JIFARAH, AL-

also called Jeffara, Djeffara, or Gefara, coastal plain of northern Africa, on the Mediterranean coast of extreme northwestern Libya and of southeastern Tunisia. Roughly semicircular, it extends from Qabis (Gabes), Tunisia, to about 12 miles (20 km) east of Tripoli, Libya. Its maximum inland extent is approximately 80 miles (130 km), and its area of 14,300 square miles (37,000 square km) is about equally divided between the two countries. Al-Jifarah slopes southward from the Mediterranean coast up to the tableland of the Sahara in three distinct regions. In the north is a narrow, low, coastal strip characterized by sandy beaches and many small hollows covered with sabkhah (saline plains with small lakes in the rainy season). South of this is a gently rolling area of steppe vegetation, varying in elevation from about 160 to 650 feet (50 to 200 m) above sea level. The southernmost region is a piedmont at the foot of the Saharan upland, known in Libya as the Nafusah Plateau. In Tunisia this tableland sends out a long north-south spur that forms the western border of the coastal plain and is called az-Zahr, or Dahar (Arabic: the back). Most of the area has 510 inches (125250 mm) annual rainfall, except for the coastal area around Tripoli, which has about 15 inches (380 mm). The coastal strip supports many palm groves; some fruit and grain crops are grown. The central region of the Jifarah, with a much lower water table, supports only nomadic herding of sheep and goats. The narrow piedmont area of al-Jifarah (up to about 1,000 feet above sea level), a desert region with scattered oases, is everywhere separated from the Saharan upland by pronounced scarp ridges, or cuestas.