Kinamasi cha Machar kinapatikana Sudan Kusini . Kinapokea maji kutoka mito Yabus, Daga na Khor Machar, halafu maji yake yanaelekea mto Naili kupitia mto Adar. Orodha ya mito ya Sudan Kusini Topographical map of Jonglei. Jalada kutoka ya awali juu ya 2011-09-29. Iliwekwa mnamo 2020-03-25. Sutcliffe, J. V. (1999). "The Sobat Basin and the Machar Marshes", The Hydrology of the Nile. Retrieved on 2011-07-22.  page 112