Geo 004 Natural Disasters and Hazards.docx

# Geo 004 Natural Disasters and Hazards.docx - Geo 004...

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1/8/19 Geo 004 Natural Disasters and Hazards Lecture #1: Introduction into Natural Disasters and Hazards What is a Natural Hazard? Hazard vs. Disaster o A danger or risk o A sudden event, such as an accident or a natural catastrophe, that causes great damage or loss of life Case Study: 2014 Oso Landslide Mitigation Strategies The 4 A’s of mitigation o Avoid o Accept o Anticipate o Alter Example: Living with a Landslide 1/10/19 Lecture #2: Maps Why Maps? Ways to Display Data o Maps Map types Basic map elements Scale o Topography/Topographic Maps Elevation Contour Lines o Geologic Maps o Tables, Graphs and Charts Tables, bar chart, histogram, scatterplots Topographic (Terrain) Navigational (Street) Map Thematic Map (Single Dataset) Map Design Elements Title North arrow Legend Graphical Scale Reference grid (longitude and latitude) Supplementary information Numeric Scale Three numbers needed to tell us our location on Earth: Latitude

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o How far to the north or south of the equator we are located? Longitude o How far to the east or west we are located from the prime meridian ? Elevation Map Scale Numeric Scale Verbal Scale Graphical Scale Determine Real-World Distance… Step 1: Measure distance between features on map with your ruler Step 2: Convert map distance (ruler distance) to real world distance using map scale Large Scale (relatively zoomed in, more detail) Small Scale (relatively zoomed out, less detail) Elevation Of 0 equals sea level (base line) Contours illustrate elevation o Cross section/profile To Calculate Slope: First: Ned to calculate the horizontal distance (Run) o 1. With ruler, measure distance on map o 2. Convert map to ground distance using scale, here 1-inch equals 2000 feet Horizontal distance = 0.5m x 2000 ft/1 in = 1000 ft Second: Need to calculate the elevation change (Rise) o Find elevation change from contour lines Elevation change = 5200 ft – 5000 ft = 200 ft Third: Calculate Slope o Slope = Rise/Run Slope = Rise/Run= Elevation Change/Horizontal Distance= 200 ft/ 1000 ft= 0.2 Percent slope= slope*100%= 0.2*100% = 20% Slope angle= arctan (slope) = arctan (0.2) = 11.3 degrees Table (organize and aggregate data) Bar Graph (show distribution of data) Histogram (shows frequency of something occurring) Plots (compare two things graphically) 1/15/19 Lecture #3: Plate Tectonics Volcanoes Earthquakes Tsunami Plate Tectonics The Earth’s internal heat engine Structure of Earth
o Chemical vs. Mechanical Layers Types of Plate Boundaries o Convergent, Divergent and Transform Evidence of Plate Tectonics o Shape of the Continents o Rocks of mountain belt o Fossils o Earthquake locations o Volcano locations and Hot Spot Volcanism o Seafloor magnetization and age What drives plate tectonics?

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• Fall '08
• Oglesby
• Plate Tectonics, Volcano, divergent plate boundary, o Shield volcano, o Seismic Waves,  Hazard vs. Disaster

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