The Călmățui is a left

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

Danube The Danube ( ; see also #Names and etymology, other names) is the List of rivers of Europe#Longest rivers, second-longest river in Europe, after the Volga in Russia. It flows through Central and Southeastern Europe, from the Black Forest sou ...

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 ...

. Its source is a few kilometers southwest of

Buzău Buzău (; formerly spelled ''Buzeu'' or ''Buzĕu'') is a city in the historical region of Muntenia, Romania, and the county seat of Buzău County. It lies near the right bank of the Buzău River, between the south-eastern curvature of the Carp ...

. The long Călmățui flows generally eastwards and into the Danube at Gura Călmățui.Calmatui (jud. Braila)
e-calauza.ro Its basin size is .

References

Rivers of Romania Rivers of Buzău County Rivers of Brăila County {{Buzău-river-stub