Simulation experiments on influences of bedrock exposed rate and soil thickness on soil erosion

DENG Da-peng; LIU Qi; LU Yao-ru; REN Biao

doi:10.11779/CJGE2022S2035

Volume 44 Issue S2

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Chinese Journal of Geotechnical Engineering > 2022 > 44(S2): 160-163. > DOI: 10.11779/CJGE2022S2035

DENG Da-peng, LIU Qi, LU Yao-ru, REN Biao. Simulation experiments on influences of bedrock exposed rate and soil thickness on soil erosion[J]. Chinese Journal of Geotechnical Engineering, 2022, 44(S2): 160-163. DOI: 10.11779/CJGE2022S2035

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Simulation experiments on influences of bedrock exposed rate and soil thickness on soil erosion

DENG Da-peng^{1, 2,},
LIU Qi^{1, 2, ,},
LU Yao-ru^{1, 2},
REN Biao^{1, 2}

1.
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
2.
Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China

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Received Date: December 05, 2022
Available Online: March 26, 2023

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Abstract

Abstract

In order to study the influences of bedrock exposure rate and soil thickness on water and soil loss in karst areas, the simulation experiments are carried out to study the hydrological process and its driving water and soil movement process by the self-made test equipment. Considering the phenomenon of soil surface loss/underground leakage under karst hydrogeological structure, the results show that the characteristics of surface and underground soil loss rate are that the runoff rate rises rapidly to the peak value and then gradually decreases. There is a significant positive correlation between the soil underground leakage rate and the soil thickness, and a significant negative correlation between the soil surface loss rate and the bedrock exposure rate. With the increase of the bedrock exposure rate, the fluctuation of soil surface loss rate with time is more obvious. The correlations between the sediment yield and the bedrock exposure rate/soil thickness are fine, and the linear correlation coefficients R² are all above 0.9. The surface sediment yield decreases with the increase of the bedrock exposure rate and soil thickness, and the underground sediment yield decreases with the increase of the bedrock exposure rate but increases with the increase of the soil thickness.
- karst rocky desertification,
- surface loss,
- underground leakage,
- bedrock exposed rate,
- soil thickness

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References

[1]	LIU Q, DENG D P, YAO B J, et al. Analysis of the Karst springs' supply sources in rocky desertification area of Guanling-Huajiang, Guizhou, China[J]. Carbonates and Evaporites, 2020, 35(3): 1–11.
[2]	卢耀如, 张凤娥, 刘长礼, 等. 中国典型地区岩溶水资源及其生态水文特性[J]. 地球学报, 2006, 27(5): 393–402. doi: 10.3321/j.issn:1006-3021.2006.05.002 LU Yao-ru, ZHANG Feng-e, LIU Chang-li, et al. Karst water resources in typical area of China and their eco-hydrological characteristics[J]. Acta Geoscientica Sinica, 2006, 27(5): 393–402. (in Chinese) doi: 10.3321/j.issn:1006-3021.2006.05.002
[3]	ZHANG J Y, DAI M H, WANG L C, et al. The challenge and future of rocky desertification control in Karst areas in Southwest China[J]. Solid Earth, 2016, 7(1): 83–91. doi: 10.5194/se-7-83-2016
[4]	王明刚. 粤北石漠化土地水土流失过程的人工降雨模拟试验研究[D]. 广州: 华南师范大学, 2007. WANG Ming-gang. Experimental Study on Artificial Rainfall Simulation of Soil and Water Loss in Rock Desertification Land in Northern Guangdong[D]. Guangzhou: South China Normal University, 2007. (in Chinese)
[5]	刘正堂, 戴全厚, 倪九派, 等. 喀斯特地区裸坡面土壤侵蚀的人工模拟降雨试验研究[J]. 水土保持学报, 2013, 27(5): 12–16. https://www.cnki.com.cn/Article/CJFDTOTAL-TRQS201305003.htm LIU Zheng-tang, DAI Quan-hou, NI Jiu-pai, et al. Bare slope soil erosion experimental research under the condition of artificial rainfall precipitation in Karst area[J]. Journal of Soil and Water Conservation, 2013, 27(5): 12–16. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TRQS201305003.htm
[6]	高翔, 蔡雄飞, 王济, 等. 喀斯特地貌不同坡度下土壤侵蚀经验模型研究[J]. 贵州: 贵州农业科学, 2013(7): 111–115. doi: 10.3969/j.issn.1001-3601.2013.07.031 GAO Xiang, XAI Xiong-fei, WANG Ji, et al. Study on soil erosion model under different slope in Southeast Karst mountain area[J]. Guizhou Agricultural Sciences, 2013(7): 111–115. (in Chinese) doi: 10.3969/j.issn.1001-3601.2013.07.031
[7]	CAI X F, JI WAN Y L, et al. Laboratorial simulation on soil erosion under different vegetation coverage in Southwest Karst Area, [C]// 2011 International Symposium on Water Resource and Envicronmental Protection. May 20-22, 2011, Xi'an. China. IEEE, 2010: 2010–2014.
[8]	DAI Q H, PENG X, YANG Z, et al. Runoff and erosion processes on bare slopes in the Karst Rocky Desertification Area[J]. CATENA, 2017, 152: 218–226. doi: 10.1016/j.catena.2017.01.013
[9]	李玲, 周运超, 尹先平. 不同降雨模式下石灰土坡地地表侵蚀特征[J]. 中国水土保持科学, 2013, 11(6): 1–6. https://www.cnki.com.cn/Article/CJFDTOTAL-STBC201306001.htm
[10]	XIONG X F, LI J H, ZHANG T, et al. Simulation of coupled transport of soil moisture and heat in a typical Karst rocky desertification area, Yunnan Province, Southwest China[J]. Environmental Science and Pollution Research, 2021, 28: 4716–4730. doi: 10.1007/s11356-020-10784-2
[11]	李小龙, 王雪冬. 山东废弃石灰岩矿山地质环境特征与治理恢复探索[J]. 地质与资源, 2018, 27(1): 89–92. https://www.cnki.com.cn/Article/CJFDTOTAL-GJSD201801012.htm
[12]	MA T S, DENG X, CHEN L, et al. The soil properties and their effects on plant diversity in different degrees of rocky desertification[J]. Science of the Total Environment, 2020, 736: 139667.
[13]	刘琦, 王涵, 廖启迪, 等. 一种表层岩溶裂隙带土壤地表流失和地下漏失模拟装置: CN112611850A[P]. 2021-04-06.
[14]	肖军华, 刘建坤, 彭丽云, 等. 黄河冲积粉土的密实度及含水率对力学性质影响[J]. 岩土力学, 2008, 29(2): 409–414. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX200802038.htm

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