The Gadar River rises in the Iranian Zagros Mountains close to where the borders of Iran, Turkey and Iraq meet. From its source, the river flows towards the southeast and then changes course due east through the Ushnu-Solduz valley. After leaving the valley, the river turns north and flows into the marshes bordering the endorheic saltwater Lake Urmia. The length of the river is approximately 100 kilometres (62 mi), its drainage basin is variously estimated as 1,900 square kilometres (730 sq mi) and 2,123 square kilometres (820 sq mi) and its discharge is 0.34 cubic metres (12 cu ft) per second. The Ushnu-Solduz valley has been occupied for many millennia, as testified by the excavations at sites like Hasanlu Tepe and Hajji Firuz Tepe.
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👉 Gadar River in the context of Hasanlu Tepe
Teppe Hasanlu or Hasanlu Tepe (Persian: تپه حسنلو) is an archeological site of an ancient city located in northwest Iran (in the province of West Azerbaijan), a short distance south of Lake Urmia. The nature of its destruction at the end of the 9th century BC essentially froze one layer of the city in time, providing researchers with extremely well preserved buildings, artifacts, and skeletal remains from the victims and enemy combatants of the attack. The site was likely associated with the Mannaeans and possibly with the Armenians.
Hasanlu Tepe is the largest site in the Gadar River valley and dominates the small plain known as Solduz. The site consists of a 25-m-high central "citadel" mound, with massive fortifications and paved streets, surrounded by a low outer town, 8 m above the surrounding plain. The entire site, once much larger but reduced in size by local agricultural and building activities, now measures about 600 m across, with the citadel having a diameter of about 200 m.