The geographical region referred to as HaBesor stretches from the Israeli border with the Gaza Strip to kibbutz Urim in the south.
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.