HE Weipeng,HU Xiasong,LIU Changyi,et al.Effects of Different Plants on Runoff and Sediment Yield and Shear Strength of Loess Slope[J].Research of Soil and Water Conservation,2023,30(04):18-26.[doi:10.13869/j.cnki.rswc.2023.04.046.]
不同植物对黄土边坡产流产沙与抗剪强度的影响
- Title:
- Effects of Different Plants on Runoff and Sediment Yield and Shear Strength of Loess Slope
- 文章编号:
- 1005-3409(2023)04-0018-09
- Keywords:
- loess region; cold and arid environment; plant slope; runoff and sediment yield; shear strength; root-soil composite system
- 分类号:
- S157.1
- 文献标志码:
- A
- 摘要:
- [目的]探讨不同草本植物对黄土边坡产流产沙与抗剪强度特征的影响,为进一步开展高寒干旱和半干旱地区,有效防治因降雨诱发水土流失、浅层滑坡等地质灾害,提供理论依据和实际指导。[方法]在西宁盆地长岭沟流域自建试验区,选取垂穗披碱草(Elymus nutans)、老芒麦(Elymus sibiricus)、细茎冰草(Agropyron trachycaulum)3种优势草本植物为试验供试种,开展原位人工模拟降雨试验与室内直剪试验,分析了模拟降雨条件下6种不同类型植物边坡坡面产流产沙及根—土复合体抗剪强度特征。[结果]在模拟降雨条件下,草本植物能显著抑制坡面产流产沙,阶梯形边坡相对直形边坡能显著降低坡面产流产沙,且随着草本生长期增加坡面产流产沙显著降低,生长期为2 a的种植垂穂披碱草阶梯形边坡坡面累积产沙量较垂穂披碱草直形边坡降幅为79.68%,生长期为1 a的种植垂穂披碱草阶梯形边坡平均产沙率较阶梯形未种植裸坡降低幅度最大为86.27%,表明种植垂穂披碱草阶梯形边坡有效抑制坡面的产流能力相对显著; 进一步研究表明,降雨使边坡土体平均含水率增大,导致边坡浅层土体黏聚力降低; 与直形边坡相比较,模拟降雨后阶梯形边坡黏聚力c值降低幅度较小,其中种植垂穂披碱草阶梯形边坡较降雨前降低幅度为19.25%,表明垂穂披碱草阶梯形边坡其增强边坡土体强度效果相对最显著。[结论]垂穗披碱草阶梯形边坡表现出相对更显著的抑制边坡水土流失和提高边坡浅层土体抗剪强度,起到增强边坡土体稳定性的作用。
- Abstract:
- [Objective] The impact of different herbaceous species on sediment yields and shear strength of loess slope was investigated in order to provide theoretical basis and practical guidance for the further development of effective prevention and control of geological disasters such as soil erosion and shallow landslides caused by rainfall in alpine arid and semi-arid areas. [Methods] The Changlinggou Catchment located in Xining Basin was selected as the testing area, three indigenous predominant herbs(Elymus nutans, Elymus sibiricus and Agropyron trachycaulum)were taken as the testing species and artificial rainfall was conducted to quantify the impact of slope types and herb types on the yield rate of sediment and runoff, and the rooted soils of the vegetated slopes were sampled to compare the impact of precipitation on the shear strength of slope soil. [Results] Under artificial rainfall, herbaceous plants significantly reduced in productions of runoff and sediments on the slope. Compared with straight slope, terraced slope significantly reduced runoff and sediment production on the slope. With the increase of herbaceous growth period, runoff and sediment productions on the slope decreased significantly. Among them, the cumulative sediment yield of the terraced slope of E. nutans with 2-years growing period decreased by 79.68% compared with the straight slope, and the average sediment yield of the terraced slope of E. nutans with 1-year decreased by 86.27% compared with the terraced bare slope, indicating their excellent capacities for refraining the yields of sediments and runoff in terraced slopes. Moreover, the mean moisture content in slope soil increased under rainfall situation, which led to a decrease of soil cohesion. Compared with the straight slope, cohesion of terraced slope exhibited a slight decrease, especially in E. nutans terraced slope, which decreased by 19.25%, indicating its excellence in increasing soil cohesion. [Conclusion] E. nutans terraced slope can effectively inhibit soil and water losses and enhance the shear strength of shallow soil, so as to improve the stability of the slope.
参考文献/References:
[1] 彭建兵,王启耀,门玉明,等.黄土高原滑坡灾害[M].北京:科学出版社,2019.
[2] Zhuang J Q, Peng J B, Wang G H, et al. Distribution and characteristics of landslide in Loess Plateau: A case study in Shaanxi Province[J]. Engineering Geology, 2018,236:89-96.
[3] Feng J, Wei W, Pan D I. Effects of rainfall and terracing-vegetation combinations on water erosion in a loess hilly area, China[J]. Journal of Environmental Management, 2022,261:110247.
[4] 饶鸿,王金淑,赵志明,等.基于有限元软件自定义本构模型的膨胀土边坡降雨入渗分析[J].水文地质工程地质,2021,48(1):154-162.
[5] Tao H, Zhang M M, Gong L, et al. The mechanism of slope instability due to rainfall-induced structural decay of earthquake-damaged loess[J]. Earthquake Research Advances, 2022,2(3):100137.
[6] 李国荣,陈文婷,朱海丽,等.青藏高原东北部黄土地区降雨入渗对土质边坡稳定性的影响研究[J].水文地质工程地质,2015,42(2):105-111.
[7] 栗岳洲,付江涛,胡夏嵩,等.土体粒径对盐生植物根—土复合体抗剪强度影响的试验研究[J].岩石力学与工程学报,2016,35(2):403-412.
[8] 李华坦,赵玉娇,李国荣,等.寒旱环境黄土区植物护坡原位模拟降雨试验研究[J].水土保持研究,2014,21(6):304-311.
[9] 谢申琦,高丽倩,赵允格,等.模拟降雨条件下生物结皮坡面产流产沙对雨强的响应[J].应用生态学报,2019,30(2):391-397.
[10] Xia L, Song X Y, Fu N, et al. Effects of forest litter cover on hydrological response of hillslopes in the Loess Plateau of China[J]. Catena, 2019,181:104076.
[11] 李智勇,张梦杰,陈明玉,等.苜蓿对坡面产流产沙及土壤水分的影响[J].水土保持研究,2021,28(5):54-60.
[12] 侯宁,王勇,赵虎,等.耕作侵蚀对不同坡度下紫色土侵蚀产沙的影响[J].山地学报,2021,39(4):495-505.
[13] Sun P, Wang H J, Wang G, et al. Field model experiments and numerical analysis of rainfall-induced shallow loess landslides[J]. Engineering Geology, 2021,295:106411.
[14] Huang M Y, Sun S J, Feng K J, et al. Effects of Neyraudia reynaudiana roots on the soil shear strength of collapsing wall in Benggang, southeast China[J]. Catena, 2022,210:105883.
[15] Xu H, Wang X Y, Liu C N, et al. A 3D root system morphological and mechanical model based on L-Systems and its application to estimate the shear strength of root-soil composites[J]. Soil & Tillage Research, 2021,212:105074.
[16] 唐凛,杨晓松,查旭东,等.基于含水率的重塑低液限黏土抗剪强度关系模型试验[J].长沙理工大学学报:自然科学版,2021,18(2):26-32.
[17] 林斌,田竹华,陈雨漫.含水率对重塑红黏土反复抗剪强度影响试验研究[J].黄金科学技术,2021,29(5):680-689.
[18] 李佳,汪霞,贾海霞,等.浅层滑坡多发区典型灌木根系对边坡土体抗剪强度的影响[J].生态学报,2019,39(14):5117-5126.
[19] 刘亚斌,胡夏嵩,余冬梅,等.西宁盆地黄土区草本和灌木组合根系分布特征及其增强土体抗剪强度效应[J].工程地质学报,2020,28(3):471-481.
[20] 何永晴,李凤霞.近47年环青海湖地区气候变化特征分析[J].安徽农业科学,2011,39(16):9902-9904.
[21] 石明章,索生睿,祁栋林.1961—2015年西宁市降水变化特征分析[J].现代农业科技,2018(2):198-200.
[22] 许桐,刘昌义,胡夏嵩,等.西宁盆地黄土区荷载条件下植被护坡力学效应[J].农业工程学报,2021,37(2):142-151.
[23] 孙红丽,王贵玲,蔺文静.西宁盆地地下热水的TDS分布特征及富集机理[J].地质科技通报,2022,41(1):278-287,299.
[24] 胡夏嵩,毛小青,朱海丽,等.青藏高原植被护坡[M].北京:地质出版社,2011.
[25] 李姜瑶,缪晓星,王延秀,等.西宁盆地黄土区不同草本植物和坡形条件下坡面产流产沙特征[J].盐湖研究,2022,30(1):33-45.
[26] 孙若修,申明爽,胡亚伟,等.模拟降雨下坡面草带分布对产流产沙过程的影响[J].水土保持学报,2022,36(4):22-29.
[27] 许桐,刘昌义,胡夏嵩,等.柴达木盆地4种盐生植物根系力学特性及根—土复合体抗剪强度研究[J].水土保持研究,2021,28(3):101-110.
[28] 窦增宁,胡夏嵩,刘昌义,等.模拟降雨条件下黄土区边坡植物护坡效应[J].人民黄河,2018,40(3):83-87.
[29] 邵奕铭,高光耀,刘见波,等.自然降雨下黄土丘陵区草灌植物垂直覆盖结构的减流减沙效应[J].生态学报,2022,42(1):322-331.
[30] 申紫雁,刘昌义,胡夏嵩,等.黄河源区高寒草地不同深度土壤理化性质与抗剪强度关系研究[J].干旱区研究,2021,38(2):392-401.
[31] 李同录,习羽,侯晓坤.水致黄土深层滑坡灾变机理[J].工程地质学报,2018,26(5):1113-1120.
[32] 赵吉坤,陈佳虹.降雨条件下土体坡度及含水率对边坡稳定性影响的试验研究[J].山东大学学报:工学版:2013,43(2):76-83.
[33] 李华坦,李国荣,赵玉娇,等.模拟自然降雨条件下植物根系增强边坡土体抗剪强度特征[J].农业工程学报,2016,32(4):142-149.
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备注/Memo
收稿日期:2022-07-15 修回日期:2022-09-21
资助项目:青海省自然科学基金(2020-ZJ-906); 第二次青藏高原综合科学考察研究项目(2019QZKK0905)
第一作者:何伟鹏(1994—),女,甘肃会宁人,硕士研究生,主要从事地质工程与环境地质等方面的研究工作。E-mail:1036762123@qq.com
通信作者:刘昌义(1991—),男,四川宜宾人,实验师,主要从事地质工程与环境地质等方面教学和科研工作。E-mail:1358128151@qq.com