Wira, RahmansyahRifardi2014-11-092014-11-092014-11-09Dodyhttp://repository.unri.ac.id/xmlui/handle/123456789/6518This research was conducted from 3-10 December 2009 at Rokan River Estuary. This study aimed to find out how big the supply of suspended solids entering the Rokan River estuary waters. The method used his the method of survey and nonrandom purposive sampling. Suspended matter content analysis followed standard methods proposed by the Indonesian National Standard in Mukminin (2008). Results showed the supply of suspended solids entering through either sequentially streamflow into the ebb tide and at low tide to high tide his for station 3 (Mill River mouth) of 1322.764 g / s and 340.844 g / sec, to station 4 (Estuary Rokan River right part) of 329,079.770 gr / sec and 297,900.580 gr / sec, and for station 5 (Rokan River mouth to the left) of 1412989.100 gr / sec and 1,131,184.300 gr / sec. Key Word : Suspended Solids, Estuary.TersuspensiMuaraUR-Scientific Work Lecturer