Download
the sinking of venice subsidence n.
Skip this Video
Loading SlideShow in 5 Seconds..
The “Sinking” of Venice: Subsidence PowerPoint Presentation
Download Presentation
The “Sinking” of Venice: Subsidence

The “Sinking” of Venice: Subsidence

266 Views Download Presentation
Download Presentation

The “Sinking” of Venice: Subsidence

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. The “Sinking” of Venice: Subsidence Joshua Slater

  2. Subsidence • A sinking or settling of earth’s surface • Natural • Earthquakes • Volcanic activity • Solution of limestone • Man-induced • Fluid extraction • Mining • Loose sediment

  3. Mitigation anticipate monitor, restrict act. fluid injection import surface water pillars in mines Problems coastal & river areas drainage paths drainage devices sewers, canals irreversible

  4. Venice, Italy

  5. Venice (cont.) • Built - coastal marshes • ~10 ft. since founded • 1ft./century • “aqua alta” • causes • diverted rivers • natural gas • ~20,000 wells • rising sea level

  6. Mitigation closed wells aqueduct moveable barriers Still irreversible Venice (cont.)