Ziwa Abaya au Abaya Hayk (zamani pia Margherita) linapatikana kusini magharibi mwa Ethiopia. Ziwa linachangiwa na Mto Bilate, mto Gidabo na Mto Gelana, halafu linatokwa na mto Kulfo unaopeleka maji kwenye ziwa Chamo Eneo lake lote ni kilometa mraba 1162, urefu ni kilometa 60 na upana kilometa 20 with a surface area of 1162 square kilometers.. Ndani yake vinapatikana visiwa kadha; kile kikubwa zaidi kinaitwa Aruro. Ababu Teklemariam, Bernd Wenclawia (2004). Water Quality monitoring within the Abaya-Chamo Drainage Basin. Jalada kutoka ya awali juu ya 2018-02-07. Iliwekwa mnamo 2018-02-06. Statistical Abstract of Ethiopia for 1967/68 Baxter, R. M. Lake Morphology and Chemistry. in Taylor, W.D. and Tudorancea, C., eds. Ethiopian Rift Valley Lakes. Leiden: Backhuys Publishers, 2002. ILEC Archived 14 Julai 2007 at the Wayback Machine.