It is bordered by Lakshmipur and Barisal districts to the north , Bay of Bengal to the south , Lakshmipur and Noakhali districts , Meghna ( lower ) river and Shahbazpur Channel to the east , Patuakhali district and Tentulia river to the west . It is bounded by Lakshmipur and Barisal districts to the north , Bay of Bengal to the south , Lakshmipur and Noakhali districts , Meghna ( lower ) river and Shahbazpur Channel to the east , Patuakhali district and Tentulia river to the west .