| title_fullStr | Experimental study on the impact of water flow velocity on internal erosion of granite residual soil |
| title_full_unstemmed | Experimental study on the impact of water flow velocity on internal erosion of granite residual soil |
| title_short | Experimental study on the impact of water flow velocity on internal erosion of granite residual soil |
| title_sort | experimental study on the impact of water flow velocity on internal erosion of granite residual soil |
| topic | Granite residual soils Internal erosion Erosion amount Wetting front Erosion channel |
| url | https://doi.org/10.1038/s41598-025-06012-x |
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