 Jakarta lies in a low and flat alluvial plain, ranging from with an average elevation of above sea level with historically extensive swampy areas.Thirteen rivers flow through Jakarta.They are Ciliwung River, Kalibaru, Pesanggrahan, Cipinang, Angke River, Maja, Mookervart, Krukut, Buaran, West Tarum, Cakung, Petukangan, Sunter River and Grogol River.