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Quiz/Review

Quiz/Review. Get out a small piece of paper and put your name on it. When the bell rings, the quiz will begin. Question 1. What are some risks form earthquakes?. Question 2. What controls how big an earthquake feels?. Question 3.

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Quiz/Review

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  1. Quiz/Review • Get out a small piece of paper and put your name on it. • When the bell rings, the quiz will begin.

  2. Question 1 • What are some risks form earthquakes?

  3. Question 2 • What controls how big an earthquake feels?

  4. Question 3 • What building codes (describe one) change the affects of earthquakes.

  5. Answers • Ground motion, fire, landslides, tsunami, buildings • Ground type, proximity, preparedness • Foundations, beams and flexibility

  6. Flooding and landslides Affects on society

  7. Location Floods Landslides Base of slopes Near drainage areas Loose sediment slopes Locations with lots of precipitation. • River Deltas (flood plains) • Low lying areas • Near ocean and lakes

  8. Risks and effects Floods Landslides Physical damage Loss of land Tsunami Death • Physical damage • Diseases • Sewage • Critters • Contaminates water • Economic • Death

  9. Prevention Floods Landslides Retaining walls Removing mass up hill Strengthen the base of a slope Reduce water • Dams and levees • Widen streams • Sandbags or large rocks

  10. Predictions Floods Landslides Usually after a precipitation event. Many events are slow at first but not all! • Usually after a precipitation event. • Rather easy to predict. • Can be from a dam break. • Hard to predict

  11. Major past events Floods Landsides 1911 rock slide Tajikistan 1938 mudflow Japan 1964 Landslide and flow Alaska 1980 Lahar Washington 1985 Flow Nevado del Ruiz • 1931 2.5-3.7 million deaths, China • 1887 1-2 million deaths, China • 1938 500,000-700,000 deaths, China • 1889 Johnstown PA 2,200 deaths • 1937 Ohio River 385 deaths.

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