HaBesor (Hebrew: נחל הבשור, Nahal HaBesor) is a wadi in southern Israel. The stream begins at Mount Boker (near Sde Boker), and spills into the Mediterranean Sea near Deir al-Balah in the Gaza Strip, where it is called Wadi Gaza. The stream is the largest in the northern Negev, and together with its largest tributaries, the Grar and Beersheba streams, reaches as far as Sde Boker, Yeruham, Dimona and Arad/Tel Arad. Much of the water of the Wadi Gaza is diverted in Israel by means of dams, which makes the Gaza Aquifier the only significant source of water in the Gaza Strip The Wadi Gaza runs through a wetland, the Gaza Valley, and is at 2012 used as a wastewater dump.
In the Old Testament Besor was a ravine or brook in the extreme south-west of Judah, where 200 of David's men stayed behind because they were faint, while the other 400 pursued the Amalekites (1 Samuel 30:9-10, 30:21). Probably south of Gaza.
Tributaries from south to north: HaRo'e Stream, Boker Stream, Mesora Stream, Zalzal Stream, Revivim Stream, Atadim Stream, Beersheba Stream, Grar Stream, Assaf Stream, Amar Stream, Sahaf Stream and Wadi Abu Katrun.
Tell el-Farah (South) is located on the west of Nahal Besor. It was first excavated by Flinders Petrie in 1928 to 1929 and again recently excavated in 1999 and 2000 under direction of Gunnar Lehmann of Ben-Gurion University of the Negev and Tammi J. Schneider of Claremont Graduate University. As of 2013, it is under excavation again.
Petrie first identified the site as Beth-Pelet (Joshua 15:27) and published the excavation reports under the names Beth-Pelet I - II. It has been linked by William Foxwell Albright to the ancient settlement of Sharuhen, although Tell el-Ajjul on the south bank of Nahal Besor and locations further to the coast have also been suggested. The tell is 37 hectares (4,000,000 sq ft) in size 15 metres (49 ft) high and was an important fortified site in the Middle bronze age. It was controlled by Egypt in the later bronze age and inhabited by philistines into the iron age. A hematite seal in the shape of the head of a bull was found and identified by Flinders Petrie to originate from Syria, it showed a bull attacking a lion beneath a scorpion. Nahal Besor has also shown evidence of epipaleolithic sites above paleolithic sediments. It has also been suggested to be the Brook of Egypt. Various ostracons have been recovered from around the site with Aramaic inscriptions analysed and translated by Joseph Naveh.
Several archaeological sites were excavated by Eann Macdonald in 1929 to 1930 along the Wadi Ghazzeh in lower Nahal Besor that show signs of specialist flint production. Some of these sites were re-excavated in 1969 by Jean Perrot. Finds of pottery and flints were studied by Ann Roshwalb who found evidence of both Egyptian and late neolithic occupations.
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