Telling a different story: The promote role of vegetation in the initiation of shallow landslides during rainfall on the Chinese Loess Plateau
Telling a different story: The promote role of vegetation in the initiation of shallow landslides during rainfall on the Chinese Loess Plateau
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讲述不同的故事：植被在中国黄土高原降雨期间引发浅层滑坡的促进作用
DOI：
10.1016/j.geomorph.2019.106879
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发表时间：
2020-02
期刊：
影响因子：
3.9
通讯作者：
Man Zhao
中科院分区：
文献类型：
--
作者：
Wenzhao Guo（郭文召）;Zhuoxin Chen;Wenlong Wang;Wenwang Gao;Mingming Guo;Hongliang Kang;Pengfei Li;Wenxin Wang;Man Zhao
植被在世界范围内被广泛应用于滑坡治理，但在黄土高原植被覆盖的坡面上，雨季植被诱发的浅层滑坡频繁发生。为了探索这一现象，我们在黄土高原南小河沟流域进行了现场调查和测量，探讨土壤性质和植被对浅层黄土滑坡的影响。植被覆盖斜坡上的黄土滑坡大多规模较小，深度在0.3 m至1.0 m之间，对应于降雨导致表土饱和。浅层滑坡多发生在草本植被覆盖区，占滑坡总数的69%。滑动面上层（根土复合体）和下层（黄土）的土壤性质存在显著差异。我们的研究表明，根在滑坡侵蚀中起着主导作用，植被对滑坡的最不利影响主要是通过根区增加浅层土壤中的土壤水分含量，从而产生优先的入渗流路。不同植被类型的滑坡侵蚀深度和滑坡侵蚀强度存在显著差异。滑坡侵蚀深度和滑坡侵蚀强度均随主根深度的增加而线性增加，表明植被根系深度决定了降雨过程中滑坡的侵蚀强度。因此，植被特别是草本植物在降雨期间促进滑坡发生的潜在影响应在未来得到更多的关注。
Vegetation is widely used for controlling landslides around the world; however, rainfall-induced shallow landslides occur frequently on vegetation-covered slopes on the Chinese Loess Plateau during the rainy season. To probe this phenomenon, we conducted on-site investigations and measurements in the Nanxiaohegou catchment on the Loess Plateau to explore the effects of soil properties and vegetation on shallow loess landslides. Most of the loess landslides on vegetation-covered slopes were small scale with depths ranging from 0.3 m to 1.0 m, corresponding to the topsoil being saturated due to rainfall. Majority of shallow landslides occurred on herbage-covered area, which made up 69% of total landslides. There are significant differences in soil properties between the upper layer (root-soil composite) and the lower layer (loess) of the sliding surface. Our study demonstrated that root plays a leading role in landslide erosion and that the most adverse effect of vegetation on landslides is mainly the increase in soil moisture content in the shallow soil through the root zone creating preferential infiltration flow paths. There are remarkable differences in landslide erosion depths and landslide erosion intensities among different vegetation types. The landslide erosion depth and landslide erosion intensity increased linearly with increasing main root depth, indicating that the vegetation root depth determines the landslide erosion intensity during rainfall. Therefore, the potential implications of vegetation especially the herbage to promote landslide occurrences during rainfall should be given more attention in the future.
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影响因子：
3.3
作者：
J. Nyssen;J. Poesen;M. Veyret-Picot;J. Moeyersons;M. Haile;J. Deckers;J. Dewit;J. Naudts;K. Teka;Gerard Govers
通讯作者：
J. Nyssen;J. Poesen;M. Veyret-Picot;J. Moeyersons;M. Haile;J. Deckers;J. Dewit;J. Naudts;K. Teka;Gerard Govers
影响因子：
3.9
作者：
Guo Wenzhao;Luo Li;Wang Wenlong;Liu Zhenyi;Chen Zhuoxin;Kang Hongliang;Yang Bo
通讯作者：
Yang Bo
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影响因子：
2.4
作者：
Song, Xiaoyu;Li, Huaiyou
通讯作者：
Li, Huaiyou
影响因子：
3.9
作者：
O. Korup;A. Densmore;F. Schlunegger
通讯作者：
O. Korup;A. Densmore;F. Schlunegger
影响因子：
6.1
作者：
Chih-Hsin Cheng;Sheng-Che Hsiao;Yu-Sheng Huang;Chih-Yu Hung;C. Pai;Chiou-Pin Chen;O. Menyailo
通讯作者：
Chih-Hsin Cheng;Sheng-Che Hsiao;Yu-Sheng Huang;Chih-Yu Hung;C. Pai;Chiou-Pin Chen;O. Menyailo