The Valea Neagră is a left

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 drainage ...

of the Crasna river. It originates in

Romania Romania ( ; ro, România ) is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern, and Southeast Europe, Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, S ...

near the village of Foieni, crosses into

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia a ...

north of

Urziceni Urziceni () is a city in Ialomița County, Muntenia, Romania, located around 60 km north-east of Bucharest. It has a population of 14,053: 93.1% Romanians, 4.6% Roma and 1.6% Hungarians. Demographics As the census of 2011 results show ...

and finally joins the Crasna near

Mérk Mérk is a village in Szabolcs-Szatmár-Bereg county, in the Northern Great Plain region of eastern Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Pannonian Basin, Carpathian Basin, it ...

. In Romania, its length is and its basin size is .

References

Rivers of Romania Rivers of Hungary Rivers of Satu Mare County International rivers of Europe {{Hungary-river-stub