0 a wall made of soil or other materials that is built next to a river to stop the river from overflowing (= coming out of a place because it is too full) -- 防洪堤（在河邊由土等材料築成的牆，以防止河水溢出）
The original levee en masse was a system of conscription enforced from above, but it was presented as a spontaneous expression of popular will.
The terms embankments and levees are used interchangeably here.
Trees with small crowns occur frequently in topographic depressions, whereas trees with extensive crowns dominate the levees.
This may partly be because the pteridosperms were probably growing on the levees and other raised areas in the forest with clastic substrates.
Within the same type of high or low levee, farmers' crop choice between plantain and manioc also involves risk-return calculations.
Individual flows are typically blocky and have welldefined levees and flow fronts.
The initial zone reflects mangrove associations on an expanding mudflat or low levee.
It may also consist of the higher reaches of natural levees, terrain that normally does not flood.
