Analysis of slope erosion characteristics and physical meaning interpretation for two typical loess
BAI Yu1, HE Jijun1, SUN Liying2,3, TIAN Lei4, CAI Qiangguo2,3, WANG Mingwei1
1. Capital Normal University, State Key Laboratory of Urban Environmental Processes and Numerical Simulation, Beijing Laboratory of Water Resources Security, 100048, Beijing, China; 2. Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, 100101, Beijing, China; 3. College of Resources and Environment, University of Chinese Academy of Sciences, 100190, Beijing, China; 4. Beijing Water Resources and Hydropower School, 100024, Beijing, China
Abstract：[Background] Soil physical property is an important index to reflect soil erosion resistance, especially when soil particle composition is different, its sensitivity to rainfall and runoff is significantly different. At the same time, in the current research on soil erosion mechanism, more attention is paid to the representational relationship between various elements, but not enough attention is paid to the interpretation of their physical significance. Thus, to study the effect of soil properties on erosion characteristics and the physical significance of erosion rules can provide important theoretical support for the deep understanding of soil erosion mechanism and the optimization of evaluation model. [Methods] This study applied indoor simulated rainfall experiment to analyzed the erosion characteristics of Ansai soil (soil A)and Suide soil (soil B) in loess hilly and gully region under the conditions of 90 mm / h rainfall intensity and four slopes (5°, 7.5°, 10° and 15°), and explained the erosion mechanism based on the mathematical relationship and physical significance. [Results] 1) Compared with soil A, soil B has fast yield and high runoff, and is more prone to rill development and more serious erosion. 2) In general, the amount of erosion at the initial stage of runoff generation, sheet erosion stage and rill erosion stage increase with the slope. The sediment content of soil B in the sheet erosion stage is 1.09 4.47 times of that of soil A. The rill erosion stage of the former is 2.01 times that of the latter. The erosion amount of soil B in rill erosion stage is more than 98 % of the total erosion amount, and the average sediment content of soil B is 7.09 32.39 times of that in sheet erosion stage, while that of soil A is 96 % and 10.49 times, respectively. 3) The relationship between sediment yield and sediment content of the two soils can be expressed by y = ax + b. After optimization, the R2 of the linear relationship can reach 0.98 or above. Based on the analysis of mathematical relationship and physical significance, slope a can be used to express the erosion capacity of runoff, and intercept b can be used to characterize the type and abundance of removable substances. Soil particle composition has an important effect on soil erosion. Soil with high clay and silt content has lower sediment concentration and lower soil erosion intensity. [Conclusions] This study has important theoretical and practical significance both for deeply understanding the role of soil texture in slope erosion and for providing theoretical support for ecological protection.
白玉, 和继军, 孙莉英, 田磊, 蔡强国, 王铭微. 2种典型黄土坡面侵蚀特征分析及物理意义解释[J]. 中国水土保持科学, 2024, 22(3): 36-45.
BAI Yu, HE Jijun, SUN Liying, TIAN Lei, CAI Qiangguo, WANG Mingwei. Analysis of slope erosion characteristics and physical meaning interpretation for two typical loess. SSWC, 2024, 22(3): 36-45.
傅伯杰.黄土高原土地利用变化的生态环境效应[J].科学通报,2022,67(32):3769. FU Bojie. Ecological and environmental effects of landuse changes in the Loess Plateau of China[J]. Chinese Science Bulletin,2022,67(32):3769.
[2]
张科利,蔡永明,刘宝元,等.黄土高原地区土壤可蚀性及其应用研究[J].生态学报,2001,21(10):1687. ZHANG Keli,CAI Yongming,LIU Baoyuan,et al. Evaluation of soil erodibility on the Loess Plateau[J]. Acta Ecologica Sinica,2001,21(10):1687.
[3]
BONILLA C A,JOHNSON O I. Soil erodibility mapping and its correlation with soil properties in central Chile[J]. Geoderma,2012:189.
[4]
朱成刚,李卫红,李大龙,等.伊犁河谷土壤理化性质及可蚀性特征分析[J].资源科学, 2016, 38(7):1212. ZHU Chenggang, LI Weihong, LI Dalong, et al. Feature analysis of soil physicochemical properties and erodibility of the Yili Valley[J]. Resources Science,2016,38(7):1212.
[5]
WISCHMEIER W H,JOHNSON C B,CROSS B V. A soil erodibility nomograph for farmland and construction sites[J]. Journal of Soil and Water Conservation,1971,26(5):189.
[6]
陈俊杰,孙莉英,蔡崇法,等.不同土壤坡面细沟侵蚀差异与其影响因素[J].土壤学报,2013,50(2):281. CHEN Junjie,SUN Liying,CAI Chongfa,et al. Rill erosion on different soil slopes and their affecting factors[J]. Acta Pedologica Sinica,2013,50(2):281.
[7]
郑粉莉.黄土区坡耕地细沟间侵蚀和细沟侵蚀的研究[J].土壤学报,1998,35(1):95. ZHENG Fenli. Study on interrill erosion and rill erosion on slope farmland of loess area[J]. Acta Pedologica Sinica,1998,35(1):95.
[8]
蔡强国,朱远达,王石英.几种土壤的细沟侵蚀过程及其影响因素[J].水科学进展,2004,15(1):12. CAI Qiangguo, ZHU Yuanda, WANG Shiying. Research on processes and factors of rill erosion[J]. Advances In Water Sciences,2004,15(1):12.
[9]
田积莹,黄义端,雍绍萍.黄土地区土壤物理性质及与黄土成因的关系[J].水土保持研究,1987(1):1. TIAN Jiying,HUANG Yiduan,YONG Shaoping. The soil physical with relation to the loess genesis in the loess region[J]. Research of Soil and Water Conservation,1987(1):1.
[10]
吴冰,朱元骏,邵明安.含砾石土壤坡面流速及产流产沙过程研究[J].中国水土保持科学,2011,9(1):99. WU Bing,ZHU Yuanjun,SHAO Ming忆an. Flow velocity and processes of runoff and sediment generation on soils containing gravels[J]. Science of Soil and Water Conservation,2011,9(1):99.
[11]
和继军,王硕,蔡强国,等.黄土缓坡片蚀过程及其水力参数适宜性试验研究[J].水科学进展, 2021, 32(1):97. HE Jijun,WANG Shuo,CAI Qiangguo,et al. Experimental study on sheet erosion process of loess and its suitability of hydraulic parameters on gentle slopes[J]. Advances in Water Science,2021,32(1):97.
[12]
HE Jijun, LI Xueqing, JIA Lijuan, et al. Experimental study of rill evolution processes and relationships between runoff and erosion on clay loam and loess[J]. Soil Science Society of America Journal,2014,78(5):1716.
[13]
权鑫,史红伟,蔡强国,等.室内模拟降雨情形下黄土坡面沉降程度的试验研究[J].陕西师范大学学报(自然科学版),2021,49(2):98. QUAN Xin,SHI Hongwei,CAI Qiangguo, et al. Experimental study on the settlement of loess slope under indoor simulated rainfall[J]. Journal of Shaanxi Normal University (Natural Science Edition),2021,49(2):98.
[14]
刘希林,卓瑞娜.崩岗崩积体坡面初始产流时间影响因素及其临界阈值[J].生态环境学报,2023,32(1):36. LIU Xilin,ZHUO Ruina. Influential factors and their critical thresholds of initial runoff production time on the benggang colluvial slopes[J]. Ecology and Environmental Sciences,2023,32(1):36.
[15]
吴发启,赵西宁,佘雕.坡耕地土壤水分入渗影响因素分析[J].水土保持通报,2003,23(1):16. WU Faqi,ZHAO Xining,SHE Diao. Analysis on affecting factors of soil infiltration in slope farmland[J]. Bulletin of Soil and Water Conservation,2003,32(1):16.
[16]
卫喜国,严昌荣,魏永霞,等.坡度和降雨强度对坡耕地入渗的影响[J].灌溉排水学报,2009,28(4):114. WEI Xiguo,YAN Changrong,WEI Yongxia,et al. Influence of slope gradient and rainfall intensity on infiltration in sloping farm land[J]. Journal of Irrigation and Drainage,2009,28(4):114.
[17]
帕力夏提·格明,王龙,徐学选,等.林草植被恢复类型对黄土团聚体稳定性和入渗特性的影响[J].水土保持通报,2023,43(1):24. PALIXIATI Geming, WANG Long, XU Xuexuan, et al. Effects of forest and grass restoration types on aggregate stability and infiltration characteristics of loess[J]. Bulletin of Soil and Water Conservation,2023,43(1):24.
[18]
陈泽勋,吴英杰,王文君,等.不同放牧条件下坡面初始产流时间和径流流速变化特征[J].水土保持研究, 2023,30(3):62. CHEN Zexun,WU Yingjie,WANG Wenjun,et al. Characteristics of initial yield time and velocity of runoff under different grazing conditions[J]. Research of Soil and Water Conservation,2023,30(3):62.
[19]
赵西宁,吴发启,王万忠.黄土高原沟壑区坡耕地土壤入渗规律研究[J].干旱区资源与环境,2004,18(4):109. ZHAO Xining,WU Faqi,WANG Wanzhong. Research on soil infiltration law of slope farmland in gully area of Loess Plateau[J]. Journal of Arid Land Resources&Environment,2004,18(4):109.
[20]
QUAN Xin,HE Jijun,CAI Qiangguo,et al. Soil erosion and deposition characteristics of slope surfaces for two loess soils using indoor simulated rainfall experiment[J]. Soil&Tillage Research,2020:204.
[21]
刘俊娥,王占礼,高素娟,等.黄土坡面片流产流过程模拟研究[J].土壤学报,2013,50(2):268. LIU Jun忆e,WANG Zhanli,GAO Sujuan,et al. Simulatedrainfall experimental study on runoff of sheet flow on loss hillslops[J]. Acta Pedologica Sinica,2013,50(2):268.
[22]
和继军,黎雪晴,蔡强国,等.典型黄土坡面土壤侵蚀特征及径流流速空间变化试验研究[J].地理研究, 2022,41(5):1327. HE Jijun,LI Xueqing,CAI Qiangguo,et al. Experimental study on soil erosion characteristics and spatial variation of runoff velocity on typical loess slopes[J]. Geographic Research,2022,41(5):1327.
[23]
何子淼,余新晓,蔡强国,等.土壤质地对坡面细沟发育过程影响的研究进展[J].泥沙研究,2022,47(5):74. HE Zimiao,YU Xinxiao,CAI Qiangguo,et al. Research progress on the effect of soil texture on rill development[J]. Journal of Sediment Research,2022,47(5):74.
2024, Vol. 22 
