SULUISTIQ, daryoest dar Pomiri Sharqi (nohiyai Murgobi Viloyati Avtonomii Badakhshoni Kuhi), kalontarin shokhobi chapi daryoi Oqsu. Suluistiq az vasli daryohoi Istiq va Boshbuloq, ki obi onho az nishebihoi shimolii qatorkuhi Vakhon jori meshavad, ba vujud omadaast. Tulash 115 km, masohati havzaash 1330 km2. Tobiston purob (iyul — avtonomi to 20 m3/son) va zimiston kamob megardad. Az miyonahoi dekabr to okhiri mart yakh mebandad.
Yu. Uskov.