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

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or 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 drain the surrounding drai ...

of the

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

. 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