Part 9. LEVEES AND CREVASSES. Model levee design. The theory of levees proposed to confine the river’s mass in its main flow channel, encouraging scour during high flow. Natural crevasses beneath levees.
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LEVEES AND CREVASSES
Crevasses are sand filled distributary channels that form at high flow, and lie beneath earthen levees like ticking time bombs, waiting to explode.
Seepage crevasse exposed at the east levee of the IHNC breach in New Orleans after Hurricanes Katrina and Rita