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The Great Flood of 1993

The Great Flood of 1993. Mississippi River at St. Louis - Normal Flow. Mississippi River at St. Louis - 1993 Flood. Before. During. Floods. Where does the water come from? Rain Snow Glaciers Where does the water go? Rivers and river systems – watersheds. WATERSHED.

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The Great Flood of 1993

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  1. The Great Flood of 1993

  2. Mississippi River at St. Louis - Normal Flow

  3. Mississippi River at St. Louis - 1993 Flood

  4. Before During

  5. Floods • Where does the water come from? • Rain • Snow • Glaciers • Where does the water go? • Rivers and river systems – watersheds

  6. WATERSHED • Land from which water runs off into a stream. • Tributary – feeder stream that flows into a main stream. • Example – Illinois River into the Mississippi River • Distributary – a smaller stream flowing out of a larger stream. • What separates watersheds • Divides + =

  7. Illinois Watersheds

  8. Part of the Northern Mid-West Watershed

  9. Mississippi River - Controlled • Levee – natural and/or constructed ridge or embankment designed to prevent a river from flooding onto its floodplain? • Floods occur when water flows over or breaks through a levee

  10. Mississippi River – Record Low 1933

  11. Flood Conditions at Quincy, IL Summer ‘93

  12. House Near Quincy, IL

  13. Railroad on Levee

  14. Quincy Floodplain

  15. Flooded Farm at Quincy, IL

  16. Farmland –Before and After

  17. Flooded Bridge at Quincy

  18. Flood’s Effect on River Shipping

  19. Valmeyer, IL levee system

  20. Levee Breaking at Valmeyer,IL

  21. Levee Over-Flowing

  22. Break in Levee After the Flood

  23. Rescue Workers

  24. New town site on the Illinois Bluff

  25. Valmeyer, New Town Site

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