Creep characteristics and process analyses of a thaw slump in the permafrost region of the Qinghai-Tibet Plateau, China
文献类型：期刊论文
| 作者 | Sun, Zhe1; Wang, Yibo1,2; Sun, Yan1; Niu, Fujun2; GuoyuLi2; Gao, Zeyong2 |
| 刊名 | GEOMORPHOLOGY
 |
| 出版日期 | 2017-09-15 |
| 卷号 | 293页码:1-10 |
| 关键词 | Permafrost Thaw slump Creep displacement Thermokarst |
| ISSN号 | 0169-555X |
| DOI | 10.1016/j.geomorph.2017.04.045 |
| 通讯作者 | Wang, Yibo(wangyib@lzu.edu.cn) |
| 英文摘要 | A thaw slump in the permafrost region of the Qinghai-Tibet Plateau was monitored to investigate typical characteristics of creep positions and processes in combination with soil property analyses. The results show that the thaw settlement exhibits a contraction effect in the horizontal direction because of uneven thaw settlement. Slope displacement of creep occurs only in the top 50 cm of the soil. The gravimetric water content, soil porosity, and soil temperature are higher near the thaw slump in thaw seasons compared with the undisturbed soil; however, the shear strength is lower. Melting ground ice releases thaw water that converges along the slope and forms an overland flow at the front part of the gentle slope area and a ponding depression at the slope bottom. The analyses of slope stability using the infinite slope model shows that the headwall of the slope is inevitably unstable and slides under saturated conditions, whereas the gentle slope area and slope bottom with slight creep displacement are relatively stable. The small retrogressive thaw slump is in an early development stage. With increasing degree of thaw settlement and rate of erosion, the headwall will become steeper and a thermokarst lake will form at the slope bottom. |
| 收录类别 | SCI |
| WOS关键词 | YUKON-TERRITORY ; THERMAL REGIME ; GELIFLUCTION ; CANADA ; FEATURES ; ORIGIN ; MAYO ; NWT |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000412257100001 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557687 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wang, Yibo |
| 作者单位 | 1.Lanzhou Univ, Coll Earth & Environm Sci, Lanzhou 73000, Gansu, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Zhe,Wang, Yibo,Sun, Yan,et al. Creep characteristics and process analyses of a thaw slump in the permafrost region of the Qinghai-Tibet Plateau, China[J]. GEOMORPHOLOGY,2017,293:1-10. |
| APA | Sun, Zhe,Wang, Yibo,Sun, Yan,Niu, Fujun,GuoyuLi,&Gao, Zeyong.(2017).Creep characteristics and process analyses of a thaw slump in the permafrost region of the Qinghai-Tibet Plateau, China.GEOMORPHOLOGY,293,1-10. |
| MLA | Sun, Zhe,et al."Creep characteristics and process analyses of a thaw slump in the permafrost region of the Qinghai-Tibet Plateau, China".GEOMORPHOLOGY 293(2017):1-10. |
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来源：寒区旱区环境与工程研究所
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