Geological Hazards and Their Impact_McGeary_Date_041410

Geological Hazards and Their Impact_McGeary_Date_041410 -...

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Landslides - falls: free fall i.e. rockfall fastest type of movement to stabilize against: netting, pouring concrete - slides: cohesive movement along slide plane i.e. slump, block glide cohesive unit of rock or soil moves down - flows: material moves chaotically i.e. rock avalanche, creep, debris flow - slumping occurs often when highways cut into slopes occurs after big rainfall install pipes to help drain slopes so they don’t collapse - debris flows also called debris avalanche very rapid looks like water flowing down the hillside - creep: everything moves up perpendicular to the slope when it freezes then slowly falls
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Unformatted text preview: vertically along the slope when it unfreezes ← ←- stop mass movements: • install sensors on suspect terrain • install drainage system to release groundwater • make the surface impermeable ← ← La Conchita, CA • Located along pacific coast highway • Hills made up of weak shale and unconsolidated sediment • Very steep terrain • The site of many landslides over the years • Human activity aggravated hazards • Material flowed out at base, traveling farther then a slide because of fluid ← ←...
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