The Mărcușa (also: ''Cernat'') is a right

tributary A tributary, or an ''affluent'', is a stream or river that flows into a larger stream (''main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which they ...

of the

Râul Negru The Râul Negru (; literally meaning "Black River") is a left tributary of the river Olt in Romania. It joins the Olt in Lunca Câlnicului.Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...

. It flows into the Râul Negru between the villages Mărcușa and Surcea.Marcusa (jud. Covasna)
e-calauza.ro Its length is and its basin size is .

Tributaries

The following rivers are tributaries to the river Mărcușa (from source to mouth): *Left: Lunca (Retiul) *Right: Pârâul Întunecat, Groapa Pietroasă, Pârâul Rupt, Bortofălău, Pârâul Mic, Albiș

References

Rivers of Romania Rivers of Covasna County {{Covasna-river-stub