The city of new orleans is in the delta of a great river. during hurricane katrina most of the city flooded but the area along the river, like the french quarter, did not. why didn't these areas flood?

i need to see the questions able to answer sorry

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.