Hydrodynamic modeling study on a sector of the Timis River

Abstract

To determine the water flow regime through the minor and major bed of the Timiș River, in the area associated with the studied sector, (levels, flow rates, hydrodynamic slopes, flood zones), as well as determining the discharge capacity of the bed on this analysis section, it was necessary to carry out a discrete numerical modeling in different variants of water flow transit. The assessment of the existing situation was based on the current topographic elevations materialized on the situation plan, the cross-sections and the maximum flows corresponding to the arranged regime, by the Waters National Administration. The analysis sector of the Timiș River was divided into segments (40) limited at the ends by (41) cross- sections obtained in accordance with the actual topographic elevations. The numerical modelling was carried out with the specialized program HECRAS version 4.1 and version 6.3.1. The calibration of the numerical model was carried out at the transit of the historical hydrograph where the maximum level reaches the recorded value Hmax and corresponds to a maximum value of the flow rate Qmax. Next, the transit of the synthetic flood hydrograph was carried out resulting in the identification of the flooded areas on the discrete numerical model as well as where the flow reaches the maximum value.