ANALYSIS OF RIVER LEVEL AND OF THE VOLUME FLOW ON THE DANUBE CLOSE TO THE CITY OF TULCEA, BASED ON IN SITU MEASUREMENTS

This work presents a review of hydrological data known as water levels and volume flows that have been recorded and then processed to render a contour about the hydrological situation of the Danube River near Tulcea. Onsite measurements have generated daily data on river flows and levels over a 3-year period (2003, 2004, 2006), their interpretation being important for knowing the water drainage regime. Moreover, the characteristic values can have a practical interest in some river design works, such as hydrotechnical flood defense constructions that may occur as a result of elevated levels above a certain threshold or may be beneficial during works or exploitation of river bed resources. In order to accurately present the importance of knowing the river level variation, it is necessary to process, verify and interpret all data on the levels and flows, establish links and graphical correlations, and determine the characteristic values over the multiannual period. The results obtained from the measurements are described in the four periods of the year, and the conclusion shows that each period is manifested both in climatic and hydrological terms by specific characteristics and phenomena.