The Siret or Sireth is a river that rises from the Carpathians in the Northern Bukovina region of Ukraine, and flows southward into Romania before it joins the Danube. It is 647 km (402 mi) long, of which 559 km (347 mi) in Romania, and its basin area is 44,811 km2 (17,302 sq mi), of which 42,890 km2 (16,560 sq mi) in Romania. Its average discharge is 250 m3/s (8,800 cu ft/s). In ancient times, it was named Hierasus.
The Bârlad is a river in eastern Romania, a left tributary of the river Siret. Its total length is 207 km (129 mi), and its drainage basin area is 7,220 km2 (2,790 sq mi). Its source is in the low hills between the Siret and Prut rivers, southwest of Iași. It flows generally south, through the cities of Negrești, Vaslui, Bârlad and Tecuci. The Bârlad flows through the Romanian counties of Neamț, Vaslui and Galați. It flows into the Siret near Suraia.
The Berheci is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad in Poșta. Its length is 92 km (57 mi) and its basin size is 1,021 km2 (394 sq mi).
The Corozel is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad in Barcea. Its length is 41 km (25 mi) and its basin size is 195 km2 (75 sq mi).
The Tecucel is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad in the city Tecuci. Its length is 28 km (17 mi) and its basin size is 112 km2 (43 sq mi).
The Tutova is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad in the village Tutova. It flows through the villages Plopana, Străminoasa, Dragomirești, Mărășești, Puiești, Iana, Pogana, Ciocani, Ivești and Pogonești. Its length is 86 km (53 mi) and its basin size is 687 km2 (265 sq mi). The Cuibul Vulturilor Dam is located on the river Tutova.
The Pereschiv is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad in Ghidigeni. Its length is 44 km (27 mi) and its basin size is 242 km2 (93 sq mi). Its source is near the village Șendrești. Lake Pereschiv is located on this river.
The Jaravăț or Jăravăț is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad in Grivița. Its length is 29 km (18 mi) and its basin size is 152 km2 (59 sq mi).
The Velna is a left tributary of the river Bârlad in Romania. It crosses the village of Ipatele and joins the Bârlad near Negrești. Its length is 13 km (8.1 mi) and its basin size is 38 km2 (15 sq mi).
The Simila is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad in the village Simila, near the city Bârlad. Its length is 44 km (27 mi) and its basin size is 267 km2 (103 sq mi).
The Racova is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad near the city Vaslui. Its length is 49 km (30 mi) and its basin size is 329 km2 (127 sq mi). The Pușcași Dam is located on this river.
The Sacovăț is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad near Todirești. The Tungujei Dam is located on the Sacovăț. Its length is 54 km (34 mi) and its basin size is 314 km2 (121 sq mi).
The Vaslui is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad south of the city Vaslui. Its length is 81 km (50 mi) and its basin size is 692 km2 (267 sq mi). The Solești Dam is located on this river.
The Rebricea is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad near Vulturești. Its length is 27 km (17 mi) and its basin size is 158 km2 (61 sq mi).
The Bozieni is a left tributary of the river Bârlad in Romania. It flows into the Bârlad in Cuci. Its length is 15 km (9.3 mi) and its basin size is 38 km2 (15 sq mi).
The Humăria is a left tributary of the river Stavnic in eastern Romania. It flows into the Stavnic in Frenciugi. The Stavnic is a tributary of the Bârlad, which in turn is a tributary of the Siret, which joins the Danube. Its length is 10 km (6.2 mi) and its basin size is 22 km2 (8.5 sq mi).
The Stavnic is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad in Vulturești. The Căzănești Dam is located on the Stavnic. Its length is 46 km (29 mi) and its basin size is 212 km2 (82 sq mi).
The Stemnic is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad near Bălteni. Its length is 32 km (20 mi) and its basin size is 150 km2 (58 sq mi).
The Horoiata is a right tributary of the river Bârlad in Romania. It discharges into the Bârlad near the village Horoiata. It originates on the Tutova Plateau near Fundu Văii. It crosses the localities of Fundu Văii, Căpușneni, Orgoiești, Vișinari, Vlădești, Ulea, Unțești and Horoiata, before joining the Bârlad near Gara Banca. Its length is 29 km (18 mi) and its basin size is 45 km2 (17 sq mi).
The Crasna is a left tributary of the river Bârlad in Romania. It discharges into the Bârlad in the village Crasna. The Mânjești dam is located on the Crasna. Its length is 61 km (38 mi) and its basin size is 527 km2 (203 sq mi).
