ESTIMATING MULTIANNUAL AVERAGE RUNOFF DEPTH IN THE MIDDLE AND UPPER SECTORS OF BUZĂU RIVER BASIN

Romulus COSTACHE

ABSTRACT: The middle and upper sectors of Buzău river basin are located within an area highly exposed to flash floods. Thereby, studying surface runoff on different areas is very important. In this study, the average multiannual runoff depth was determined and spatially modelled by Curve Number method adjusted with slope. Generally, surface runoff values spatial distribution is correlated with precipitation amount. Also, surface coefficient was computed for the study area, due to its valuable information of the way that surface runoff occurs on slopes, during torrential rainfall. The results concluded that the Subcarpathian area between Buzău and Slănic river valleys is the most prone to torrential associated phenomena.

Keywords: Curve Number, Slope, Buzău catchment, Runoff, Runoff coefficient

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