Haarlem Lake

Dutch  Haarlemmermeer,   polder (area 45,700 acres [18,486 hectares]) coextensive with the gemeente (commune) of Haarlemmermeer in Noord-Holland provincie, western Netherlands. Originally, a number of lakes—with a combined area of about 14,000 acres (5,700 hectares) in 1531—were formed into one by successive inundations, and by the 1830s the water area had increased to nearly 45,000 acres (18,200 hectares). Floods frequently threatened the cities