slope processes landslides and subsidence chapter 8 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Slope processes, landslides and subsidence (Chapter 8) PowerPoint Presentation
Download Presentation
Slope processes, landslides and subsidence (Chapter 8)

Loading in 2 Seconds...

play fullscreen
1 / 8

Slope processes, landslides and subsidence (Chapter 8) - PowerPoint PPT Presentation


  • 550 Views
  • Uploaded on

Slope processes, landslides and subsidence (Chapter 8). La Conchita, January 10, 2005. http://landslides.usgs.gov/recent/events/laconchita/images/LaConchita0105_sm.mov. Mass wasting (page 241).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Slope processes, landslides and subsidence (Chapter 8)' - penn


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
la conchita january 10 2005
La Conchita, January 10, 2005

http://landslides.usgs.gov/recent/events/laconchita/images/LaConchita0105_sm.mov

Mass wasting (page 241)

  • Materials moving down under gravity “Material” = loose rocks, soils, artificial fills or a combination of these
  • Can be fast (landslides), or slow (creep)
types of movement pages 243 244 fig 8 4
Types of movement (pages 243-244, Fig. 8.4)
  • SLIDE

When materials move along a definite plane

  • SLUMP

When materials move along a curved plane

  • FALL

When loose materials fall freely under gravity

  • FLOW

Movement of a thick, soupy fluid

slide5

LANDSLIDE CAUSES (pages 245-256)

  • Modified from USGS Landslide fact sheet
      • http://pubs.usgs.gov/fs/2002/3072/
        • Geological causes
  • Weak, sensitive and/or broken materials (sheared, jointed or fissured etc.)
  • Weathered materials
  • Materials with a discontinuous plane oriented parallel to slope (bedding, schistosity, fault, unconformity, contact, etc.)
  • Contrast in permeability and/or stiffness of materials
slide6

Morphological causes

  • Tectonic or volcanic uplift
  • Glacial rebound
  • River, wave, or glacial erosion
  • Underground erosion (solution, piping)
  • Deposition loading on top of slope
  • Vegetation removal (by fire, drought)
  • Thawing
  • Freeze-and-thaw weathering
  • Shrink-and-swell weathering
slide7

Human causes

  • Excavation of slope or its toe
  • Loading of slope or its crest
  • Drawdown (of reservoirs)
  • Deforestation
  • Irrigation
  • Mining
  • Artificial vibration
  • Water leakage from utilities