22°0

0’

22°

20’

22°

40’

23°

00’

N

22°

00’

22°

20’

22°

40’

Bay of Bengal

Bangladesh91°20’ 91°40’ 92°00’ E

Chittagongdistrict

91°20’ 91°40’ 92°00’ E

Khagrachhari

Rangamati

Feni

Cox’s bazar

Ban

darb

an

Noakhali

Tripura(India)

5 0 5 10 km

Study area

Patiya

Bay

of b

enga

l

Bay of Bengal