Floodwalls and Levees
The placement of floodwalls or levees around the structure
fig 1-11-Floodwalls and levees-Floodwall is reinforced and anchored to withstand flood load, Levee is compacted fill with 2:1 or 3:1 slope (for stability), Sump pump removes seepage and internal drainage, backflow valve prevents sewer and drain backup
Figure 1-11. Structure protected by floodwall and levee