Tekirdag, although located in the Ergene basin, has a sparse and limited river network due to insufficient vegetation, rainfall, and geological structure. The flow rates and regimes of the rivers are irregular and proportional to the amount and regime of rainfall. In summer, their waters decrease and they dry up, while in winter, they increase and even overflow with rainfall and snowmelt. The streams within the province's borders only carry rainwater and snowmelt. Furthermore, there are no sources feeding them. The province's rivers flow into the Gulf of Saros, the Sea of ​​Marmara, and the Black Sea. The Ergene River and its tributaries, flowing east-west within the Ergene basin, are the most important rivers of the province. Originating in Güneşkaya near Saray, the Ergene flows southwest, joining the Corlu and Vize streams near Inanli village in Muratli, thus taking the name Ergene River. From the south, the Hayrabolu Cene (Besiktepe) streams join the Ergene River. After leaving the provincial borders, the Ergene River joins the Meric River near İpsala and empties its waters into the Gulf of Saros.