The Bolshaya Ercha is a right
tributary of the Indigirka. It has its sources in the northern slopes of the
Ulakhan-Sis range. The river flows first northwestwards in its uppermost section, and then in a roughly western / WSW direction skirting the
Kondakov Plateau which rises to the north. In its last stretch the river descends into the
Indigirka floodplain among numerous lakes where it
meanders strongly, forming
oxbow lakes. Finally the Bolshaya Ercha joins the Indigirka from its mouth. Now uninhabited
Vorontsovo village lies near the confluence, on the facing bank of the Indigirka.
Tributaries The main tributary of the Bolshaya Ercha is the long
Malaya Ercha on the right, as well as the long Kusagan-Yurekh (Кусаган-Юрэх), the long At-Khaya (Ат-Хайа), the long Kistike (Кистикэ) and the long Erkichan (Эркичан) on the left. The river is frozen between the beginning of October and the beginning of June. There are more than 600 lakes in its basin. ==See also==