收藏本站
收藏 | 投稿 | 手机打开
二维码
手机客户端打开本文

The landslide problem

G.Shanmugam  
【摘要】:The synonymous use of the general term "landslide", with a built-in reference to a sliding motion, for all varieties of mass-transport deposits(MTD), which include slides, slumps, debrites, topples, creeps, debris avalanches etc. in subaerial, sublacustrine, submarine, and extraterrestrial environments has created a multitude of conceptual and nomenclatural problems. In addition, concepts of triggers and long-runout mechanisms of mass movements are loosely applied without rigor. These problems have enormous implications for studies in process sedimentology, sequence stratigraphy, palaeogeography, petroleum geology, and engineering geology. Therefore, the objective of this critical review is to identify key problems and to provide conceptual clarity and possible solutions. Specific issues are the following:(1) According to "limit equilibrium analyses" in soil mechanics, sediment failure with a sliding motion is initiated over a shear surface when the factor of safety for slope stability(F) is less than 1. However, the term landslide is not meaningful for debris flows with a flowing motion.(2) Sliding motion can be measured in oriented core and outcrop, but such measurement is not practical on seismic profiles or radar images.(3) Although 79 MTD types exist in the geological and engineering literature, only slides, slumps, and debrites are viable depositional facies for interpreting ancient stratigraphic records.(4) The use of the term landslide for highvelocity debris avalanches is inappropriate because velocities of mass-transport processes cannot be determined in the rock record.(5) Of the 21 potential triggering mechanisms of sediment failures, frequent short-term events that last for only a few minutes to several hours or days(e.g., earthquakes, meteorite impacts, tsunamis, tropical cyclones, etc.) are more relevant in controlling deposition of deep-water sands than sporadic long-term events that last for thousands to millions of years(e.g., sea-level lowstands).(6) The comparison of H/L(fall height/runout distance) ratios of MTD in subaerial environments with H/L ratios of MTD in submarine and extraterrestrial environments is incongruous because of differences in data sources(e.g., outcrop vs. seismic or radar images).(7) Slides represent the pre-transport disposition of strata and their reservoir quality(i.e., porosity and permeability) of the provenance region, whereas debrites reflect post-transport depositional texture and reservoir quality. However, both sandy slides and sandy debrites could generate blocky wireline(gamma-ray) log motifs. Therefore, reservoir characterization of deep-water strata must be based on direct examination of the rocks and related process-specific facies interpretations, not on wireline logs or on seismic profiles and related process-vague facies interpretations. A solution to these problems is to apply the term "landslide" solely to cases in which a sliding motion can be empirically determined. Otherwise, a general term MTD is appropriate. This decree is not just a quibble over semantics; it is a matter of portraying the physics of mass movements accurately. A precise interpretation of a depositional facies(e.g., sandy slide vs. sandy debrite) is vital notonly for maintaining conceptual clarity but also for characterizing petroleum reservoirs.

知网文化
【相似文献】
中国期刊全文数据库 前20条
1 ;Rainfall-induced landslide stability analysis in response to transient pore pressure——A case study of natural terrain landslide in Hong Kong[J];Science in China(Series E:Technological Sciences);2003年S1期
2 ;Synergetic-bifurcated prediction model of slope occurrence and its application[J];Science in China(Series E:Technological Sciences);2003年S1期
3 ;HUMAN-INDUCED LANDSLIDES IN CHINA:MECHANISM STUDY AND ITS IMPLICATIONS ON SLOPE MANAGEMENT[J];岩石力学与工程学报;2004年16期
4 ;Mechanism analysis of landslide of a layered slope induced by drawdown of water level[J];Science in China(Series E:Technological Sciences);2005年S1期
5 ;A new method for spatio-temporal prediction of rainfall-induced landslide[J];Science in China(Series D:Earth Sciences);2006年04期
6 ;Landslides and Slope Aspect in the Three Gorges Reservoir Area Based on GIS and Information Value Model[J];Wuhan University Journal of Natural Sciences;2006年04期
7 ;Assessment and Risk Zonation of Landslides in Panxi Area Based on 3S Technology[J];Wuhan University Journal of Natural Sciences;2006年04期
8 ;GIS-based logistic regression method for landslide susceptibility mapping in regional scale[J];Journal of Zhejiang University Science A(Science in Engineering);2006年12期
9 ;Spatial prediction of landslide for Badong County in the Three Gorges reservoir district[J];Global Geology;2006年02期
10 ;Regional landslide hazard assessment based on Distance Evaluation Model[J];Global Geology;2008年04期
11 ;Landslide Dam Forming Hazard Analysis Based on Geological and Induced Factors[J];地学前缘;2009年S1期
12 Catherine PENNINGTON;Claire FOSTER;Jonathan CHAMBERS;Gareth JENKINS;;Landslide Research at the British Geological Survey:Capture,Storage and Interpretation on a National and Site-Specific Scale[J];Acta Geologica Sinica(English Edition);2009年05期
13 KARNAWATI Dwikorita;FATHANI Teuku F;IGNATIUS Sudarno;ANDAYANI Budi;LEGONO Djoko;BURTON Paul W;;Landslide Hazard and Community-based Risk Reduction Effort in Karanganyar and the Surrounding Area,Central Java,Indonesia[J];Journal of Mountain Science;2011年02期
14 ;Building Vulnerability Evaluation in Landslide Deformation Phase[J];Journal of Mountain Science;2011年02期
15 BALZ Timo;;Landslide monitoring with high-resolution SAR data in the Three Gorges region[J];Science China(Earth Sciences);2012年04期
16 刘鲁文;项伟;林兆祥;刘林美;吴金泉;;Research on the Distribution of Major Metal Elements in the Typical Landslide Soil of the Three Gorges Reservoir Area[J];Journal of Earth Science;2012年02期
17 钟成;李卉;项伟;苏爱军;黄先锋;;Comprehensive Study of Landslides through the Integration of Multi Remote Sensing Techniques: Framework and Latest Advances[J];Journal of Earth Science;2012年02期
18 Ming-Wey HUANG;Chien-Yuan CHEN;Tzu-Hsiu WU;Sheu-Yien LIU;Ching-Yun KAO;;GIS-based Evaluation on the Fault Motion-Induced Coseismic Landslides[J];Journal of Mountain Science;2012年05期
19 ;Physically-based approach to analyze rainfall-triggered landslide using hydraulic gradient as slide direction[J];Journal of Zhejiang University-Science A(Applied Physics & Engineering);2012年12期
20 WANG Hong-hui;TUO Xian-guo;ZHANG Gui-yu;PENG Feng-ling;;Panzhihua Airport Landslide (Oct. 3rd 2009) and an Emergency Monitoring and Warning System Based on the Internet of Things[J];Journal of Mountain Science;2013年05期
中国重要会议论文全文数据库 前10条
1 S.W.Qi;F.Wu;Y.Song;Z.Q.Li;;Reactivation of an overlooked landslide in site of power plant of Shawan hydropower station,Sichuan,China[A];中国科学院地质与地球物理研究所2012年度(第12届)学术论文汇编——工程地质与水资源研究室[C];2013年
2 ;A super-large landslide in Tibet in 2000:background,occurrence,disaster,and origin[A];中国科学院地质与地球物理研究所二○○三学术论文汇编·第三卷(地球环境·工程地质与灾害)[C];2003年
3 ;Baota landslide in the Three Gorges area and its OSL dating[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
4 Souting Lee;;On evaluating the stability of the Baiyian ancient landslide in the Three Gorges Reservoir area,Yangtze River:a geological history analysis[A];中国科学院地质与地球物理研究所2008学术论文汇编[C];2009年
5 Katsumi Hattori;Hiroshi Otsubo;Tomohiro Yamazaki;Peng Han;Chie Yoshino;Tomomi Terajima;Akira Suemine;Qinghua Huang;;Development of Early Warning System of Rainfall-Induced Landslides using Passive Electromagnetic Approach[A];中国地球物理2013——第一专题论文集[C];2013年
6 Hou Xiaoqiang;Zhang Shimin;;Finite-Element Numerical Analysis and Developmental Characteristics of the Yushu Xihang Hydropower Station Landslide[A];第五届全国计算机数学学术会议论文集[C];2013年
7 Xu Wei;Hu Ruilin;Li Tiefeng;;Formation mechanism and stability analysis on the Hekou sugar-refinery landslide in Xinping County,Yunnan Province[A];中国科学院地质与地球物理研究所2013年度(第13届)学术论文汇编——工程地质与水资源研究室[C];2014年
8 ;A nonlinear dynamical model of landslide evolution[A];中国科学院地质与地球物理研究所2002学术论文摘要汇编[C];2002年
9 Chu Van Ngoi;Ta Trong Thang;Luong Thi Thu Hoai;;山体滑坡对可持续性发展的影响(英文)[A];北京论坛(2008)文明的和谐与共同繁荣——文明的普遍价值和发展趋向:“生态文明:环境、能源与社会进步”环境分论坛论文或摘要集[C];2008年
10 ;Continuous Monitoring of Landslide and Atmospheric Water Vapor Using GPS:Application in Pubugou Hydropower Resettlement Zone[A];第三届中国卫星导航学术年会电子文集——S08卫星导航模型与方法[C];2012年
中国博士学位论文全文数据库 前1条
1 穆塔西姆;湖北省恩施地区滑坡岩土体的工程地质特性研究[D];中国地质大学;2008年
中国硕士学位论文全文数据库 前1条
1 阿里夫(Aref Mohammed Othman Al-Jabali);也门地区滑坡崩塌的初步研究[D];吉林大学;2005年
中国知网广告投放
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978