local factors effecting flooding Flashcards
(3 cards)
1
Q
height of land
A
low lying coasts (1.2m)
due to surges or sea level rise
app- maldives, 340000 pop, across 1200 islands, only 2.3m above ground, male covered by 3m sea wall
2
Q
vegetation removal
A
reduces flood risk as absorbs wave energy
stablises exsisting sediment
traps new sediment raising height of land
app- bangledesh, mangrove forests, 71% removed, high erosion rate
3
Q
storm surges
A
temporary rise in sea level when storm hits a coast, force of current causes rapid erosion
app- cyclone sidr, 6m storm surge, 15000 killed, 1.6 million homes destroyed
made worse by funnel shaped bay
