Question

what is meant by drought quadrilateral

Answer 1

…the Northeast, sometimes called the drought quadrilateral or drought polygon, that extends from northern Bahia to the coast between Natal and São Luís; that zone receives about 15–30 inches (375–750 mm) of precipitation a year.

Answer 2

the Northeast, sometimes called thedrought quadrilateral or drought polygon, that extends from northern Bahia to the coast between Natal and São Luís; that zone receives about 15–30 inches (375–750 mm) of precipitation a year. my