River basin management, Bulgarian case study

The aim of this paper is to present an overview of Tundja river basin management. Tundja is one of the biggest tributaries of Mariza river and it is join it in the territory of Turkey. The basin belongs to the East Mediterranean hydrological zone. The hydrological investigations and estimations of natural river flow along the main river body and it's tributaries will be discussed in details. The calculations concern 1961-2004 study period. Long-term assessment has been performed. The characteristics of the monthly, annual, minimum and maximum river discharges have been obtained.